SERV-RITE®Wire
Product Description
Thermocouple
and Extension
Wire
RTD Lead Wire
Single pairs of thermocouple conductors are available using a variety of
insulation materials. Matched pairs with duplex insulation are color coded
according to ANSI MC 96.1-1982 requirements. The operating temperature
rating for thermocouple and extension wire is up to 2600°F (1427°C).
Nickel or tin plated 2, 3 and 4-wire copper conductor constructions are
available in a variety of gauge sizes. All types are twisted to achieve maximum
reduction of electromagnetic interferences, are available with PVC, FEP, PFA
or fiberglass insulations and are color coded according to ANSI requirements.
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SERV-RITE®Wire
General Information
Thermocouple and Extension Wire
Color Codes
United States and International Color Coding
Standard ASTM E 230 color coding (United States) is
used on all insulated thermocouple wire and extension
wire when insulation type permits. In color coding, the
right is reserved to include a tracer to identify the ASTM E
230 type. Thermocouple grade wire normally has a brown
overall jacket. For Types R and S, the color codes
correlate to the compensating cable normally used.
Thermocouple and Extension Wire Color Codes
Overall/Positive (+)/Negative (-)
ASTM ASTM
T/C E 230 E 230 BS DIN JIS IEC
Type T/C Extension 1843 43710 C1610-1981 584-3
E (overall) Brown Purple Brown Black Purple Violet
EP +Purple +Purple +Brown +Red +Red +Violet
EN Red- -Red -Blue -Black -White -White
J (overall) Brown Black Black Blue Yellow Black
JP +White +White +Yellow +Red +Red +Black
JN -Red -Red -Blue -Blue -White -White
K (overall) Brown Yellow Red Green Blue Green
KP +Yellow +Yellow +Brown +Red +Red +Green
KN -Red -Red -Blue -Green -White -White
N (overall) Brown Orange ————
NP +Orange +Orange ————
NN -Red -Red ————
R (overall) — Green Green — Black Orange
RP — +Black +White — +Red +Orange
RN — -Red -Blue — -White -White
S (overall) — Green Green White Black Orange
SP — +Black +White +Red +Red +Orange
SN — -Red -Blue -White -White -White
T (overall) Brown Blue Blue Brown Brown Brown
TP +Blue +Blue +White +Red +Red +Brown
TN -Red -Red -Blue -Brown -White -White
Various national and international standard agencies have
adopted color codes for identifiying thermocouples which
generally
differ from those specified in ASTM E 230. The
overall extension color code is also used to identify
connectors to specific thermocouple types.
UK Germany Japan
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WATLOW
®
SERV-RITE®Wire
Thermocouple Wire
Manufactured to Exact Specifications
Since 1914, SERV-RITE®thermocouple wire and
thermocouple extension wire have been recognized for
premium performance and reliability. All stock and
custom wire is manufactured in Watlow’s plant where
materials, manufacturing equipment and quality controls
are carefully selected to ensure superior uniformity.
Watlow offers popular wires as well as custom
manufactured wire using alloys and insulation types
to meet specific application demands.
All SERV-RITE thermocouple wire and thermocouple
extension wire is manufactured under rigid quality
controls following ISO 9001 standards. In addition, all
electromotive force (EMF) versus temperature calibration
procedures follow one or more of the following standards:
• ASTM E 207
• ASTM E 220
• AMS 2750
All testing has NIST traceability. Unless otherwise
specified, all SERV-RITE thermocouple wire and
extension wire are supplied to meet standard tolerances
of ASTM E 230. Special tolerances are also available.
Performance Capabilities
• Compliance with recognized agency tolerances
• Insulation temperature ranges from -328 to 2600°F
(-200 to 1427°C)
• Tolerances from ±0.5°C or ±0.4 percent
• NIST calibration certificates
• ISO 17025 Accredited Lab
Features and Benefits
Type E, J, K, N, S and T thermocouple wire
• Fit virtually all applications
Compensation extension wire
• Permits fine tuning of temperature measuring circuits
Solid or stranded wire
• Meets specific application requirements
Wide selection of insulation types
• Meets temperature, chemical, moisture and abrasion
resistance objectives
Color coding
• Complies with United States, United Kingdom,
German, Japanese and IEC standards
Metallic overbraids and wraps
• Enhance abrasion resistance
Stock RTD lead wire
• Meets virtually all industrial RTD applications
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SERV-RITE Wire
SHIPMENT
STOCKED FOR
SAME DAY
Thermocouple Wire
Stock Wire Products by Temperature
Thermocouple Wire Physical Properties
Max. Opr. Temp. Part Limits of Abrasion Moisture Chemical
°
F °C Insulation Number Error Description Resistance Resistance Resistance
K20-1-350 Standard Brd. C. Fbr./Brd. C. Fbr. Good Fair Good
2600 1427 Ceramic K20-1-355 Standard Brd. C. Fbr./Brd. C. Fbr. Good Fair Good
K20-2-350 Special Brd.C. Fbr./Brd. C. Fbr. Good Fair Good
K20-2-355 Special Brd. C. Fbr./Brd. C. Fbr. Good Fair Good
K20-1-301 Standard Brd. Sil./Brd.Sil. (heavy build) Fair Fair Good
2000 1093 Vitreous K20-1-365 Standard Brd. Sil./Brd.Sil. Fair Fair Good
Silica K20-2-301 Special Brd. Sil/Brd.Sil. (heavy build) Fair Fair Good
K20-2-365 Special Brd. Sil./Brd.Sil. Fair Fair Good
J20-1-321 Standard Brd. HT Gls./Brd. HT Gls. Good Good Good
High J20-2-314 Special Brd. HT Gls./TW Good Good Good
1652 900 Temp. J20-2-321 Special Brd. HT Gls./Brd. HT Gls. Good Good Good
Fiberglass K20-1-321 Standard Brd. HT Gls./Brd. HT Gls. Good Good Good
K20-2-314 Special Brd. HT Gls./TW Good Good Good
K20-2-321 Special Brd. HT Gls./Brd. HT Gls. Good Good Good
E20-1-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
J20-1-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
J20-1-S-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
J20-2-304 Special Brd. Gls./Brd. Gls. Fair Good Good
J20-3-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
J20-3-S-304 Standard Brd. Gls./Brd. Gls./SS Brd. Fair Good Good
J24-1-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
J24-2-304 Special Brd. Gls./Brd. Gls. Fair Good Good
J24-3-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
J28-2-305 Special Wrp. Dbl. Gls./Brd. Gls. Fair Good Good
1000 538 Standard J30-1-305 Standard Wrp. Dbl. Gls./Brd. Gls. Fair Good Good
Fiberglass J30-2-305 Special Wrp. Dbl. Gls./Brd. Gls. Fair Good Good
K20-1-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
K20-1-S-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
K20-2-304 Special Brd. Gls./Brd. Gls. Fair Good Good
K20-3-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
K20-3-S-304 Standard Brd. Gls./Brd. Gls./SS Brd. Fair Good Good
K24-1-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
K24-2-304 Special Brd. Gls./Brd. Gls. Fair Good Good
K24-3-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
K28-2-305 Special Wrp. Dbl. Gls./Brd. Gls. Fair Good Good
K30-1-305 Standard Wrp. Dbl. Gls./Brd. Gls. Fair Good Good
K30-2-305 Special Wrp. Dbl. Gls./Brd. Gls. Fair Good Good
S20-5-304* Standard Brd. Gls./Brd. Gls. Fair Good Good
T20-1-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
T24-1-304 Standard Brd. Gls./Brd. Gls. Fair Good Good
*Note: The recommended operating temperature is limited to the extension grade alloy recommended temperature of 400°F (204°C).
(heavy build)
(heavy build)
CONTINUED
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SERV-RITE Wire
SHIPMENT
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SAME DAY
Thermocouple Wire
Stock Wire Products by Temperature (Continued)
Thermocouple Wire Physical Properties
Max. Opr. Temp. Part Limits of Abrasion Moisture Chemical
°
F °C Insulation Number Error Description Resistance Resistance Resistance
J20-1-512 Standard Tp. P-mide/Tp. P-mide Excellent Excellent Excellent
J20-3-512 Standard Tp. P-mide/Tp. P-mide Excellent Excellent Excellent
800 427 Polyimide J24-2-511 Special Tp. P-mide/TW Excellent Excellent Excellent
Tape K20-3-512 Standard Tp. P-mide/Tp. P-mide Excellent Excellent Excellent
J20-1-508 Standard Tp. TFE/Tp. TFE Good Excellent Excellent
J20-2-508 Special Tp. TFE/Tp. TFE Good Excellent Excellent
J24-1-508 Standard Tp. TFE/Tp. TFE Good Excellent Excellent
J24-2-508 Special Tp. TFE/Tp. TFE Good Excellent Excellent
K20-1-508 Standard Tp. TFE/Tp. TFE Good Excellent Excellent
600 316 TFE Tape K20-2-508 Special Tp. TFE/Tp. TFE Good Excellent Excellent
K24-1-508 Standard Tp. TFE/Tp. TFE Good Excellent Excellent
K24-2-508 Special Tp. TFE/Tp. TFE Good Excellent Excellent
T20-2-508 Special Tp. TFE/Tp. TFE Good Excellent Excellent
T24-1-508 Standard Tp. TFE/Tp. TFE Good Excellent Excellent
T24-2-508 Special Tp. TFE/Tp. TFE Good Excellent Excellent
550 288 PFA J24-3-516 Standard PFA/PFA Good Excellent Excellent
K24-2-516 Special PFA/PFA Good Excellent Excellent
E20-1-507 Standard FEP/FEP Excellent Excellent Excellent
J16-5-509* Standard FEP/TWS/FEP Excellent Excellent Excellent
J20-1-507 Standard FEP/FEP Excellent Excellent Excellent
J20-1-509 Standard FEP/TWS/FEP Excellent Excellent Excellent
J20-2-507 Special FEP/FEP Excellent Excellent Excellent
J20-3-507 Standard FEP/FEP Excellent Excellent Excellent
J20-5-507* Standard FEP/FEP Excellent Excellent Excellent
J20-5-509* Standard FEP/TWS/FEP Excellent Excellent Excellent
J24-1-507 Standard FEP/FEP Excellent Excellent Excellent
500 260 FEP J24-2-507 Special FEP/FEP Excellent Excellent Excellent
J24-3-507 Standard FEP/FEP Excellent Excellent Excellent
J30-2-506 Special FEP/FEP Excellent Excellent Excellent
K16-5-509* Standard FEP/TWS/FEP Excellent Excellent Excellent
K20-1-507 Standard FEP/FEP Excellent Excellent Excellent
K20-1-509 Standard FEP/TWS/FEP Excellent Excellent Excellent
K20-2-507 Special FEP/FEP Excellent Excellent Excellent
K20-2-509 Special FEP/TWS/FEP Excellent Excellent Excellent
K20-3-507 Standard FEP/FEP Excellent Excellent Excellent
K20-5-507* Standard FEP/FEP Excellent Excellent Excellent
K20-5-509* Standard FEP/TWS/FEP Excellent Excellent Excellent
K24-1-507 Standard FEP/FEP Excellent Excellent Excellent
K24-2-507 Special FEP/FEP Excellent Excellent Excellent
K24-3-507 Standard FEP/FEP Excellent Excellent Excellent
K30-2-506 Special FEP/FEP Excellent Excellent Excellent
S20-5-507* Standard FEP/FEP Excellent Excellent Excellent
T20-1-507 Standard FEP/FEP Excellent Excellent Excellent
CONTINUED
*Note: The recommended operating temperature is limited to the extension grade alloy recommended temperature of 400°F (204°C).
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SERV-RITE Wire
SHIPMENT
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Thermocouple Wire
Stock Wire Products by Temperature (Continued)
Thermocouple Wire Physical Properties
Max. Opr. Temp. Part Limits of Abrasion Moisture Chemical
°
F °C Insulation Number Error Description Resistance Resistance Resistance
500 260 FEP T20-1-509 Standard FEP/TWS/FEP Excellent Excellent Excellent
T20-2-507 Special FEP/FEP Excellent Excellent Excellent
T20-3-507 Standard FEP/FEP Excellent Excellent Excellent
T24-2-507 Special FEP/FEP Excellent Excellent Excellent
T30-2-506 Special FEP/FEP Excellent Excellent Excellent
E20-5-502* Standard PVC/PVC Good Excellent Good
E20-5-510* Standard PVC/TWS/PVC Good Excellent Good
J16-5-502* Standard PVC/PVC Good Excellent Good
J16-5-510* Standard PVC/TWS/PVC Good Excellent Good
J20-5-502* Standard PVC/PVC Good Excellent Good
J20-5-510* Standard PVC/TWS/PVC Good Excellent Good
J20-7-502* Standard PVC/PVC Good Excellent Good
J20-7-510* Standard PVC/TWS/PVC Good Excellent Good
J24-1-505 Standard PVC/Ripcord Good Excellent Good
J24-2-505 Special PVC/Ripcord Good Excellent Good
K16-5-502* Standard PVC/PVC Good Excellent Good
221 105 PVC K16-5-510* Standard PVC/TWS/PVC Good Excellent Good
K20-5-502* Standard PVC/PVC Good Excellent Good
K20-5-510* Standard PVC/TWS/PVC Good Excellent Good
K20-7-502* Standard PVC/PVC Good Excellent Good
K20-7-510* Standard PVC/TWS/PVC Good Excellent Good
K24-1-505 Standard PVC/Ripcord Good Excellent Good
K24-2-505 Special PVC/Ripcord Good Excellent Good
S20-5-502* Standard PVC/PVC Good Excellent Good
S20-5-510* Standard PVC/TWS/PVC Good Excellent Good
T16-5-510* Standard PVC/TWS/PVC Good Excellent Good
T20-5-502* Standard PVC/PVC Good Excellent Good
T20-5-510* Standard PVC/TWS/PVC Good Excellent Good
T20-7-502* Standard PVC/PVC Good Excellent Good
T24-1-505 Standard PVC/Ripcord Good Excellent Good
T24-2-505 Special PVC/Ripcord Good Excellent Good
RTD Lead Wire
1000 538 Standard RT3-24-8-705 N/A Brd. Gls./TW/Brd. Gls. Fair Good Good
Fiberglass
500 260 FEP RT3-22-8-704 N/A FEP/TW/FEP Excellent Excellent Excellent
221 105 PVC RT3-22-4-701 N/A PVC/TW/PVC Good Excellent Good
*Note: The recommended operating temperature is limited to the extension grade alloy recommended temperature of 400°F (204°C).
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SERV-RITE Wire
SHIPMENT
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SAME DAY
Thermocouple Wire
Heat Treat Thermocouple Wire
Thermocouple Wire Physical Properties
Max. Opr. Temp. Part Limits of Abrasion Moisture Chemical
°
F °C Insulation Number Error Description Resistance Resistance Resistance
1800 982 High Temp.
Fiberglass
2200 1204 Vitreous
Silica
2200 1204 Ceramic
Legend
Brd. = Braided
Gls. = Fiberglass
TWS. = Twisted and shielded
HT = High temperature
Tp. = Taped
P-mide = Polyimide
Cbl. = Cable
TW. = Twisted
Wrp. = Wrapped
K20-2-321-CAL
K-20-2-301-CAL
K20-2-350-CAL
Special Brd. HT Gls./Brd. HT Gls. Good Good Good
Calculated from 200-1800°F
(93-982°C), every 200°F (93°C)
Special Brd. Vit. Sil./Brd. Sil. Fair Fair Good
Calculated from 200-2200°F
(93-1204°C), every 200°F (93°C)
Special Brd. C. Fbr./Brd. C. Fbr. Good Fair Good
from 200-2200°F
(93-1204°C), every 200°F (93°C)
Dbl. = Double
Cot. = Cotton
C.Fbr = Ceramic fiber
Sil. = Vitreous silica
Pr. = Pair
Std. = Standard
Spc. = Special
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SERV-RITE Wire
Thermocouple Wire
Ordering Information
How to Order
Include the following information when ordering
SERV-RITE thermocouple and extension wire:
Calibration
• E, J, K, N, S or T
Gauge size
• AWG gauge
Solid or stranded conductors
• Stranded conductors are seven strand constructions.
If other configurations are required, please contact the
factory.
Thermocouple or extension grade
• Determine if it will be used for the actual sensor or only
to “extend” the signal at lower temperatures.
Standard or special limits of error
• This will determine the accuracy of the sensor. Limits
of error are determined by testing at a pre-defined
Watlow standard test point. To guarantee limits of error
at other temperature points, please contact the factory
to arrange special testing.
Insulation on singles and duplex
• The insulation material used is usually chosen to fit the
environment where the sensor will be used.
Color coding
• Unless specified, all color coding is to ASTM E
230 standards.
Spool lengths
• Spool length requirements should be specified.
Watlow strives to maintain a policy of shipping 1,000
foot spools. However, if not specified, random lengths
may be shipped. If special packaging is required,
please contact the factory.
Variation in quantity
• Watlow follows the industry standard of shipping and
invoicing at plus or minus ten percent of the cost for
any ordered item. If requirements dictate anything other
than plus or minus ten percent, contact the factory for
potential additional charges.
Overbraid options
• Options for overbraid are shown below.
Overbraid selection code
• S–Stainless steel wire braid
C–Tinned copper wire braid
N–Alloy 600 wire braid
Options are listed on each page. Special requirements
and testing are available at additional cost. Contact the
factory for details. These include:
Shielding
• Some constructions are available with shielding
possibilities.
Calibration Tests
• If calibration is required, please specify temperatures.
Certificate of Compliance
• These may be provided for various specifications.
When ordering, please provide specification
requirements.
Special Requirements
• Please contact the factory for any requirements not
listed above.
Availability
Stock constructions: Many constructions are available
for same day shipment
Stock constructions with options: Shipment is usually
within five working days or less
Stock constructions requiring calibration or other
laboratory services: Shipment is usually within five
working days or less
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WATLOW
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SERV-RITE Wire
Thermocouple Wire
Technical Data
How to Select Wire to Meet Requirements
The following information will explain some of the
nomenclature associated with thermocouple wire and
thermocouple extension wire. By reading this information,
orders can be placed quickly and accurately.
Thermocouple Wire or Thermocouple
Extension Wire
There are some significant differences between wire used
to actually measure temperature and wire used to carry a
millivoltage signal to an instrument.
The most obvious difference is the color-code used to
identify the wire itself. In most instances, thermocouple
grade wire is identified by its overall brown color.
Exceptions in the SERV-RITE wire product line are the
very high temperature yarns such as
SERIES 301 and 350.
not used if there is no overall covering, as in SERV-RITE
wire SERIES 505, 511 and 314.
The functional differences between the two wires are that
thermocouple “extension” wire is not calibrated above
400°F (204°C). The temperature rating of the insulations
used on some extension grade wire exceeds 400°F
(204°C) temperature to allow the wire to survive
occasional contact with hot parts or furnace walls.
Terms used in the tables of this section:
Single Conductor Insulation
Identifies insulation type used on individual thermoelements.
Certain part numbers use a combination of insulations.
When there is a combination, insulations are listed in
order of application.
Duplex Conductor Insulation
Lists the overall insulation when one is used. Constructions
which have no overall insulation use this area to describe
the duplexing method—i.e. twisting, “ripcord”, etc.
Of course, the overall color code is
those used in the
Temperature Rating
Most constructions are rated for both continuous use
and for single reading applications. Continuous use
temperature is considered to be the highest temperature a
particular construction will survive indefinitely. The single
reading temperature is the highest temperature at which
the construction will perform and continue to produce an
accurate reading. However, after exposure to the single
reading temperature, the wire will exhibit less flexibility
and/or abrasion resistance. Therefore, it is not likely that
the wire could be removed from the application and
then reused.
ASTM E 230 Color Code
Generally, SERV-RITE wire has color codes wherever
possible. Exceptions are high temperature yarn
constructions such as the SERIES 301 and 350. Color
coding of the SERIES 511 and 512 is accomplished by
including a colored thread or “tracer” under the tape.
Physical Properties
Abrasion Resistance is rated fair, good, or excellent and
is based on the wall thickness of the construction and
how well it survives with other insulations of similar
thicknesses. The 511 SERIES receives an excellent rating
because the thin wall of polyimide tape will survive better
than almost any other insulation applied in the same wall
thickness. The “absolute” abrasion resistance of a
construction will depend not only on the type of insulation,
but on thickness at which it is applied.
Moisture Resistance ratings are given for wire in the
“as received” condition. In the case of fiberglass insulated
wire, moisture resistance is achieved by using
impregnations or spirally applied tapes called moisture
barriers. The impregnations and/or tapes will burn off
at temperatures below the upper useful operating
temperatures of the fiberglass. The thermoplastic
insulations (PVC and fluoroplastics) and polyimide
insulated constructions will maintain their moisture
resistance up to their “continuous” temperature rating.
Chemical Resistance ratings are applied as they relate
to most common chemicals. These ratings apply to
insulation types and not necessarily to the type of
impregnation used. Contact the factory for specific
applications.
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SERV-RITE Wire
Thermocouple Wire
Technical Data (Continued)
Metallic Overbraids and Wraps
Although standard SERV-RITE wire products are
designed to yield a high degree of abrasion resistance,
it is sometimes necessary to add an additional metallic
covering to further enhance this property. Following are
available overbraids and wraps.
Stainless Steel Wire Braid (S)
This most popular over-braid uses 300 series stainless steel
and is available on virtually all standard SERV-RITE wire
offerings. It is an economical method to extend the life of
thermocouple and extension wire. Several of Watlow’s
standard wire items are available from stock with a
stainless overbraid. Non-stock items are available as a
special order.
Alloy 600 Wire Braid (N)
Most commonly specified on high temperature SERV-RITE
wire yarn insulations, the Inconel®braid offers a higher
operating temperature than the series 300 stainless steel
overbraid. When this braid is specified on SERV-RITE
SERIES 350, the performance of the material is only
surpassed by metal-sheathed cables. Consult the factory
for availability on specific wire items.
Tinned Copper Wire Overbraid (C)
When there is a possibility of electrical interference in the
area of the thermocouple installation, it may be necessary
to shield the wire from electrical “noise.” Several Watlow
standard products use aluminized tapes as an intrinsic
shield. If shielding is needed on other constructions, a
tinned copper shield can be specified as a special order.
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SERV-RITE Wire
Thermocouple Wire
High-Temperature Vitreous Silica Braided
Thermocouple Wire SERIES 301 and 365
Both the SERIES 301 and 365 use vitreous silica yarn
as the insulation on both the conductors and duplex.
This yarn retains its flexibility after exposure to high
temperatures. Because this insulation has no binders or
impregnations, it may “flower” when stripped.
The vitreous silica yarn’s greater purity performs better
at high temperatures than other fibrous glass products.
Testing indicates that “contamination” will compromise
this material’s upper use temperature. For this reason,
our standard offering is supplied without color coding or
impregnations. The SERIES 365 construction is a
cost-effective, medium insulation build of the popular
heavy duty SERIES 301 construction.
For higher temperatures consider SERIES 350.
Performance Capabilities
• Continuous temperature rating: 1800°F (982°C)
• Vitreous silica braided yarn insulation
• Available with an optional metallic overbraid for
additional abrasion resistance
Popular Constructions
Grade AWG Wire Type Insulation Limits of Error Type K
Solid Heavy Standard K20-1-301
Thermocouple 20
* Calibrated from 200 to 2200°F (93 to 1204°C), every 200°F (93°C). Only available in this construction.
Note: Bolded products are stocked.
Solid Heavy Special K20-2-301
Solid Heavy Special K20-2-301-CAL*
Solid Medium Standard K20-1-365
Solid Medium Special K20-2-365
Applications
• Heat treating
• Oven and furnace
• Survey and load
Specifications
Continuous use temperature
• 1800°F (980°C)
Single use temperature
• 2000°F (1093°C)
Resistance properties
• Moisture: Fair
• Chemical: Good
• Abrasion: Fair
Wire Specifications
AWG
20
18
16
20
a
SERIES 301,2SERIES 365
Nominal Conductor Size
in. (mm)
a
a
a
2
0.032 (0.813) 0.018 (0.457) 0.015 (0.381) 0.098 x 0.154 (2.49 x 3.91) 15 (22.4)
0.040 (1.020) 0.018 (0.457) 0.015 (0.381) 0.110 x 0.180 (2.79 x 4.57) 19 (28.3)
0.051 (1.290) 0.016 (0.406) 0.015 (0.381) 0.118 x 0.198 (3.00 x 5.03) 25 (37.3)
0.032 (0.813) 0.015 (0.381) 0.012 (0.305) 0.090 x 0.140 (2.29 x 3.56) 13 (19.4)
Ordering Information
Part Number
③③⑤⑤④④
ASTM E
230
Calibration
①①
K=
Type K
N=
Type N
③③
②②
20 =
20 gauge solid
WATLOW
AWG
®
Conductor
Type/
Tolerance
ASTM E 230 Calibration
AWG
⑥⑥
⑦⑦②②①①
Insulation
Type
Nominal Insulation Thickness
Conductor
in. (mm)
Overall
in. (mm)
⑤⑤⑥⑥
Note: Minimum order sizes apply for non-stock constructions.
Nominal Overall
Size
in. (mm)
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
⑦⑦
301=
Heavy build
365=
Medium build
Conductor/Type Tolerance
Insulation Type
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
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SERV-RITE Wire
Thermocouple Wire
Fiberglass Braided Thermocouple and
Extension Wire SERIES 304
The uniform quality and availability of the SERIES 304
make it the ideal wire for general applications requiring
moderate abrasion and moisture resistance, wide
temperature capabilities and economy.
Each conductor is covered with a color coded glass
braid. This braid is impregnated to enhance abrasion
resistance and reduce fraying. The insulated single
conductors are laid parallel and covered with another
layer of woven glass. A final impregnation is then applied
to the glass.
For higher temperatures, consider SERIES 321.
Performance Capabilities
• Continuous temperature rating: 900°F (482°C)
• Fiberglass braided yarn insulation
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Heat treating
• Oven
• General use
Specifications
Continuous use temperature
• 900°F (482°C)
Single use temperature
• 1000°F (540°C)
Resin retained to 400°F (204°C)
Resistance properties
• Moisture: Good
• Chemical: Good
• Abrasion: Fair
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T Type E
Solid Standard K20-1-304* J20-1-304* T20-1-304 E20-1-304
20
Thermocouple
24
Extension 20 Solid Standard
* These constructions stocked with a stainless steel overbraid (order overbraid by adding “-S” in front of construction type (i.e. K20-1-S-304).
Note: Bolded products are stocked.
Solid Special K20-2-304 J20-2-304 T20-2-304 E20-2-304
Stranded Standard K20-3-304* J20-3-304* T20-3-304 E20-3-304
Solid Standard K24-1-304 J24-1-304 T24-1-304
Solid Special K24-2-304 J24-2-304 T24-2-304
Stranded Standard K24-3-304 J24-3-304
Wire Specifications
Nominal Insulation Thickness
AWG
24 0.020 (1.508) 0.005 (0.127) 0.006 (0.152) 0.045 x 0.072 (1.14 x 1.83) 7 (10.4)
24 S* (7/32) 0.024 (1.610) 0.005 (0.127) 0.006 (0.152) 0.048 x 0.080 (1.22 x 2.03) 8 (11.9)
20 0.032 (1.813) 0.005 (0.127) 0.006 (0.152) 0.056 x 0.096 (1.42 x 2.44) 9 (13.4)
20 S* (7/28) 0.038 (1.965) 0.006 (0.152) 0.006 (0.152) 0.064 x 0.112 (1.63 x 2.84) 10 (14.9)
* “S” denotes stranded wire: e.g., “20 S (7/28)” is seven strands of 28 gauge wire to make a 20 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
162
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
Fiberglass Braided Thermocouple and Extension
Wire SERIES 304
Ordering Information
Part Number
ASTM E
230
Calibration
③③
AWG
(Continued)
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
3
⑦⑦②②①①
0
4
①①
E=Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③②②
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
5=
Extension grade, solid wire, standard tolerance
6=
Extension grade, solid wire, special tolerance
7=
Extension grade, stranded wire, standard tolerance
8=
Extension grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
163
SERV-RITE Wire
Thermocouple Wire
Fiberglass Wrapped Thermocouple and
Extension Wire SERIES 305
SERIES 305 is specifically constructed for light duty
applications where size is a critical factor. Single
conductors are insulated using a specialized yarn
wrapped around the conductors in layers. Yarn is then
impregnated to add abrasion resistance and enhance
electrical properties. The insulated single conductors are
then laid parallel and covered with a layer of braided
glass. A final impregnation is applied to the braid.
For higher temperature applications, use SERIES 321.
Performance Capabilities
• Continuous temperature rating: 900°F (482°C)
• Fiberglass braided yarn insulation
• Yarn wrapped conductors for superior coverage on
small gauge wires
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Heat treating
• Oven
• General use
Specifications
Continuous use temperature
• 900°F (482°C)
Single use temperature
• 1000°F (540°C)
Resin retained to 400°F (204°C)
Resistance properties
• Moisture: Good
• Chemical: Good
• Abrasion: Fair
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J
Solid Standard K24-1-305 J24-1-305
Solid Special K24-2-305 J24-2-305
Solid Standard K28-1-305 J28-1-305
Solid Special K28-2-305 J28-2-305
Solid Standard K30-1-305 J30-1-305
Solid Special K30-2-305 J30-2-305
Thermocouple
Note: Bolded products are stocked.
24
28
30
Wire Specifications
Nominal Insulation Thickness
AWG
30 0.010 (0.254) 0.005 (0.127) 0.008 (0.203) 0.036 x 0.056 (0.914 x 1.42) 3 (4.5)
28 0.013 (0.320) 0.005 (0.127) 0.008 (0.203) 0.040 x 0.062 (1.02 x 1.57) 3 (4.5)
24 0.020 (0.508) 0.005 (0.127) 0.006 (0.152) 0.042 x 0.072 (1.07 x 1.83) 7 (10.4)
24 S* (7/32) 0.024 (0.610) 0.005 (0.127) 0.006 (0.152) 0.048 x 0.080 (1.22 x 2.03) 8 (11.9)
20 0.032 (0.813) 0.005 (0.127) 0.006 (0.152) 0.054 x 0.096 (1.37 x 2.44) 9 (13.4)
20 S* (7/28) 0.038 (0.965) 0.005 (0.127) 0.006 (0.152) 0.060 x 0.108 (1.52 x 2.74) 10 (14.9)
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
164
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
Fiberglass Wrapped Thermocouple and
Extension Wire SERIES 305
Ordering Information
Part Number
ASTM E
230
Calibration
③③
AWG
④④
Conductor
Type/
Tolerance
(Continued)
⑤⑤
⑤⑤
3
⑥⑥
0
⑦⑦②②①①
5
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③
②②
30 =
30 gauge solid
28 =
28 gauge solid
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
5=
Extension grade, solid wire, standard tolerance
6=
Extension grade, solid wire, special tolerance
7=
Extension grade, stranded wire, standard tolerance
8=
Extension grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
165
SERV-RITE Wire
Thermocouple Wire
High-Temperature Fiberglass Twisted
Thermocouple Wire SERIES 314
The SERIES 314 is an economical construction for
general, high temperature applications. The braided high
temperature yarn is applied in a unique manner that
allows SERIES 314 to be competitively priced with other
fiberglass constructions. It produces a finished wire that
performs at temperatures to 1600°F (870°C).
The conductors are insulated with braided, high strength
fiberglass and impregnated to improve abrasion
resistance. The impregnation is tinted to impart color
coding to primary insulations. The insulated single
conductors are then twisted together to yield a
construction flexible enough for almost any application.
Performance Capabilities
• Continuous temperature rating: 1300°F (705°C)
• Fiberglass braided yarn insulation
• Twisted design has no jacket
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Heat treating
• Aluminum stress relieving
• Steel annealing
Specifications
Continuous use temperature
• 1300°F (705°C)
Single use temperature
• 1600°F (870°C)
Resin retained to 400°F (204°C)
Resistance properties
• Moisture: Good
• Chemical: Good
• Abrasion: Good
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J
Thermocouple
20
24
Note: Bolded products are stocked.
Solid Standard K20-1-314 J20-1-314
Solid Special K20-2-314 J20-2-314
Solid Standard K24-1-314 J24-1-314
Solid Special K24-2-314 J24-2-314
Wire Specifications
Nominal Conductor
AWG
24 0.020 (0.508) 0.015 (0.381) 0.100 (2.54) 6 (8.9)
20 0.032 (0.965) 0.015 (0.381) 0.124 (3.15) 10 (14.9)
18 0.040 (1.02) 0.018 (0.457) 0.152 (3.56) 16 (23.8)
16 0.051 (1.29) 0.018 (0.457) 0.174 (4.42) 21 (31.3)
Nominal Conductor Size
in. (mm)
Insulation Thickness
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
Ordering Information
Part Number
ASTM E
230
Calibration
①①
J=
Type J
K=
Type K
③③②②
24 =
24 gauge solid
20 =
20 gauge solid
16 =
16 gauge solid
②②①①
AWG
③③
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
3
ASTM E 230 Calibration
AWG
⑦⑦
1
4
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
166
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
High-Temperature Braided Fiberglass
Thermocouple Wire SERIES 321
The addition of color coding and impregnation to the
high temperature fiberglass make this wire the next logical
step for systems which exceed temperature capabilities of
the standard glass insulated series.
Each conductor is covered with a color coded, high
temperature fiberglass braid. This braid is then
impregnated to enhance abrasion resistance and
reduce fraying. The insulated conductors are laid
parallel and covered with another braid of high
temperature fiberglass and impregnation.
Performance Capabilities
• Continuous temperature rating: 1300°F (705°C)
• Heavy fiberglass braided yarn insulation
• Twisted design has no jacket
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Heat treating
• Aluminum and steel
Specifications
Continuous use temperature
• 1300°F (705°C)
Single use temperature
• 1600°F (870°C)
Resin retained to 400°F (204°C)
Resistance properties
• Moisture: Good
• Chemical: Good
• Abrasion: Good
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J
Thermocouple
20
24
* Calibrated from 200 to 2200°F (93 to 1204°C), every 200°F (93°C). Only available in this construction.
Bolded products are stocked.
Solid Standard K20-1-321 J20-1-321
Solid Special K20-2-321 J20-2-321
Solid Special J20-2-321-CAL*
Solid Standard K24-1-321 J24-1-321
Solid Special K24-2-321 J24-2-321
Wire Specifications
Nominal Insulation Thickness
AWG
24 0.020 (0.508) 0.015 (0.381) 0.010 (0.254) 0.072 x 0.120 (1.83 x 3.05) 10 (14.9)
20 0.032 (0.965) 0.015 (0.381) 0.010 (0.254) 0.082 x 0.140 (2.08 x 3.56) 13 (19.4)
18 0.040 (1.02) 0.015 (0.381) 0.010 (0.254) 0.090 x 0.156 (2.29 x 3.96) 18 (26.8)
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
Ordering Information
Part Number
ASTM E
230
Calibration
①①
J=
Type J
K=
Type K
N=
Type N
③③②②
24 =
24 gauge solid
20 =
20 gauge solid
②②①①
AWG
③③
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤
3
ASTM E 230 Calibration
AWG
⑥⑥
2
⑦⑦
1
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
167
SERV-RITE Wire
Thermocouple Wire
High-Temperature Ceramic Fiber
Thermocouple Wire SERIES 350 and 355
The SERIES 350 uses the ultimate high-temperature
flexible insulating system. The ceramic fiber yarn’s upper
temperature limit often exceeds the melting point of the
material it insulates. Because this insulation has no
binders or impregnations, it may “flower” when stripped.
When an application requires flexible insulation, while
pushing Type K or Type N to extreme limits, ceramic fiber
insulation is the only choice.
Watlow supplies standard SERIES 350 without color
coding or impregnations to minimize contaminating the
pure ceramic fiber yarn. Because this insulation has no
binders or impregnations, it may “flower” when stripped.
Laboratory testing indicates impregnation can decrease
the upper use temperature by as much as 1000°F
(540°C).
The SERIES 355 construction is a cost-effective, medium
insulation build of the popular SERIES 350 heavy-duty
construction.
If application temperatures exceed SERIES 350
construction, specify XACTPAK®mineral-insulated,
metal-sheathed cable.
Applications
• Heat treating
• Oven and furnace survey
• Load thermocouple
Specifications
Continuous use temperature
• 2200°F (1205°C)
Single use temperature
• 2600°F (1430°C)
Resistance properties
• Moisture: Fair
• Chemical: Good
• Abrasion: Good
Performance Capabilities
• Continuous temperature rating: 1205°C (2200°F)
• Ceramic fiber braided yarn insulation
• Available with an optional metallic overbraid for
additional abrasion resistance
Popular Constructions
Grade AWG Wire Type Insulation Limits of Error Type K
Solid Heavy Standard K20-1-350
Solid Heavy Special K20-2-350
Thermocouple 20
* Calibrated from 200 to 2200°F (93 to 1204°C), every 200°F (93°C). Only available in this construction.
Bolded products are stocked.
Solid Heavy Special K20-2-350-CAL*
Solid Medium Standard K20-1-355
Solid Medium Special K20-2-355
Wire Specifications
AWG
24
20
16
14
24
20
16
a
SERIES 350, 2SERIES 355
Nominal Conductor Size
in. (mm)
a
a
a
a
2
2
2
0.020 (0.508) 0.016 (0.406) 0.016 (0.406) 0.088 x 0.132 (2.24 x 3.35) 13 (19.4)
0.032 (0.965) 0.016 (0.406) 0.016 (0.406) 0.100 x 0.154 (2.54 x 3.91) 16 (23.8)
0.051 (1.29) 0.016 (0.406) 0.016 (0.406) 0.119 x 0.192 (3.02 x 4.88) 32 (47.7)
0.064 (1.63) 0.016 (0.406) 0.016 (0.406) 0.132 x 0.218 (3.35 x 5.54) 44 (65.6)
0.020 (0.508) 0.012 (0.305) 0.016 (0.406) 0.078 x 0.116 (1.98 x 2.95) 13 (19.4)
0.032 (0.965) 0.012 (0.305) 0.016 (0.406) 0.090 x 0.138 (2.29 x 3.50) 16 (23.8)
0.051 (1.29) 0.012 (0.305) 0.016 (0.406) 0.111 x 0.176 (2.82 x 4.47) 32 (47.7)
168
Nominal Insulation Thickness
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
High-Temperature Ceramic Fiber
Thermocouple Wire SERIES 350 and 355
Ordering Information
Part Number
ASTM E
230
Calibration
③③
AWG
④④⑥⑥
Conductor
Type/
Tolerance
⑤⑤
⑦⑦②②①①
Insulation
Type
(Continued)
①①
K=
N=
③③
②②
24 =
20 =
16 =
14 =
Type K
Type N
20 gauge solid
20 gauge solid
16 gauge solid
14 gauge solid
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
⑤⑤⑥⑥
⑦⑦
350=
Heavy build
355=
Medium build
Note: Minimum order sizes apply for non-stock constructions.
Conductor/Type Tolerance
Insulation Type
WATLOW
®
169
SERV-RITE Wire
Thermocouple Wire
Polyvinyl Chloride (PVC) Insulated Extension
Wire SERIES 502
SERIES 502 is an economical wire that has PVC for the
primary and duplex insulation.
The primary and duplex insulation is PVC. It yields a
construction that is inexpensive and performs
continuously at temperatures up to 220°F (105°C).
SERIES 502 is often used in conduit and wiring trays
where its flexibility allows for easy installation. It can be
easily stripped using hand tools or mechanical methods.
Performance Capabilities
• Continuous temperature rating: 220°F (105°C)
• Flexible PVC plastic insulation
• Available with an optional metallic overbraid for
additional abrasion resistance
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T Type E Type S
16
Extension
Note: Bolded products are stocked.
20
24
Solid Standard K16-5-502 J16-5-502
Stranded Standard K16-7-502 J16-7-502
Solid Standard K20-5-502 J20-5-502 T20-5-502 E20-5-502 S20-5-502
Stranded Standard K20-7-502 J20-7-502 T20-7-502
Solid Standard K24-5-502 J24-5-502 T24-5-502
Stranded Standard K24-7-502 J24-7-502 T24-7-502
Applications
• General use extension wire
Specifications
Continuous use temperature
• 220°F (105°C)
Single use temperature
• 220°F (105°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Excellent
Wire Specifications
Nominal Insulation Thickness
AWG
24 0.020 (0.508) 0.015 (0.381) 0.015 (0.381) 0.080 x 0.130 (2.03 x 3.30) 10 (14.9)
24 S* (7/32) 0.024 (0.610) 0.015 (0.381) 0.015 (0.381) 0.084 x 0.138 (2.13 x 3.51) 11 (16.4)
20 0.032 (0.813) 0.015 (0.381) 0.015 (0.381) 0.092 x 0.154 (2.34 x 3.91) 14 (20.9)
20 S* (7/28) 0.038 (0.965) 0.015 (0.381) 0.015 (0.381) 0.098 x 0.166 (2.49 x 4.22) 16 (23.8)
16 0.051 (1.29) 0.020 (0.508) 0.020 (0.508) 0.131 x 0.222 (3.33 x 5.64) 28 (41.7)
16 S* (7/24) 0.060 (1.52) 0.020 (0.508) 0.020 (0.508) 0.140 x 0.240 (3.56 x 6.10) 30 (44.7)
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
170
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
PVC Insulated Extension Wire SERIES 502 (Continued)
Ordering Information
Part Number
①①
ASTM E
230
Calibration
③③
AWG
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
5
⑦⑦②②
0
2
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③②②
24 =
24 gauge solid or 24 gauge stranded (7/28)
20 =
20 gauge solid or 20 gauge stranded (7/28)
16 =
16 gauge solid or 16 gauge stranded (7/24)
ASTM E 230 Calibration
AWG
④④
5=
Extension grade, solid wire, standard tolerance
6=
Extension grade, solid wire, special tolerance
7=
Extension grade, stranded wire, standard tolerance
8=
Extension grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
171
SERV-RITE Wire
Thermocouple Wire
PVC Insulated “RIPCORD” SERIES 505
The SERIES 505 is the most economical wire produced.
Unlike some competitive “ripcord” type constructions
which use only a stripe to establish polarity, SERIES 505
single conductors are fully color coded. The conductors
are individually insulated with the proper colored PVC and
fused into “ripcord” using a proprietary process.
Insulated conductors can be easily separated by hand
once the bond between conductors has been slit. As with
other PVC insulated products, SERIES 505 lends itself
well to both manual and mechanical stripping methods.
Performance Capabilities
• Continuous temperature rating: 220°F (105°C)
• Flexible PVC plastic insulation
• “Ripcord” peelable construction
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Laboratory
• Test stand
• Automotive
Specifications
Continuous use temperature
• 220°F (105°C)
Single use temperature
• 220°F (105°C)
Resistance properties
• Moisture: Excellent
• Chemical: Good
• Abrasion: Good
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T
Thermocouple 24
Note: Bolded products are stocked.
Solid Standard
Solid Special
K24-1-505 J24-1-505 T24-1-505
K24-2-505 J24-2-505 T24-2-505
Wire Specifications
Nominal Conductor
AWG
26 0.016 (0.406) 0.015 (0.381) 0.046 x 0.088 (1.17 x 2.24) 4 (6.0)
24 0.020 (0.508) 0.015 (0.381) 0.050 x 0.096 (1.27 x 2.44) 5 (7.5)
Nominal Conductor Size
in. (mm)
Insulation Thickness
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
Ordering Information
Part Number
ASTM E
230
Calibration
①①
J=
Type J
K=
Type K
T=
Type T
③③②②
26 =
26 gauge solid
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
③③
AWG
④④⑦⑦②②①①
Conductor
Type/
Tolerance
⑤⑤
⑤⑤
5
ASTM E 230 Calibration
AWG
⑥⑥
0
5
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
172
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
Small Gauge
Fluorinated Ethylene Propylene
(FEP) Insulated SERIES 506
The SERIES 506 is the smallest standard insulated wire
construction. The thin FEP
duplex insulation yields a construction that can operate
safely at temperatures far beyond common PVC and
nylon insulations.
The SERIES 506 is fully color coded for easy installation.
Its small size allows use in high density circuits.
Response time is minimized by small diameter
conductors. For larger diameter gauge sizes than
#28, specify SERIES 507.
Performance Capabilities
• Continuous temperature rating: 400°F (204°C)
• Flexible FEP plastic insulation
• Thin insulation wall for a compact construction
• Available with an optional metallic overbraid for
additional abrasion resistance
wall on both primary and
Applications
• Laboratory
• Test stand
• Industrial equipment testing
Specifications
Continuous use temperature
• 400°F (204°C)
Single use temperature
• 500°F (260°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Excellent
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T
28 Solid Special
Thermocouple
Note: Bolded products are stocked.
30 Solid Special
36 Solid Special
K28-2-506 J28-2-506 T28-2-506
K30-2-506 J30-2-506 T30-2-506
K36-2-506 J36-2-506 T36-2-506
Wire Specifications
Nominal Insulation Thickness
AWG
36 0.005 (0.127) 0.005 (0.127) 0.005 (0.127) 0.025 x 0.040 (0.635 x 1.02) 2 (3.0)
32 0.008 (0.203) 0.005 (0.127) 0.005 (0.127) 0.028 x 0.046 (0.711 x 1.17) 2 (3.0)
30 0.010 (0.254) 0.005 (0.127) 0.005 (0.127) 0.030 x 0.050 (0.762 x 1.27) 3 (4.5)
28 0.013 (0.330) 0.005 (0.127) 0.005 (0.127) 0.033 x 0.056 (0.838 x 1.42) 3 (4.5)
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
Ordering Information
Part Number
ASTM E
230
Calibration
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
WATLOW
③③
②②①①
AWG
®
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
5
ASTM E 230 Calibration
⑦⑦
0
6
③③②②
36 =
36 gauge solid
30 =
30 gauge solid
28 =
28 gauge solid
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
AWG
173
SERV-RITE Wire
Thermocouple Wire
FEP Insulated Thermocouple and
Extension Wire SERIES 507
The SERIES 507 is the most economical fluoroplastic
insulated wire. Individual conductors are coated with a
layer of color coded FEP. The insulated conductors are
then parallel duplexed with an additional layer of color
coded FEP. The finished construction has a continuous
temperature rating of 400°F (204°C). Abrasion, moisture
and chemical resistance exceed most other insulations.
This construction is widely used when pulling long
lengths of wire through conduit. FEP’s low friction
coefficient and abrasion resistance are suited for
these applications.
For higher abrasion resistance consider SERIES 514
Tefzel®insulated constructions.
For higher temperatures specify SERIES 508.
Performance Capabilities
• Continuous temperature rating: 400°F (204°C)
• Flexible FEP plastic insulation
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• General use extension wire
Specifications
Continuous use temperature
• 400°F (204°C)
Single use temperature
• 500°F (260°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Excellent
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T Type E Type S
Extension
Thermocouple
Note: Bolded products are stocked.
20 Solid Standard K20-5-507 J20-5-507 T20-5-507 E20-5-507 S20-5-507
24 Solid Standard S24-5-507
Solid Standard K20-1-507 J20-1-507 T20-1-507 E20-1-507
20
24
Stranded Standard K20-3-507 J20-3-507 T20-3-507 E20-3-507
Solid Special K20-2-507 J20-2-507 T20-2-507 E20-2-507
Solid Standard K24-1-507 J24-1-507 T24-1-507 E24-1-507
Stranded Standard K24-3-507 J24-3-507 T24-3-507 E24-3-507
Solid Special K24-2-507 J24-2-507 T24-2-507 E24-2-507
Wire Specifications
Nominal Insulation Thickness
AWG
24 0.020 (0.508) 0.008 (0.203) 0.010 (0.254) 0.056 x 0.096 (1.42 x 2.44) 8 (11.9)
24 S* (7/32) 0.024 (0.610) 0.008 (0.203) 0.010 (0.254) 0.060 x 0.104 (1.52 x 2.64) 9 (13.4)
22 0.025 (0.635) 0.008 (0.203) 0.010 (0.254) 0.061 x 0.106 (1.55 x 2.69) 10 (14.9)
22 S* (7/30) 0.030 (0.762) 0.008 (0.203) 0.010 (0.254) 0.066 x 0.116 (1.68 x 2.95) 11 (16.4)
20 0.032 (0.813) 0.008 (0.203) 0.010 (0.254) 0.068 x 0.120 (1.73 x 3.05) 12 (17.9)
20 S* (7/28) 0.038 (0.965) 0.008 (0.203) 0.010 (0.254) 0.074 x 0.132 (1.88 x 3.35) 14 (20.9)
18 0.040 (1.02) 0.008 (0.203) 0.010 (0.254) 0.076 x 0.136 (1.93 x 3.45) 18 (26.8)
18 S* (7/26) 0.048 (1.22) 0.008 (0.203) 0.010 (0.254) 0.084 x 0.152 (2.13 x 3.86) 20 (29.8)
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
174
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
FEP Insulated Thermocouple and Extension
Wire SERIES 507
Ordering Information
Part Number
③③
ASTM E
230
Calibration
②②①①
AWG
(Continued)
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
5
0
⑦⑦
7
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③②②
24 =
24 gauge solid or 24 gauge stranded (7/32)
22 =
22 gauge solid or 22 gauge stranded (7/30)
20 =
20 gauge solid or 20 gauge stranded (7/28)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
5=
Extension grade, solid wire, standard tolerance
6=
Extension grade, solid wire, special tolerance
7=
Extension grade, stranded wire, standard tolerance
8=
Extension grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
175
SERV-RITE Wire
Thermocouple Wire
TFE Insulated SERIES 508
The primary and duplex insulation of SERIES 508 is fused
TFE tape which is spirally applied to the conductor and
heated. This process, called sintering, forms the tape
into a homogeneous layer. When sintered, the tape
exhibits all of the advantages of extruded TFE insulation,
while eliminating the concentricity problems associated
with TFE extrusions.
The SERIES 508 is fully color coded and capable of
continuous operation in excess of 500°F (260°C).
Because the fusing process causes the duplex tape to
fuse with the primary insulation, SERIES 508 is not
recommended for applications where it is necessary
to remove the outer tape while leaving the primary
insulation intact.
Performance Capabilities
• Continuous temperature rating: 500°F (260°C)
• Fused TFE tape insulation
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Aircraft
• Petroleum processing
Specifications
Continuous use temperature
• 500°F (260°C)
Single use temperature
• 600°F (315°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Good
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T Type E
Solid Standard K20-1-508 J20-1-508 T20-1-508 E20-1-508
20
Thermocouple
24
Note: Bolded products are stocked.
Stranded Standard K20-3-508 20-3-508 T20-3-508 E20-3-508
Solid Special K20-2-508 J20-2-508 T20-2-508 E20-2-508
Solid Standard K24-1-508 J24-1-508 T24-1-508 E24-1-508
Stranded Standard K24-3-508 J24-3-508 T24-3-508 E24-3-508
Solid Special K24-2-508 J24-2-508 T24-2-508 E24-2-508
Wire Specifications
Nominal Insulation Thickness
AWG
26 0.016 (0.406) 0.006 (0.152) 0.008 (0.203) 0.044 x 0.072 (1.12 x 1.83) 4 (6.0)
24 0.020 (0.508) 0.006 (0.152) 0.008 (0.203) 0.047 x 0.077 (1.19 x 1.95) 5 (7.5)
24 S* (7/32) 0.024 (0.610) 0.006 (0.152) 0.008 (0.203) 0.049 x 0.084 (1.24 x 2.13) 6 (8.9)
20 0.032 (0.813) 0.006 (0.152) 0.008 (0.203) 0.061 x 0.106 (1.55 x 2.69) 11 (16.4)
20 S* (7/28) 0.038 (0.965) 0.006 (0.152) 0.008 (0.203) 0.064 x 0.112 (1.63 x 2.84) 12 (17.9)
18 0.040 (1.02) 0.006 (0.152) 0.008 (0.203) 0.068 x 0.120 (1.73 x 3.05) 16 (23.8)
18 S* (7/26) 0.048 (1.22) 0.006 (0.152) 0.008 (0.203) 0.076 x 0.136 (1.93 x 3.45) 18 (26.8)
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
176
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
TFE Insulated SERIES 508 (Continued)
Ordering Information
Part Number
ASTM E
230
Calibration
②②①①
AWG
③③
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
5
0
⑦⑦
8
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③
②②
26 =
26 gauge solid
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
177
SERV-RITE Wire
Thermocouple Wire
FEP Insulated and Shielded Thermocouple
and Extension Wire SERIES 509
The SERIES 509 was developed specially for use with
microprocessor-based systems.
The conductors are insulated with color coded FEP. They
are then twisted with a copper drain wire. An aluminized
polyester tape is wrapped around the conductors and
drain wire and then FEP is applied.
The finished construction can withstand temperatures in
excess of 400°F (204°C). Twisted conductors minimize
electromagnetic interference (EMI) and the shield tape
eliminates most problems associated with AC “noise” in
the sensing circuit.
Performance Capabilities
• Continuous temperature rating: 400°F (204°C)
• Flexible FEP plastic insulation
• Twisted and shielded construction to reduce electrical
noise interference
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• General use extension wire
Specifications
Continuous use temperature
• 400°F (204°C)
Single use temperature
• 500°F (260°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Excellent
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T Type E Type S
16
Extension
20
20
Thermocouple
24
Note: Bolded products are stocked.
Solid Standard K16-5-509 J16-5-509
Stranded Standard K16-7-509 J16-7-509
Solid Standard K20-5-509 J20-5-509 T20-5-509 E20-5-509 S20-5-509
Stranded Standard K20-7-509 J20-7-509 T20-7-509
Solid Standard K20-1-509 J20-1-509 T20-1-509
Solid Special K20-2-509 J20-2-509 T20-2-509
Solid Standard K24-1-509 J24-1-509 T24-1-509
Stranded Standard K24-3-509 J24-3-509 T24-3-509
Wire Specifications
Nominal Insulation Thickness
AWG
24 0.020 (0.508) 0.008 (0.203) 0.012 (0.305) 0.104 (2.64) 12 (17.9)
24 S* (7/32) 0.024 (0.610) 0.008 (0.203) 0.012 (0.305) 0.112 (2.84) 13 (19.4)
20 0.032 (0.813) 0.008 (0.203) 0.012 (0.305) 0.128 (3.25) 18 (26.8)
20 S* (7/28) 0.038 (0.965) 0.008 (0.203) 0.012 (0.305) 0.140 (3.56) 20 (29.8)
18 0.040 (1.02) 0.008 (0.203) 0.015 (0.381) 0.152 (3.86) 25 (37.3)
18 S* (7/26) 0.048 (1.22) 0.008 (0.203) 0.015 (0.381) 0.168 (4.27) 27 (40.2)
16 0.051 (1.29) 0.008 (0.203) 0.015 (0.381) 0.174 (4.42) 33 (49.2)
16 S* (7/24) 0.060 (1.52) 0.008 (0.203) 0.015 (0.381) 0.192 (4.88) 35 (52.2)
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
178
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
FEP Insulated and Shielded Thermocouple
and Extension Wire SERIES 509
Ordering Information
Part Number
ASTM E
230
Calibration
③③
AWG
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
5
(Continued)
⑦⑦②②①①
0
9
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③②②
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
16 =
16 gauge solid or 16 gauge stranded (7/24)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
5=
Extension grade, solid wire, standard tolerance
6=
Extension grade, solid wire, special tolerance
7=
Extension grade, stranded wire, standard tolerance
8=
Extension grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
179
SERV-RITE Wire
Thermocouple Wire
PVC Insulated and Shielded Thermocouple
and Extension Wire SERIES 510
The SERIES 510 is a PVC insulated, twisted and shielded
construction for systems sensitive to induced voltages
and “noise.”
The conductors are insulated with color coded PVC and
then twisted with a copper drain wire. An aluminized
polyester tape is wrapped around the two conductors
and drain wires to impart 100 percent shielding. Then,
another layer of PVC is applied.
The twisting eliminates most EMI while the shield tape
minimizes AC “noise” in the sensing circuit.
Performance Capabilities
• Continuous temperature rating: 220°F (105°C)
• Flexible PVC plastic insulation
• Twisted and shielded construction to reduce electrical
noise interference
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• General use extension wire
Specifications
Continuous use temperature
• 220°F (105°C)
Single use temperature
• 220°F (105°C)
Resistance properties
• Moisture: Excellent
• Chemical: Good
• Abrasion: Good
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T Type E Type S
16
Extension
Note: Bolded products are stocked.
20
24
Solid Standard K16-5-510 J16-5-510 T16-5-510
Stranded Standard K16-7-510 J16-7-510 T16-7-510
Solid Standard K20-5-510 J20-5-510 T20-5-510 E20-5-510 S20-5-510
Stranded Standard K20-7-510 J20-7-510 T20-7-510
Solid Standard K24-5-510 J24-5-510 T24-5-510
Stranded Standard K24-7-510 J24-7-510 T24-7-510
Wire Specifications
Nominal Insulation Thickness
AWG
24 0.020 (0.508) 0.015 (0.381) 0.020 (0.508) 0.140 (3.56) 13 (19.4)
24 S* (7/32) 0.024 (0.610) 0.015 (0.381) 0.020 (0.508) 0.148 (3.76) 14 (20.9)
20 0.032 (0.813) 0.015 (0.381) 0.020 (0.508) 0.164 (4.17) 22 (32.8)
20 S* (7/28) 0.038 (0.965) 0.015 (0.381) 0.020 (0.508) 0.176 (4.47) 24 (35.8)
18 0.040 (1.02) 0.020 (0.508) 0.020 (0.508) 0.200 (5.08) 30 (44.7)
18 S* (7/26) 0.048 (1.22) 0.020 (0.508) 0.020 (0.508) 0.216 (5.49) 32 (47.7)
16 0.051 (1.29) 0.020 (0.508) 0.020 (0.508) 0.222 (5.64) 39 (58.1)
16 S* (7/24) 0.060 (1.52) 0.020 (0.508) 0.020 (0.508) 0.240 (6.10) 41 (61.1)
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
180
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
PVC Insulated and Shielded Thermocouple
and Extension Wire SERIES 510
Ordering Information
Part Number
ASTM E
230
Calibration
③③
AWG
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
5
(Continued)
⑦⑦②②①①
1
0
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③②②
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
16 =
16 gauge solid or 16 gauge stranded (7/24)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
5=
Extension grade, solid wire, standard tolerance
6=
Extension grade, solid wire, special tolerance
7=
Extension grade, stranded wire, standard tolerance
8=
Extension grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
181
SERV-RITE Wire
Thermocouple Wire
Polyimide Insulated and Twisted SERIES 511
SERIES 511 is the most economical polyimide taped
construction. Polyimide film applied to the conductors is
considered to be the ultimate “soft” insulation. The tape
maintains its strength at temperatures up to 600°F
(315°C). The FEP laminate serves as a moisture barrier
and allows the tape to fuse with itself. The finished
construction will not unravel when cut.
SERIES 511 conductors are wrapped with the polyimide
tape which is fused to itself. Each conductor is color
coded with a colored thread under the tape. The
insulated conductors are twisted into a duplex
construction to eliminate the overall duplex insulation
and minimize cost.
Performance Capabilities
• Continuous temperature rating: 600°F (315°C)
• Polyimide fused tape insulation
• Twisted design has no outer jacket
• Colored tracer used to indicate calibration type
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Aerospace
• Petrochemical
• Plastics
Specifications
Continuous use temperature
• 600°F (315°C)
Single use temperature
• 800°F (430°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Excellent
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J
Thermocouple
Note: Bolded products are stocked.
20
24
Solid Standard
Solid Special
Solid Standard
Solid Special
K20-1-511 J20-1-511
K20-2-511 J20-2-511
K24-1-511 J24-1-511
K24-2-511 J24-2-511
Wire Specifications
Nominal Conductor
AWG
30 0.010 (0.254) 0.004 (0.102) 0.040 (1.02) 3 (4.5)
24 0.020 (0.508) 0.005 (0.127) 0.060 (1.52) 4 (6.0)
24 S* (7/32) 0.024 (0.610) 0.005 (0.127) 0.068 (1.73) 5 (7.5)
20 0.032 (0.813) 0.005 (0.127) 0.084 (2.13) 8 (11.9)
20 S* (7/28) 0.038 (0.965) 0.005 (0.127) 0.094 (2.39) 9 (13.4)
Note: FEP laminate melts at approximately 260°C (500°F).
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Insulation Thickness
in. (mm)
Nominal Overall
Size
in (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
182
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
Polyimide Insulated and Twisted SERIES 511
(Continued)
Ordering Information
Part Number
ASTM E
230
Calibration
②②①①
AWG
③③
④④
Conductor
Type/
Tolerance
⑤⑤
⑤⑤⑥⑥
5
⑦⑦
1
1
①①
J=
Type J
K=
Type K
T=
Type T
③③②②
30 =
30 gauge solid
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
16 =
16 gauge solid
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
183
SERV-RITE Wire
Thermocouple Wire
Polyimide Insulated SERIES 512
The SERIES 512 is a heavier duty version of SERIES 511
construction, using the same polyimide insulation. Color
coding is accomplished using the same colored thread
“tracers.” The SERIES 512 has a duplex insulation of
polyimide tape. The extra wall of tape yields a
construction with increased abrasion resistance.
For higher temperature requirements, choose one of our
fiberglass insulated wires.
For improved abrasion resistance, and easier color
identification of conductors, specify SERIES 513 when
contacting the factory.
Performance Capabilities
• Continuous temperature rating: 600°F (315°C)
• Polyimide fused tape insulation
• Colored tracer used to indicate calibration type
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• Aerospace
• Petrochemical
• Plastics
Specifications
Continuous use temperature
• 600°F (315°C)
Single use temperature
• 800°F (430°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Excellent
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J
Solid Standard K20-1-512 J20-1-512
20
Thermocouple
24
Note: Bolded products are stocked.
Solid Special K20-2-512 J20-2-512
Stranded Standard K20-3-512 J20-3-512
Solid Standard K24-1-512 J24-1-512
Solid Special K24-2-512 J24-2-512
Wire Specifications
Nominal Insulation Thickness
AWG
30 0.010 (0.254) 0.004 (0.102) 0.005 (0.127) 0.026 x 0.044 (0.660 x 1.18) 3 (4.5)
24 0.020 (0.508) 0.005 (0.127) 0.005 (0.127) 0.036 x 0.064 (0.914 x 1.626) 5 (7.5)
24 S* (7/32) 0.024 (0.610) 0.005 (0.127) 0.005 (0.127) 0.043 x 0.066 (1.092 x 1.676) 6 (8.9)
20 0.032 (0.813) 0.005 (0.127) 0.005 (0.127) 0.048 x 0.088 (1.219 x 2.235) 8 (11.9)
20 S* (7/28) 0.038 (0.965) 0.005 (0.127) 0.005 (0.127) 0.056 x 0.098 (1.42 x 2.490) 9 (13.4)
Note: FEP laminate melts at approximately 260°C (500°F).
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
184
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
Polyimide Insulated SERIES 512 (Continued)
Ordering Information
Part Number
ASTM E
230
Calibration
③③
AWG
④④⑦⑦②②①①
Conductor
Type/
Tolerance
⑤⑤
⑤⑤
5
⑥⑥
1
2
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
T=
Type T
③③②②
30 =
30 gauge solid
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
185
SERV-RITE Wire
Thermocouple Wire
PFA Insulated Thermocouple and
Extension Wire SERIES 516
A relatively new fluoroplastic, perfluoralkoxy (PFA), is the
insulation used for SERIES 516. PFA’s temperature rating
is only slightly less than TFE. However, PFA can be
applied using conventional extrusion techniques. This
produces a smooth finish, as opposed to the spiral
usually associated with TFE tape constructions. This is
important in the foodservice industry where taped
constructions present cleaning problems. The smooth
surface also allows this construction to be pulled through
conduits and cut-outs more easily.
Once each conductor has been coated with a color
coded PFA layer, they are laid parallel and coated again
with PFA.
Performance Capabilities
• Continuous temperature rating: 500°F (260°C)
• Flexible TFE plastic insulation
• Available with an optional metallic overbraid for
additional abrasion resistance
Applications
• General use extension wire
Specifications
Continuous use temperature
• 500°F (260°C)
Single use temperature
• 550°F (290°C)
Resistance properties
• Moisture: Excellent
• Chemical: Excellent
• Abrasion: Good
Popular Constructions
Grade AWG Wire Type Limits of Error Type K Type J Type T Type E
Solid Standard K20-1-516 J20-1-516 T20-1-516 E20-1-516
20
Thermocouple
24
Note: Bolded products are stocked.
Solid Special K20-2-516 J20-2-516 T20-2-516 E20-2-516
Stranded Standard K20-3-516 J20-3-516 T20-3-516 E20-3-516
Solid Standard K24-1-516 J24-1-516 T20-1-516 E24-1-516
Solid Special K24-2-516 J24-2-516 T20-2-516 E24-2-516
Stranded Standard K24-3-516 J24-3-516 T20-3-516 E24-3-516
Wire Specifications
Nominal Insulation Thickness
AWG
36 0.005 (0.127) 0.003 (0.076) 0.003 (0.076) 0.017 x 0.028 (0.432 x 0.711) 3.0 (2)
30 0.010 (0.254) 0.003 (0.076) 0.003 (0.076) 0.022 x 0.038 (0.559 x 0.965) 4.5 (3)
24 0.020 (0.508) 0.008 (0.203) 0.010 (0.254) 0.056 x 0.092 (1.42 x 2.34) 11.9 (8)
24 S* (7/32) 0.024 (0.610) 0.008 (0.203) 0.010 (0.254) 0.060 x 0.100 (1.52 x 2.54) 13.4 (9)
20 0.032 (0.813) 0.008 (0.203) 0.010 (0.254) 0.068 x 0.116 (1.73 x 2.95) 17.9 (12)
20 S* (7/28) 0.038 (0.965) 0.008 (0.203) 0.010 (0.254) 0.074 x 0.128 (1.88 x 3.25) 20.9 (14)
* “S” denotes stranded wire: e.g., “24 S (7/32)” is seven strands of 32 gauge wire to make a 24 gauge stranded conductor.
Nominal Conductor Size
in. (mm)
Conductor
in. (mm)
Overall
in. (mm)
Nominal Overall
Size
in. (mm)
Approximate
Shipping Weight
lbs/1000 ft (kg/km)
186
WATLOW
®
SERV-RITE Wire
Thermocouple Wire
PFA Insulated Thermocouple and
Extension Wire SERIES 516
Ordering Information
Part Number
ASTM E
230
Calibration
②②①①
AWG
③③
④④
Conductor
Type/
Tolerance
(Continued)
⑤⑤
⑤⑤
5
⑥⑥
1
⑦⑦
6
①①
E=
Type E
J=
Type J
K=
Type K
N=
Type N
S=
Type S
T=
Type T
③③②②
36 =
36 gauge solid
30 =
30 gauge solid
24 =
24 gauge solid or 24 gauge stranded (7/32)
20 =
20 gauge solid or 20 gauge stranded (7/28)
ASTM E 230 Calibration
AWG
④④
1=
Thermocouple grade, solid wire, standard tolerance
2=
Thermocouple grade, solid wire, special tolerance
3=
Thermocouple grade, stranded wire, standard tolerance
4=
Thermocouple grade, stranded wire, special tolerance
5=
Extension grade, solid wire, standard tolerance
6=
Extension grade, solid wire, special tolerance
7=
Extension grade, stranded wire, standard tolerance
8=
Extension grade, stranded wire, special tolerance
Note: Minimum order sizes apply for non-stock constructions.
Conductor Type/Tolerance
WATLOW
®
187
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