Page 1
Thermistors and Thermistor
Probe Assemblies
Precision-Interchangeable Series
To Order
Visit omega.com/on-900_probes for Pricing and Details
Resistance
Dimensions and Description and Model (ohms)
Materials Typical Application Number @ 25°C
ON-901-44004 2252
25 ± 2
ON-901-44005 3000
(1 ±1/16)
13 ± 0.8
(1/2 ±1/32)
ON-901-44007 5000
305 ±25
(12 ±1)
VINYL SHIELDED-JACKETED
MICROPHONE CABLE
ON-901-44006 10,000
ON-901-44008 30,000
ON-901
ON-909-44004 2252
ON-909-44005 3000
12.7 ±0.8
(1/2 ±1/32)
ON-909-44007 5000
INSULATED
CABLE
ON-909-44006 10,000
VINYL
305 ±25
(12 ±1)
THERMISTOR SENSOR &
EPOXY-ENCAPSULATED
CONNECTIONS
STAINLESS STEEL
HOUSING
ON-909-44008 30,000
ON-909
ON-905-44004
ON-906-44004
ON-905-44005
ON-906-44005
ON-905-44007
ON-906-44007
ON-905-44006
ON-906-44006
ON-905-44008
ON-906-44008
ON-910-44004 2252
ON-910-44005 3000
25 ±2
(1 ±1/16)
13 ±0.8
(1/2 ±1/32)
VINYL
SHIELDED-JACKETED
MICROPHONE CABLE
305 ±25
(12 ±1)
STAINLESS STEEL
HOUSING 5.6 (0.220)
7
11 x 5
( ) SLOTS
(6)
EQUALLY SPACED
x
/
16
ON-905, ON-906
14 ±2
11
(7/16)
HEX
(4-1/2 ±1/16)
114 ±2
(9/16 ±1/16)
(5/8 ±1/64)
3
/
16
16 ±0.4
305 ±25
(12 ±1)
POTTING
COMPOUND
16 ±0.4
(5/8 ±1/64)
13 ±0.08
(1/2 ±0.003)
25 ±2
(1 ±1/16)
WHITE
8
(5/16)
MAX.
mm (in)
(3/8 ±.016)
1.6
mm (in)
6 ±1
(1/4 ±1/32)
EPOXYCOATED
THERMISTOR
SENSOR
mm (in)
13 ±1
(1/2 ±1/32)
ON-910-44007 5000
5
/
( )
4
32
DIA. STAINLESS
ON-910-44006 10,000
STEEL CLOSED END TUBE,
THERMISTOR TEMPERATURE
SENSOR MOUNTED IN TIP
ON-910-44008 30,000
ON-910
14.3 (9/16)
25.4
(1)
ø4.0
11.1
(5/32)
(7/16)
ON-920TA
(25/32)
1/8 NPT
ø10.4 (41/100)
19.8
VINYL SHIELDED-JACKETED
MICROPHONE CABLE
1
/
NPT
8
STAINLESS
STEEL FITTING
39.7
(1-9/16)
Vinyl Shielded-Jacketed
Microphone Cable
304.8 ±12.7
(12 ±1/2)
12.7
(1/2)
25.4 ±1.6
(1 ±1/16)
12.7 ±0.8
(1/2 ±1/32)
mm (in)
mm (in)
Vinyl Tip with Shielded-Jacketed
Microphone Cable.
Biological: Ideal for animal and biological
applications in esophageal or rectal temperature
VINYL
COAT
measurement. It is also suitable for use in
geographic and oceanographic applications.
5 (3/16)
Design characteristics present an extremely rugged
DIA.
sensor assembly at a minimum cost.
MAX.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Epoxy Encapsulated Thermistor Sensor in
Stainless Steel Housing with Vinyl Insulated
Leads.
Surface temperature readings: or control and
10 ±4
indication. Ideally suited for applications such as:
heat loss or compressor efficiency measurement
and control studies of piping systems; determining
1
( )
/
16
manifold wall and bearing surface temperatures.
Construction facilitates easy attachment to flat
1
surfaces.
( )
3
/
8
NOM.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Exposed Epoxy Coated Thermistor Sensor
mounted in Open-End Stainless Steel Housing
with Vinyl Shielded Jacketed Microphone Cable.
ON-906 has Economical Plastic Housing.
Air temperature measurement, control and
DIA.
indication: design characteristics offer a perfect
sensor assembly for monitoring gas streams. Ideal
for temperature measurement and control of remote
air readings.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Closed-End Stainless Steel Tube with
Thermistor Sensor Mounted in Tip.
Fitting with Vinyl Shielded-Jacketed
Microphone Cable.
Liquid immersion sensor assembly: rugged
design and closed end construction. Ideally
suited for temperature measurement, control and
indication in fluids. Also for use in a wide variety of
pressurized systems applications.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Closed-End Stainless Steel Tube with
Thermistor Sensor Mounted in Tip.
Fitting with Vinyl Shielded-Jacketed Cable.
Biological: tubular immersion sensor assembly
with detachable mating connector. Used in
temperature measurement and control of animal
apparatus. Also for use in closed vessels with
pressurized systems where detachable leads are
desirable.
Leads:12"
Maximum temperature: 100°C
1
⁄8" NPT
1
⁄8" NPT
ON-920TA-44004
ON-920TA-44005
ON-920TA-44007
ON-920TA-44006
ON-920TA-44008
2,252
3,000
5,000
10,000
30,000
2252
3000
5000
10,000
30,000
D-9
Page 2
To Order
Visit omega.com/on-900_probes for Pricing and Details
Resistance
Dimensions and Description and Model (ohms)
Materials Typical Application Number @ 25°C
ON-930-44004 2252
ON-930-44005 3000
ON-930-44007 5000
13
1
( )
16
4
5
/
( )
32
/
2
8
5
/
( )
ON-930-44006 10,000
ON-930-44008 30,000
ON-930
6 ±1
1
1
/
/
±
( )
4
ON-940-44004 2252
ON-940-44005 3000
32
28 A.W.G.
INSULATED LEADS
ON-940-44007 5000
ON-940-44006 10,000
ON-940-44008 30,000
ON-940
305 ± 25
(12 ±1)
ON-950-44005 3000
ON-950-44007 5000
ON-950-44006 10,000
6 ±1
1
1
/
/
±
( )
4
32
ON-950-44008 30,000
ON-950
38 ±2
ON-960-44005 3000
3.2
ON-960-44007 5000
1
( )
/
8
DIA.
ON-960-44006 10,000
ON-960-44008 30,000
ON-960
ON-970-44005 3000
ON-970-44007 5000
ON-970-44006 10,000
ON-970-44008 30,000
ON-970
Note: OMEGA’s precision interchangeable probes are normally constructed with ±0.2°C interchangeable thermistors. These are Types 44004,
44005, 44007, 44006 and 44008. If assemblies are required with ±0.1°C interchangeable probes, change the portion of the model number
designation to reflect the ±0.1°C thermistor.
Ordering Example: ON-901-44004 becomes ON-901-44033. Additional cost for ±0.1°C interchangeable thermistors. Interchangeable
thermistors with ±0.1°C interchangeability are Types 44033, 44030, 44034, 44031 and 44032.
1
( )
/
1
2
CRIMP
STAINLESS
STEEL
305 ±25
(12 ±1)
4.8
3
/
( )
16
(2) 28 A.W.G.
INSULATED LEADS
305 25
(12 1)
28 A.W.G.
4-SCREW MTG. HOLE
ALUMINIUM
MOLDED HOUSING
STAINLESS
1
±
/
16
14.3
9
/
( )
16
INSULATED LEADS
305 ±25
(12 ±1)
THERMISTOR
28 A.W.G.
INSULATED
LEADS
STEEL
*8-32 UNC-2A
(.020 x 45°)
CHAMFER
1 (.037)
(2) #6-SCREW MTG. HOLES
1
-27 N.P.T.
/
8
4.3 ±.25
6
(.170 ±0.10)
1
/
( )
4
.5 x 45°
305 ± 25
(12 ±1)
28 A.W.G.
INSULATED LEADS
PLASTIC TUBING
127
(5)
5
3
/
( )
16
.045
(1.1)
( ) DIA.
STAINLESS
STEEL
( )
1.6
1
/
( )
16
(.120) MAX
3.2
1
/
8
5
3
/
16
3.0
6
(1 ±.010)
25 ±.25
( )
mm (in)
mm (in)
1
/
( )
4
mm (in)
19
3
( )
/
4
mm (in)
11
7
/
( )
16
mm (in)
Epoxy Encapsulated Thermistor Sensor in
Screw Mounted Aluminum Housing with PFA
Insulated Leads.
Surface sensor assembly: designed for a
variety of temperature measurement and control
applications. It represents a low cost, fast response
unit and lends itself to easy mounting on flat
4
surfaces.
5
/
32
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Encapsulated Thermistor Sensor in Molded
Housing with PFA Insulated Leads.
Insertion sensor assembly: specifically designed
for high reliability, high volume, and low cost
applications where fast time response and small
size are determining factors. The unit is easily
affixed by inserting in a small hole for mounting.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Stainless Steel Housing with
1
⁄4" Hex. Head and
#8-32 NC-2A Threaded Body. Thermistor Sensor
Epoxy Encapsulated in Housing with PFA
Insulated Leads.
Surface sensor assembly: for temperature
measurement and control where design problems
require stability against vibration and shock. The
unit has been designed for temperature control
and measurement problems where low cost and
reliability are crucial.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Closed-End Stainless Steel Tube with
Thermistor Sensor Mounted in Tip. Stainless
Steel Mounting Plate with (2) Two Mounting
Holes Welded to Tube. PFA Insulated Leads.
Air flow sensor assembly: designed to satisfy
the many requirements of air temperaturemeasurement and control in Air Conditioning
systems and equipment cooling systems.
The unit lends itself to easy mounting to
standard metal ducting.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
Stainless Steel Housing with
1
⁄8-#27 NPT Threaded Body. Thermistor Sensor
7
⁄16" Hex. Head and
Epoxy Encapsulated in Housing with PFA
Insulated Leads.
Liquid immersion fluid sensor assembly: ideal
for obtaining temperature measurement and
control readings in pipes or closed vessels within
pressurized systems. Threaded hex. head design
affords greater resistance to shock and vibration
when mounted. Leads 12" standard, other lengths
available, consult factory.
Leads: 300 mm (12")
Maximum temperature: 100°C (212°F)
ON-960-44004 2252
ON-950-44004 2252
ON-970-44004 2252
D
D-10
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