Watlow SERV-RITE User Manual

Proven Capabilities

®

hermocouple wire and thermocouple extension wire

ince 1914, SERV-RITE

S
from Watlow

All SERV-RITE wire is manufactured under rigid quality control. It is
manufactured under ISO 9001 quality standards. Some wire can even be
shipped next day for your convenience.

All testing has National Institute of Standards Technology (NIST), formally
National Bureau of Standards (NBS), 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.

®

have been known for premimum performance and reliability.

t

Watlow provides:

• Same day shipment on hundreds of stock items

• Temperature range capability from -328 to 2200°F
(-200 to 1205°C)

• Superior products and technical support delivered
worldwide

• State-of-the-art, in-house laboratory services including;
calibration, end-to-end uniformity testing, drift testing, base
metal, platinum and standard platinum resistance
thermometer (SPRT) standards with traceability to NIST

• NIST certifications of conformance and calibration

• Multitude of overbraids, wraps and insulations available,
including electrical noise shields and wraps

• Full range of resistance temperature detector (RTD) wire
(not listed in this publication)

• ASTM E 230 tolerances from ±0.9°F (±0.5°C)
or ±0.4 percent

• ISO 17025 accredited lab

Features and Benefits

Type E, J, K, N and T
thermocouple wire

• Fits virtually all applications

Type EX, JX, KX, NX, TX
extension wire

• Matches thermocouple type

Compensation extension wire for
Type R and S thermocouples

• Permits fine tuning of

temperature measuring circuit

Solid or stranded wire
construction

• Meets specific application

requirements

Wide selection of insulation types

• Meets temperature, chemical,

moisture and abrasion resistance
objectives

Color coding

• Allows compliance with United

States, United Kingdom, Germany,
Japan and IEC standards

Select metallic overbraids and

wraps

• Provides enhanced abrasion

resistance

Stock RTD lead wire

• Meets virtually all industrial RTD

applications

SERV-RITE Wire and Cable

Nominal Resistance for Thermocouple Alloys in Ohms per Double Feet at 68°F (20°C)

B and S

Gauge

2 0.258 (6.5) 0.011 0.006 0.009 0.012

4 0.204 (5.2) 0.017 0.009 0.014 0.019

6 0.162 (4.1) 0.028 0.014 0.023 0.030

8 0.129 (3.3) 0.044 0.023 0.036 0.048

10 0.102 (2.6) 0.070 0.036 0.058 0.077

12 0.081 (2.1) 0.111 0.057 0.092 0.123 0.006 0.048

14 0.064 (1.6) 0.177 0.091 0.147 0.195 0.010 0.076

16 0.051 (1.3) 0.281 0.145 0.233 0.310 0.016 0.120

18 0.040 (1.0) 0.453 0.234 0.376 0.500 0.025 0.194

20 0.032 (0.8) 0.709 0.367 0.589 0.783 0.040 0.304

22 0.025 (0.7) 1.129 0.584 0.937 1.245 0.063 0.483

24 0.020 (0.5) 1.795 0.928 1.490 1.980 0.100 0.768

26 0.016 (0.4) 2.853 1.476 2.369 3.148 0.159 1.221

28 0.013 (0.3) 4.537 2.347 3.767 5.006 0.253 1.942

30 0.010 (0.3) 7.214 3.731 5.990 7.960 0.402 3.088

32 0.008 (0.2) 11.470 5.933 9.524 12.656 0.639 4.910

34 0.006 (0.2) 18.239 9.434 15.145 20.126 1.016 7.808

36 0.005 (0.1) 29.000 15.000 24.080 32.000 1.615 12.415

14 Stranded 0.076 (1.9) 0.161 0.083 0.134 0.178 0.009 0.069

16 Stranded 0.060 (1.5) 0.256 0.133 0.213 0.283 0.014 0.110

18 Stranded 0.048 (1.2) 0.408 0.211 0.338 0.450 0.023 0.174

20 Stranded 0.038 (1.0) 0.648 0.335 0.538 0.715 0.036 0.277

22 Stranded 0.030 (0.8) 1.031 0.533 0.856 1.137 0.057 0.441

24 Stranded 0.024 (0.6) 1.639 0.848 1.361 1.808 0.091 0.701

Diameter

in. (mm) E J K N RX, SX T

Conductor Size

B and S

Gauge

14 0.064 (1.6) 0.076 (1.9) 7 22

16 0.051 (1.3) 0.060 (1.5) 7 24

18 0.040 (1.0) 0.048 (1.2) 7 26

20 0.032 (0.8) 0.038 (1.0) 7 28

22 0.025 (0.6) 0.030 (0.8) 7 30

24 0.020 (0.5) 0.024 (0.6) 7 32

26 0.016 (0.4)

28 0.013 (0.3)

30 0.010 (0.3)

32 0.008 (0.2)

34 0.006 (0.2)

36 0.005 (0.1)

Solid Diameter

in. (mm)

Stranded Diameter

in. (mm) Number of Strands Stranding Gauge

1