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Fine Gage Bare Wire Thermocouple Elements, J, K, T, E, N, R & S

$60.24

Item# COCO-020-36

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $60.24
10-24 $57.23
25-99 $54.22
100-499 $51.20
500-999 $48.19
1000+ $45.18

In stock

Lead Time (If not in stock): 3 weeks
Fine Gage Bare Wire Thermocouple Elements, J, K, T, E, N, R & S COCO-020-36 COCO-020-36
  • Small Size, Fast Response
  • Diameters down to .002'
  • High Accuracy
  • Pin-Point Measurements

COCO-020-36 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Cable Length
Additional Features
Nominal Resistance
Accuracy
Number of Wires
Pack Size
Wire Gauge
Application
Resistance or Output Type
Electrical Connection Type
Maximum Temperature Measurement
Minimum Temperature Measurement
Category
Junction Type
Additional Feature
Termination Connection Type


  • Measurement Units °C
  • Measurement Type Air/Gas Temperature
ANSI Symbol
J Iron/Constantan     N OMEGA-P™, OMEGA-N™
K CHROMEGA™/ALOMEGA™     R Pt 13% Rh/Pt
T Copper/Constantan     S Pt 10% Rh/Pt
E CHROMEGA™/Constantan     B Pt 6% Rh/Pt 30% Rh


Table 1

Maximum Service Temperature
Thermocouple
Type
0.13 mm
(0.005")
0.38 mm
(0.015")
0.51 mm
(0.020")
0.81 mm
0.032
J**
K
N
T
E
R,S
B
315°C (600°F)
593°C (1100°F)
593°C (1100°F)
149°C (300°F)
315°C (600°F)
-
-
371°C (700°F)
871°C (1600°F)
871°C (1600°F)
204°C (400°F)
426°C (800°F)
-
-
371°C (700°F)
871°C (1600°F)
871°C (1600°F)
204°C (400°F)
426°C (800°F)
1450°C (2642°F)
1700°C (3092°F)
482°C (900°F)
982°C (1800°F)
982°C (1800°F)
260°C (500°F)
593°C (1100°F)
1450°C (2642°F)
1700°C (3092°F)
Table 1 lists maximum service temperatures for long term exposures of bare wire thermocouples. For very short exposure times, temperatures of the fine gage thermocouples can be as high as the permissible temperatures for the 0.8 mm (0.032") diameter thermocouples.
** Do not expose to oxidizing atmospheres.


Table 2

Response Time *
Wire Size
mm (inches)
Still Air
427°C/38°C
800°F/100°F
60 ft./sec Air
427°C/38°C
800°F/100°F
Still H2O
93°C/38°C
200°F/100°F
0.025 (0.001)
0.125 (0.005)
0.381 (0.015)
0.75 (0.032)
0.05 sec
1.0 sec
10.0 sec
40.0 sec
0.004 sec
0.08 sec
0.80 sec
3.2 sec
0.002 sec
0.04 sec
0.40 sec
1.6 sec
*The time constant is defined as the time required to reach 63.2% of an instantaneous temperature change. The data for Table 2 are obtained by measuring the time required for a Type J fine gage thermocouple to reach 63.2% of its final temperature when its junction is alternately exposed to two different temperature levels. In this case, the time constant was measured for exposures between 427°C (800°F) and 38°C (100°F) air between 93°C (200°F) and 38°C (100°F) water.

Fine Gage Thermocouples
OMEGA™ fine wire thermocouples are used whenever fast, accurate temperature measurements are required. The fine wire diameters enable accurate temperature measurements without disturbing the base temperature of the body, in which the installation is made, by keeping heat transfer via the leads to a minimum. Also, the fine junction permits accurate “pin-pointing” of the measured values. They are available in wire sized ranging from 0.001" to 0.032" in diameter. All fine gage thermocouples are made from carefully selected materials. To insure consistent thermoelectric properties, each package contains thermocouples made from matched pairs of wire within the same lot number. When specified, several packages of thermocouples made from the same lot number can be supplied at no extra charge.

Response Time
While thermocouple response is a function of medium of submersion, wire diameter, alloy type and temperature level, it is possible to use Table 2 as a guide for comparing the various wire size thermocouples.


Important Ordering Notes

Base Metal Thermocouples
Prices given for 12 inch lengths (package of 5). Other sizes and lengths are available on special order. A 12 inch length corresponds to a 24 inch loop. To order longer lead lengths for base metal calibrations, add $4 per foot per package.

Platinum/Rhodium Thermocouples
Prices given for 6 inch lengths (sold individually). Other sizes and lengths are availableon special order. A 6 inch length corresponds to a 12 inch loop. To order longer lead lengths for Pt/Rh calibrations, see the table below.


Base Metal Calibrations: 300 mm (12") Length Standard
Calibration Wire Dia.
mm (in)
Model
Number
J
Iron
Constantan
0.050 (0.002)
0.075 (0.003)
0.125 (0.005)
0.25 (0.010)
0.38 (0.015)
0.5 (0.020)
0.81 (0.032)
IRCO-002
IRCO-003
IRCO-005
IRCO-010
IRCO-015
IRCO-020
IRCO-032
T
Copper
Constantan
0.050 (0.002)
0.075 (0.003)
0.125 (0.005)
0.25 (0.010)
0.38 (0.015)
0.5 (0.020)
0.81 (0.032)
COCO-002
COCO-003
COCO-005
COCO-010
COCO-015
COCO-020
COCO-032
N
OMEGA-P™
OMEGA-N™
0.075 (0.003)
0.125 (0.005)
0.25 (0.010)
0.50 (0.020)
0.81 (0.032)
OPON-003
OPON-005
OPON-010
OPON-020
OPON-032
Calibration Wire Dia.
mm (in)
Model
Number
K
CHROMEGA™
ALOMEGA™
0.050 (0.002)
0.075 (0.003)
0.125 (0.005)
0.25 (0.010)
0.38 (0.015)
0.50 (0.020)
0.81 (0.032)
CHAL-002
CHAL-003
CHAL-005
CHAL-010
CHAL-015
CHAL-020
CHAL-032
E
CHROMEGA™
Constantan
0.050 (0.002)
0.075 (0.003)
0.125 (0.005)
0.25 (0.010)
0.38 (0.015)
0.50 (0.020)
0.81 (0.032)
CHCO-002
CHCO-003
CHCO-005
CHCO-010
CHCO-015
CHCO-020
CHCO-032


Pt/Rh Calibrations: 150 mm (6") Length Standard – Sold Individually
Calibration Wire Dia.
mm (in)
Model
Number
R
Pt/13%Rh-
Pt
0.025 (0.001)
0.050 (0.002)
0.075 (0.003)
0.125 (0.005)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.50 (0.020)
0.81 (0.032)
P13R-001
P13R-002
P13R-003
P13R-005
P13R-008
P13R-010
P13R-015
P13R-020
P13R-032
Calibration Wire Dia.
mm (in)
Model
Number
S
Pt/10%Rh-
Pt
0.025 (0.001)
0.050 (0.002)
0.075 (0.003)
0.125 (0.005)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.50 (0.020)
0.81 (0.032)
P10R-001
P10R-002
P10R-003
P10R-005
P10R-008
P10R-010
P10R-015
P10R-020
P10R-032


Pt/Rh Calibrations: 150 mm (6") Length Standard – Sold Individually
Calibration Wire Dia.
mm (in)
Model
Number
B
Pt/30%Rh-
Pt/6%Rh-
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.50 (0.020)
0.81 (0.032)
P30R-008
P30R-010
P30R-015
P30R-020
P30R-032
 


View the Thermocouple Accuracy and Color Code charts
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Rated 5 out of 5 by from Clean functional Type K TC's The type K TC's we received were low cost and high quality.
Date published: 2016-09-01
Rated 5 out of 5 by from Question on CHAL-002 I bought CHAL-002 to 005 to fit my needs. They wirk great. Love them. CHAL-002 seems to fit best for my needs however the wire is so delicate that it kept breaking when I connected to controller. Any suggestions?
Date published: 2017-09-09
Rated 4 out of 5 by from T/C wire in semiconductor Works well for measuring temperature in RTP chamber
Date published: 2024-09-05
Rated 5 out of 5 by from Great product These thermocouples are great for measuring the temperature inside small (<1mm) aluminium packages in vacuum
Date published: 2023-09-05
Rated 5 out of 5 by from A highly anticipated order! I'm not the end user, but the lab was anxious to receive this item.
Date published: 2023-08-17
Rated 5 out of 5 by from Top notch product We can always count of Omega for excellent product quality.
Date published: 2022-03-21
Rated 5 out of 5 by from Thermocouple Battery type k omega fine gage bare wire works excellent transfering heat within a casing and two end caps.
Date published: 2020-04-13
Rated 1 out of 5 by from Unreliable Have been using Omega TCs for 40 years. The last 3 orders of small (0.001 and 0.002 inch) diameter type S thermocouples have been unreliable. Products have arrived with wires crossed and junctions 4 to 6 times the wire diameter with what appears to be black soot on wires and bead. Not all, but a significant fraction of the TCs failed to correctly register temperature. OMEGA customer service dropped the ball on my inquiries.
Date published: 2019-07-17
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loading all QA

What does &quot;bare wire&quot; mean? Are the individual wires completely bare or do they have individual electrical insulation? What I need to know is if I have to keep the pair of wires separated from each other all the way to the connector?

Asked by: JB50
Please disregard AndrewA's answer, as it is incorrect. A thermocouple's measurement depends on a junction between two dissimilar metals and a temperature differential. Those two things create an emf along the entire wire, which is measured by a voltmeter and converted into temperature according to the data tables for whichever type of TC you're using. If the two wires touch to form a *second* junction, you'll create a current loop from junction 1 (where your hot spot of interest is) and the touching point, nullifying that measurement. You'll effectively be measuring at the point closest to your voltmeter. Do NOT allow the bare wires to touch (not dangerous, but will give you erroneous readings).
Answered by: RickP
Date published: 2024-02-27

Can these measure subzero temperatures as well?&nbsp;

Asked by: vahid
Yes they bare wire Thermocouples can be used below 0C.
Answered by: ANB ENG
Date published: 2021-01-13

What is the size of the welded joint in a T Type thermocouple of 36AWG?

Asked by: Scott R
Thank you for your inquiry. The diameter of the bead is approximately 2.5 times the diameter of each wire.
Answered by: NorwalkAE_SP
Date published: 2024-06-19

Excuse me, CHAL-015-120, what does 120 mean?

Asked by: weiiip
Thank you for your inquiry. 120 is the length of the wire in inches.
Answered by: NorwalkAE_SP
Date published: 2024-08-06

I have CHAL-005-BW thermocouples. How do I tell one end from the other?

Asked by: Dan It
Thank you for your inquiry Dan. One end of the thermocouple has the wires joined in the junction while the other side has the wires not join together. The junction side is the one that measures temperature.
Answered by: Application Engineer MC
Date published: 2023-11-21

What is the best way to connect a fine thermocouple (Chal-002) to a data logger? or what is the best option for extending the wire?

Asked by: Ayoub
Thank you for your inquiry Ayoub. We recommend that you use an SMPW male connector to attach the CHAL-002 wire to and then use a female connector to extend the run. The wire is so thin on the CHAL-002, you may need to &quot;fold&quot; it a few times for added support, getting it under the contact washer in the SMPW connector. But you need to realize that even, so, it is a fragile connection and much care needs to be taken not to break the wire. Please do not tighten the screw down too tight onto the wire. This can cause breakage also. Additionally, the type of extension you need depends on the data logger, you may need another male connector at the end of your run if the logger accepts a male connection- or just stripped end wire if it has terminal terminations.
Answered by: Application Engineer MC
Date published: 2023-11-21

How many connection wires do the CHAL-010 Type K have? It is not clear in the product photos. I have previously purchased other &quot;bare wire&quot; Omega thermocouples and they had 3 wires which enabled me to solder/connect to an in-house wireless module.

Asked by: TonyMTL
Thank you for your inquiry. CHAL-010 has only 2 connection wires, Chromel (+) and Alumael (-)
Answered by: Application Engineer JB
Date published: 2023-10-16

I will be purchasing type B thermocouples (P30R-008-18) and would like to know the most appropriate connector to match with them to connect to a meter.

Asked by: Robbb
Please link for connector: https://www.omega.com/en-us/temperature-measurement/temperature-connectors-panels-and-block-assemblies/temperature-connectors/smpw-smp-hmp-hmpw/p/SMPW-U-M
Answered by: Application Engineer MC
Date published: 2024-10-21
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