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Copper Extension Wire, for RTD and Thermistor

RTD and Thermistor Extension Wire


Item# EXTT-3CU-26S-250M

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $936.70
5-9 $889.87
10-24 $843.03
25-49 $796.20
50-99 $749.36
100+ $702.53

In stock

Lead Time (If not in stock): 14 weeks
RTD and Thermistor Extension Wire EXTT-3CU-26S-250M EXTT-3CU-26S-250M
  • RTD wire for Extending RTD and Thermistor Signal Leads
  • High Temperature Glass, PFA and Polyvinyl Wire Insulation
  • Wire Available with 2, 3 and 4 Conductors
  • AWG 20 solid, 24 or 26 stranded

EXTT-3CU-26S-250M 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.

Temperature Max
Temperature Range
Wire Gauge
Conductor Insulation
Conductor type
Overall Insulation
Number of Pairs
Overbraiding Type
Color Code Standard
Temperature Unit
Temperature Min
Additional Feature
Cable Type
Special Limit of error

  • Color Code Standard 2 Cu-Rd/Bk
  • Use With Sensor Type Thermocouple
Insulation Model
Number of
Insulation Max. Temp. Nominal
Size (mm)
Conductor Overall °F °C GlassEXGG-2CU-202SolidGlass BraidGlass Braid9004821.52 x 2.414EXGG-2CU-26S27 x 34Glass BraidGlass Braid9004821.52 x 1.322.2EXGG-3CU-26S37 x 34Glass BraidGlass Braid9004821.52 x 1.633.1EXGG-4CU-26S47 x 34Glass BraidGlass Braid9004821.52 x 1.664.1Neoflon®
PFAEXTT-2CU-26S27 x 34PFAPFA5002601.07 x 1.732.2EXTT-3CU-26S37 x 34PFAPFA5002601.834.1EXTT-4CU-26S47 x 34PFAPFA5002602.084.1PolyvinylEXPP-2CU-24S27 x 32PolyvinylPolyvinyl2211052.08 x 3.404.5EXPP-3CU-24S37 x 32PolyvinylPolyvinyl2211054.226.3
* Weight of spool and wire rounded up to the next highest kg. (does not include packing material).

Learn more about thermocouple wires and cables in this article.
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Rated 5 out of 5 by from Great product Good product - no problems - the length is always right
Date published: 2023-06-12
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How do you strip the white jacket/insulation off of the 4 wire RTD? I have a problem nicking the black and red insulated wires. I also have a major fraying issue with all of the insulation on these.

Asked by: Jess1004
Thank you for connecting with Omega. We have large automated machines that do the wire stripping for our production. Unfortunately we no longer sell the handheld thermal wire strippers. These devices had a unique gage stop that limits how much insulation material to cut.
Answered by: RD Engineer
Date published: 2019-11-16

What is the process(manufacture) standard the RTD extension wire conforms to?

Asked by: Morton
Hi Morton, Thank you for the inquiry. We offer both ANSI and IEC color code for RTD wire. If you have further questions on standards please forward them to TEMP@OMEGA.COM. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2020-08-01

What are the dimensions of the EXPP-4CU-24S?

Asked by: testengineer1
Thank you for your inquiry! Each of the 24-AWG wires has a diameter of 0.0201 inches. When all four wires are pressed together they will form a nominal length and width of .0402 inches.
Answered by: Application Engineer CK
Date published: 2021-05-04
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