Thermocouple Probes with Lead Wire & Molded Mini Transition
Transition Junction Style Thermocouple Probes (0.010" to 0.125" Diameter) with High Temp Molded Construction
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- 6" and 12" Lengths in Stock
- 40" PFA Coated Lead Wires Standard
- Sheath Diameters from 0.010" to 0.125"
- 304SS or 321SS Sheath
- Grounded, Ungrounded or Exposed Junction
- Supplied with stripped lead termination (no connector)
- Liquid Crystal Polymer Molded Transition Junction Rated to 260°C (500°F)
- Also Available in Super OMEGACLAD™ XL for Stable, Long-Term Operation at High Temperatures
KMT316SS-125U-12 Model Options
View all modelsEdit 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 or click the CONFIGURE button to build your own.
Thermocouple Type
Process Temperature Max
Process Temperature Range
Sensor Application
Sheath Material
Junction Type
Probe Diameter
Probe Length
Cable Length
Termination Connection Type
Color Code Standard
Additional Feature
Category
Process Temperature Unit
Process Temperature Min
Cable Insulation
Wire Gauge
- Measurement Units °C
- Measurement Type Air/Gas Temperature

Shown smaller than actual size
Now available in Type N, Inconel N or K High Performance XL material. Click here.
Alloy/ANSI Color Code | Sheath Dia. in. | Model No. 6" Length | Model No. 12" Length |
J Iron- Constantan 304 SS Sheath | 0.010" 0.020" 0.032" 0.040" 0.062" 0.125" | JMTSS-010(*)-6 JMTSS-020(*)-6 JMTSS-032(*)-6 JMTSS-040(*)-6 JMTSS-062(*)-6 JMTSS-125(*)-6 | JMTSS-010(*)-12 JMTSS-020(*)-12 JMTSS-032(*)-12 JMTSS-040(*)-12 JMTSS-062(*)-12 JMTSS-125(*)-12 |
**K CHROMEGA™ ALOMEGA™ 304 SS Sheath | 0.010" 0.020" 0.032" 0.040" 0.062" 0.125" | KMTSS-010(*)-6 KMTSS-020(*)-6 KMTSS-032(*)-6 KMTSS-040(*)-6 KMTSS-062(*)-6 KMTSS-125(*)-6 | KMTSS-010(*)-12 KMTSS-020(*)-12 KMTSS-032(*)-12 KMTSS-040(*)-12 KMTSS-062(*)-12 KMTSS-125(*)-12 |
E CHROMEGA™ Constantan 304 SS Sheath | 0.010" 0.020" 0.032" 0.040" 0.062" 0.125" | EMTSS-010(*)-6 EMTSS-020(*)-6 EMTSS-032(*)-6 EMTSS-040(*)-6 EMTSS-062(*)-6 EMTSS-125(*)-6 | EMTSS-010(*)-12 EMTSS-020(*)-12 EMTSS-032(*)-12 EMTSS-040(*)-12 EMTSS-062(*)-12 EMTSS-125(*)-12 |
T Copper- Constantan 304 SS Sheath | 0.020" 0.032" 0.040" 0.062" 0.125" | TMTSS-020(*)-6 TMTSS-032(*)-6 TMTSS-040(*)-6 TMTSS-062(*)-6 TMTSS-125(*)-6 | TMTSS-020(*)-12 TMTSS-032(*)-12 TMTSS-040(*)-12 TMTSS-062(*)-12 TMTSS-125(*)-12 |
**For Super OMEGACLAD™ XL, change “ SS” to “ XL” and add $3 to price. Note: Super OMEGACLAD XL is available only in Type K and N calibration.
Want to learn more about thermocouples? Click on the link to go to our thermocouple tutorial page!
View the Thermocouple Accuracy and Color Code charts


Rated 4 out of
5
by
Josh from
Just as expected
I bought these thermocouples to replace identical ones that have been damaged over the years. They are just what I needed.
Date published: 2016-04-05

I have a few JMTSS-062G-12 thermocouples that I have to install on the bulkhead of a pressurized tank. We're using screw in bulkhead connectors with thermocouple sized ferule connectors.
Hi Segan,
Thank you for the inquiry. Please email us to review options and limitations of bulkhead and compression fittings for this probe;
TEMP@OMEGA.COM
Best regards
OMEGA
Date published: 2021-07-06
Does this item come with a longer wire than 3'?
Thank you for your inquiry Debbie. The Thermocouple Probes with Lead Wire & Molded Mini Transition come with a standard 40" (3.33') cable length.
Date published: 2021-03-11
I need to use a thermocouple in the ground to measure the soil temperature. Looking for a range of 40 degrees F to 185 degrees F. Need to figure out how to use a data logger with thermocouple also.
Please contact the Temperature Engineering group at temperature@omega.com for guidance on the Probes and and Data Loggers suitable for your application.
Date published: 2021-08-12
Can these be supplied with mini connector installed by factory? What is the suffix to do so?
Hi Greg,
These can be ordered with a mini male connector by adding a -SMPW-M to the part number. However, this will make that series a customized part so to get that connector added you would have to contact Technical Sales via e-mail at temp@omega.com and have them start the process to create the quote to have that part number added to the website. That process takes about a week to complete before a quote can be submitted. If you can live with a metal transition barrel it would be easier to use the TJ36 series of Rugged Heavy Duty thermocouples. With this series the Configure Now button will allow you to build the part with the -SMPW-M connector already attached.
Date published: 2020-02-13