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Thermocouple Probes with Mounting Threads and M12 Connectors

Thermocouple Probes With and Without Mounting Threads and M12 Connectors


Item# M12KIN-1/8-U-12-D

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $102.84
10-24 $97.70
25-99 $92.56
100-499 $87.41
500-999 $82.27
1000+ $77.13

In stock

Lead Time (If not in stock): 5 weeks
Thermocouple Probes With and Without Mounting Threads and M12 Connectors M12KIN-1/8-U-12-D M12KIN-1/8-U-12-D
  • Available in Type 'J' with a 304 Stainless Steel Sheath or Type 'K' with an Inconel 600 Sheath
  • Single Element Configuration Standard, Optional Dual Element Styles Available
  • Ungrounded Junction Standard, Grounded Junction Optional
  • Available in 1/8' & 1/4', 3mm and 6mm Diameters in a Variety of Lengths and Mounting Threads

M12KIN-1/8-U-12-D 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.

Thermocouple Type
Process Temperature Max
Process Temperature Range
Process Connection Size
Sheath Material
Junction Type
Probe Diameter
Probe Length
Termination Connection Type
Process Temperature Unit
Process Temperature Min
Sensor Application

  • Measurement Units °C
  • Measurement Type Liquid Measurement
Note: These Sensors Require an M12 Extension Cable to Connect the Sensor to Your Instrumentation. A Partial List of our M12 Extension Cables is Included in the Ordering Table Below.

Omega's M12 Thermocouple probes are a convenient way to measure the temperature in your process. These thermocouple probes are available as Type K thermocouples with Inconel 600 sheaths, or as Type J thermocouples with 304 Stainless Steel Sheaths. Standard probe sizes include 1/4" & 1/8" diameter probes 6, 9, 12, 18 and 24" long, and 3mm & 6mm diameter probes 200, 350 and 500mm long. These thermocouples can also be provided in other lengths.

With a variety of standard mounting threads, these probes can be easily configured to match your specific requirements. Fractionally sized 1/4" and 1/8" diameter probes are available with 1/2"NPT, 3/8"NPT, 1/4"NPT or with no mounting threads. Metric sized 3mm and 6mm diameter probes are available with M8x1, M10x1 or with no mounting threads. The non-threaded versions of the sensor can be used as-is or mounted into your process using one of Omega's line of Compression Fittings.

For use in thermowells, the M12-TC-SL version of this sensor is the preferred solution. The M12-TC-SL design includes a non-threaded M12TC style probe with a self-gripping spring and 1/2NPT threaded fitting to insure that the probe will contact the bottom of the thermowell bore without damaging the sensor. This insures that the sensor length will always be a perfect fit for your thermowell. See the M12-TC-SL page for additional information.

The thermocouple compensated M12 connector offers a quick and reliable method for connecting this sensor to your instrumentation. The M12 connector on these sensors is wired in accordance with the pin out shown in the accompanying figure. This pin out matches the wiring provided on Omega's Molded M12 Thermocouple Extension Cables so that the IEC or ANSI color code is maintained between the sensor and your instrumentation. A selection of Omega's M12 Extension Cables are included in the ordering table below.

  • Type J Thermocouples have a 304 SST sheath with a 316L SST housing with a temperature range of -40 to 600°C at the probe end (see connector temperature range below).
  • Type K Thermocouples have an Inconel 600 sheath with a 316L SST housing with a temperature range of -40 to 1150°C at the probe end (see connector temperature range below).
  • M12 Connector has a temperature range of -50 to 90°C.
  • Thermocouple Output conforms to Special Limits of Error per ANSI/ASTM E230.
  • Fractional sizes are 1/4 and 1/8 inch diameters with standard lengths of 6, 9, 12, 18 and 24 inches.
  • Metric sizes are 6mm and 3mm diameters with standard lengths of 200, 350 and 500mm.
  • Insulation Resistance is 1 gigohm minimum at 100 VDC for ungrounded sensors.

  • Connect your M12 thermocouple probe to one of Omega's wide variety of in-stock controllers, data loggers, hand held thermometers, PLCs or other measurement or process control products to complete your measurement or control system.

    View the Thermocouple Accuracy and Color Code charts
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    What is the time constant for these, J and K?

    Asked by: muchtoohard
    Thank you for the inquiry, Please use following charts for time constant values; Best regards OMEGA
    Answered by: NorwalkAE_RS
    Date published: 2021-03-14

    M12KIN-M3-U-200-E CAD models?

    Asked by: ABRU
    We do not provide with CAD drawings of our products. They are considered proprietary information. Thank you.
    Answered by: Application Engineer
    Date published: 2021-04-01

    What is the pinout for the M12KIN-1/8-U-2-B model and how do the pin outputs read a temperature?

    Asked by: Eleanor
    Hi Eleanor, Thank you for the inquiry. The M12 pins are set up so that pin 3 is (-) and pin 2 is (+). The pins provide connection point for the electrical signal. Following link may help you with detail; Best regards, OMEGA
    Answered by: NorwalkAE_RS
    Date published: 2021-02-24
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