These thermocouple probes provide a quick and convenient
method for measuring temperature in your process. They can
be used as-is, mounted into your process using one of Omega's
line of Compression Fittings, or used in a thermowell by using one of our Spring Loaded Fittings.
The M12 Series 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" and 1/8" diameters with lengths of 6", 9", 12",
18" and 24", and metric sizes in 3mm and 6mm diameters with lengths of 250, 500, 750, 1000 and
1500mm. These thermocouple sensors can also be
requested in other lengths as needed.
The connectors on these sensors are overmolded with the IEC
standard color code on the metric sizes and the ANSI standard
color code on the fractional sizes. The connector pinout is
as shown in the accompanying figure.
To connect this sensor to your measurement or control instrument, we recommend using one of
Omega's M12 Extension Cables (listed in the ordering table below). Besides these extension cables,
Omega offers a selection of specially assembled extension cables in a variety of cable materials with
optional stainless steel braid or hose for improved mechanical protection, and a wide selection of
Type J Thermocouples have a 304 SST sheath with a temperature range of -40 to
600°C, with the connector overmolded in black nylon.
Type K Thermocouples have an Inconel 600 sheath with a temperature range of -40 to
1150°C, with the connector overmolded in yellow nylon for fractional sizes and green nylon for metric sizes.
Note: Molded Connectors have a maximum temperature of 90°C
Thermocouple Output is per IEC 584-2, Class 2.
Fractional sizes are 1/4 and 1/8 inch diameters in lengths of 6, 9, 12, 18 and 24 inches.
Metric sizes are 6mm and 3mm diameters in lengths of 250, 500, 700, 1000 and 1500mm.
Insulation Resistance is 100 megohms minimum at 100 VDC for ungrounded sensors.
Minimum Bend Radius is three times the outer diameter of the sensor.
Connect your M12 thermocouple probe to one of Omega's wide
variety on In-Stock controllers, data loggers, hand held
thermometers, PLCs or other measurement & control products
to complete your measurement or control system.
For shorter lengths replace the length in the model number with the required length in inches or millimeters as appropriate, and use the price of the next longer assembly.
For Dual element probes, add "-DUAL" to the end of the Model Number and multiply the price by 1.75.
For longer length Type J, 304 Stainless Steel sheathed probes, change the length in the model number to the required length and add $0.50 per inch (or 25mm) to the price.
For longer length Type K, Inconel 600 sheathed probes, change the length in the model number to the required length and add $0.65 per inch (or 25mm) to the price.
Ordering Example: (1) M12MJSS-1/4-U-6 Type J Ungrounded Thermocouple with 304 Stainless Steel Sheathed, 1/4, $32.19 plus (1) M12MKIN-M6-U-250 Type K Ungrounded Thermocouple with Inconel 600 Sheathed, 6mm Diameter by 250mm Long Probe with Molded M12 Connector, $37.34, $32.19 + 37.34 = $69.53
Part Number Builder
Build Your Part Number Below
Thermocouple Type select from: JSS for Type J with 304 Stainless Steel Sheath KIN for Type K with Inconel 600 Sheath
Probe Diameter select from: 1/4 for 1/4" Diameter 1/8 for 1/8" Diameter M6 for 6mm Diameter M3 for 3mm Diameter
Junction Style select from: U for Ungrounded Junction (Standard) G for Grounded Junction (Optional)
Probe Length select from: 6 for 6" Long (1/8" and 1/4" Diameter Only) 9 for 9" Long (1/8" and 1/4" Diameter Only) 12 for 12" Long (1/8" and 1/4" Diameter Only) 18 for 18" Long (1/8" and 1/4" Diameter Only) 24 for 24" Long (1/8" and 1/4" Diameter Only) 250 for 250mm Long (3mm and 6mm Diameter Only) 500 for 500mm Long (3mm and 6mm Diameter Only) 750 for 750mm Long (3mm and 6mm Diameter Only) 1000 for 1000mm Long (3mm and 6mm Diameter Only) 1500 for 1500mm Long (3mm and 6mm Diameter Only)
Note: All combinations may not be valid, check spec sheet for valid part numbers.