The M8M series thermocouples, with their small
diameter probes and M8 connectors, can be used
where other sensors can't. Thier smaller size allows for
measurements in tight spaces, or when you need to
have a minimum impact on the thermal environment that
you are measuring.
These thermocouple sensors are available in Type J with 304 stainless steel sheaths,
or in Type K with Inconel 600 sheaths. The 1/8" diameter version is overmolded in the
ANSI color code and is available in 6", 9" and 12" lengths. The 2mm and 3mm diameter versions
are molded in the IEC color code and is available in 150, 200 and 250mm lengths.
The connector pin out is as shown in the accompanying figure. To maintain the proper polarity
and the use of thermocouple materials from the sensor to your measurement or control instrument,
we recommend one of Omega's M8 Thermocouple
Extension Cables (listed in the ordering table below).
Specifications:
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 on the 1/8" diameter version, and green nylon on the 2mm and 3mm
diameter versions.
Note: Molded connectors have a maximum temperature of 90°C.
Thermocouple output is per IEC 584-2, Class 2.
Fractional sizes are available with 1/8" diameter x 6", 9" or 12" long probes.
Metric sizes are available with 2mm or 3mm diameter x 150, 200 or 250mm long probes.
Insulation Resistance is 100 megohms at 100VDC for ungrounded sensors.
Minimum Bend Radius is three times the outer probe diameter.
Connect your M8 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.
† All dollar amounts on this site are shown in US currency.
Note:Options:
For non-standard lengths shorter than 250mm or 12 inches, change the length in the model number to the required length (in millimeters or inches as applicable) and use the price of the next longest standard length.
Ordering Example: (1) M8MJSS-18-U-6 Type J thermocouple with 304 stainless steel sheath, 1/8" diameter by 6" long probe and molded M8 connector, $24.00, plus (1) M8MKIN-M3-U-200 Type K thermocouple with an Inconel 600 sheath, 3mm diameter by 200mm long probe and molded M8 connector, $25.00, $24.00 + 25.00 = $49.00
Part Number Builder
Option Descriptions
(1)
Thermocouple Type
Select JSS for Type J with 304 Stainless Steel Sheath KIN for Type K with Inconel Sheath
(2)
Probe Diameter
Select 18 for 1/8 Inch Diameter M2 for 2mm Diameter M3 for 3mm Diameter
(3)
Junction Type
Select U for Ungrounded Junction (Standard) G for Grounded Junction (Optional)
(4)
Probe Length
Select 6 for 6 Inch Long (1/8 Inch Diameter Only) 9 for 9 Inch Long (1/8 Inch Diameter Only) 12 for 12 Inch Long (1/8 Inch Diameter Only) 150 for 150mm Long (2mm and 3mm Diameter Only) 200 for 200mm Long (2mm and 3mm Diameter Only) 250 for 250mm Long (2mm and 3mm Diameter Only)
NOTE: All combinations may not be valid, check spec sheet for valid part numbers.
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The connector pin out is as shown in the accompanying figure. To maintain the proper 
