THE DIFFERENCE BETWEEN TYPE K & TYPE J THERMOCOUPLE CHT (CYLINDER HEAD TEMPERATURE) SENDING UNITS?

The primary differences between the two thermocouples are:

Measuring Range...
Type K = -330°F to +2460°F (-200°C to +1250°C)
Type J = -40°F to +1382°F (-40°C to +750°C)

Sensitivity...
Type K = approximately 41 µV/°C
Type J = approximately 55 µV/°C

If you already own a gauge it is important that you use the correct thermocouple sensor type, otherwise the result will be incorrect CHT temperature readings due to mismatched sensitivities.

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