... of Thermocouple head (thermocouple,thermocouple head,industrial thermocouple,surface thermocouple,sensor)(1) Probe entry: M12×1, M16×1, M20×1, M22 ... assemble with various types of thermocouple and resistance bulbs. 3P-B (H=36) can assemble with explosion proof thermocouple and resistance ... and others.Thick wall protective sheaths in stainless steel Thermocouple sensor cap