Plastic Melt Bolt Thermocouple (Type 4M)

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These robust thermocouples have been designed to withstand the high pressures found within the nozzles of plastics extruders and injection moulding machines where they are used in order to measure the temperature of the molten medium. Available as standard in either 3" or 6" bolt lengths with either a 0.2" long or flush sensing tip length. Available in thermocouple types K, T, J, N and they have an insulated junction and are terminated in a standard round pin thermocouple plug. Suitable for use up to 1100°F (at tip) with a bolt thread size of 1/2 inch UNF20, 316 stainless steel.

See detailed information on how a thermocouple works