Nutech Engineers manufactures Rigid Detachable Type Diesel Engine Thermocouples. Nutech Engineers is an ISO 9001:2000 certified company. The Rigid Detachable Type Diesel Engine Thermocouples is of rugged construction to withstand vibration. The element can be easily removed for inspection or replacement as follows: The Cover is removed from the Weatherproof Head and the extension lead wires are disconnected. The terminal block and the insulated element can then be pulled out of the assembly.