JCB Water Temperature Sensors measure coolant temperature. This could be in the engine, or HVAC system. Insufficient water temperature can lead to unnecessary wear and tear. Overheating. Failure. JCB Water Temperature Sensors alert you if oil pressure is low. Helping you keep your machine running smoothly for longer. JCB Water Temperature Sensors provide the durability, reliability and quality you’d expect from JCB. Precisely dimensioned and manufactured for harsh environments, you can trust them to perform.