Tridon Switches Oil Pressure TPS071 The engine oil pressure sender/sensor is designed to measure the integrity of the engine lubrication system. The sender/sensor responds to changes in engine oil pressure, displayed via operation of the oil pressure light or gauge. The oil pressure sender/sensor must be compatible with the vehicle engine management system; the Tridon oil pressure sender and sensor range has been carefully researched and engineered to operate within original equipment manufacturer's specifications for each specific application.