Oil Pressure & Water Temperature 52MM Gauge The REDARC 52mm single oil pressure & water temperature gauge is ideal for monitoring your engines oil pressure and coolant temperature. The G52-PWT gauge is supplied with one REDARC oil pressure sensor that displays from 0 to 80 PSI and a REDARC 1/8 NPT thread water temperature sensor that displays from 30 to 120 degrees Celsius. Monitoring oil pressure ensures the longevity of your vehicle and allows you to ensure that the correct pressure is maintained so that your car bearings are well lubricated. This is crucial when travelling at continuous high speeds and towing heavy loads. Low oil pressure can be an indicator of a low oil level, diluted or worn out oil, worn engine bearings, high oil temperature or a worn oil pump. Temperature Sensor The G52-PWT gauge also supports one of four optional temperature sensors.