Oil pressure annuniciators can be used to edtermine the pressure from the lubrcating systems of auto engines.When the pressure becomes lower than the setting figure,it begins to give an alarm, and thus prevents the engines from being damaged.

Sensor is a exact and sensitive element which output the resistance with the change of temperature,it can be used to measure the enter air's temperature、coolant'temperature、inside and outside temperature of room and oil's temperature and so on.