These instrument find suitable aplication on those process parameter measurements where pressure is involved as:flow rate measurement by means of orifice plates,nozzles,venturl tubes; pitot tube velocity measurements; static pressure in pipes,vessels,control rooms,pressurized instruments;level measurement in vented or under pressure vessels;pressure drops through valves,heat exchangers utilizers;filter obstruction indication;static,dynamic and total pressures on fans,pumps;vacuum;stack or combustion chamber pressures.    Therefore they can be used pressure gauges,draft-gauges and differential pressure gauges.   On those applications where direct reading is required in it necessary to connect only one leg of the tube,venting the other.   On those application where differential pressure reading is required both legs shall be connected.   Since these instruments do not have any mechanical part they are practically without error.   Generally,mercury is used on liquid measurement and water on gases.我公司总代理意大利NUOVA FIMA的各式充油防震压力表,压力传感器,液位传感器,防暴防水压力开关,压力继电器,膜片压力表,电接点压力表,温度仪表以及石油化工，海上平台用防腐蚀及防爆型压力开关压力传感器等等.