... display. Digital RPM Tacho meter/ Techometer (FA) Usage: Applications with control equipments for frequency / tacho / line-speed / flow measurement,such as pulse ... Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE KSC box ...