... display. Digital RPM Tacho meter/ Techometer (FA) Usage: Applications with control equipments for frequency / tacho / line-speed / flow measurement,such as pulse ... ,thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay ...