... for measurement of RPM,HZ,line speed,level 4/5/6 digit display. Digital RPM Tacho meter/ Techometer (FA) Usage: Applications with control ... Temperature Controller, Digital Adjustor,thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer ...