Digital RPM Tachometer Work with encoder/switch/other signals for measurement ... speed,level 4/5/6 digit display. Digital RPM Tacho meter/ Techometer (FA) Usage: Applications with control equipments for frequency ... 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, ...