... /Count Meter Features:1,Optional timing,counting,frequency and tacho measurement.Univeral panel,Small size,with external terminal,easy installation.2,Input: Frequency: 0 ... 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 Relay, Solid State ...