... DC power supply 2011---FM series Digital Panel Frequency/Tacho/Count Meter Features:1,Optional timing,counting,frequency and tacho measurement ... , Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter, Timer, Timer Relay, Solid State Relay, Proximity Sensor, Pressure sensor ,load cell ... into international market. 2011---FM series Digital Panel Frequency/Tacho/Count Meter