... Range:0.01Hz--100KHz(max 100KHz) Accuracy: 0.01Hz Analog Pulse Meter/Frequency Meter/Hz Meter(FA) Features:1, Input: ... various wave form pulse signal (proximity switch,photoelectrical switch or AC signal, etc), ... Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, Pressure sensor, load cell ...