... 01Hz--100KHz(max 100KHz) Accuracy: 0.01Hz Analog Pulse Meter/Frequency Meter/Hz Meter(FA) Features:1, Input: various wave ... switched automatically; Opical isolation for input and output,high anti-interference.4, Output: up to 3 ... (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, ...