... Range:0.01Hz--100KHz(max 100KHz) Accuracy:0.01Hz. Digital 4/5/6 LED Frequency Meter (FA) Features:1, Input ... and output,high anti-interference.4, Output:up to 3 alarm output with various output modes selectable:high value,low value ,intervals,etc;analogue output 4-20mA ... Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE KSC box, Rotary Encoder and computer integrated control system etc ...