TOKY FM series Frequency /tacho /linespeed meter with follow features:

1) Single line 4 digit (FM4) or 5 digit (FM8) LED display;

2) Thumb switch setting alarm value;

3) 4 control mode: U-U, U-d, d-U, d-d;

4) One meter with multi-function, frequency / tacho / line speed selected by software;

5) Input output optical isolation, high anti-interference;

6) With hysteresis setting to improve the stability of meter and system;

7) High accuracy, decimal point float or fixed display to be optional.