These are just  a  few of the many variants we  have( which will be too long to add to this discription)
So,please contact our company for more info

    FOTEK SM-20 TACHOMETER & LINE SPEED METER
    HIOKI FT-3405 DIGITAL TACHOMETER
    LUTRON DT-2235B DIGITAL TACHOMETER
OMRON H7CX-R11-N 110V-240V DIGITAL TACHOMETER