Contact Non Contact Tachometer Amprobe Tach-10 Non-contact Tachometer - Aeliya Marine Industrial Motor Tester Widely used to measure rotational speed of motors, conveyer belts and other moving or rotating systems. Amprobe Tach-10 Non-contact Tachometer - Aeliya Marine Features: Measures rotational and surface speed User selectable units for contact measurement: RPM, m/min, ft., /min, yd. Amprobe TACH-10 Tachometer measures measuring the rotation speed of a shaft or disk, as in a motor or other machine. by contact or non contact method Universal, economical tachometer measuring rotational or surface speed either in contact or non-contact way. Electronics – Tata Centre for Technology and Design Non-contact measurement in RPM , Digital display