тахометр, счётчик числа оборотов
- centrifugal tachometer
- clock-type tachometer
- digital tachometer
- distance-type tachometer
- drag-type tachometer
- eddy current tachometer
- electric tachometer
- electronic tachometer
- hand tachometer
- optical tachometer
- pulse tachometer
- recording tachometer
- remote-reading tachometer
- resonant tachometer
- spindle tachometer
- stroboscopic tachometer
- washdown tachometer