HY-441 Digital tachometerDetailed product description：

Product Description:
HY-441 digital tachometer is a non-contact portable speed measuring instrument that can accurately measure the speed of various rotating machinery such as electric motors. It is a commonly used instrument in industrial testing.

Technical indicators:
Measurement range: 50-30000 revolutions per minute
Detection method: Non contact reflective, red LED light source.
Measurement distance: 50-150mm
Power supply: Three 5 # dry batteries