PUMA Digital RPM Meter NPN (96*48) Tachometer
Product: digital RPM (Revolution Per Minute) meter
Input signal: NPN
Display measure: 2~99999
Power supply: 110v AC/220v AC
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It measure the rotation speed of a shaft or disk, as in a motor or other machine.
The device usually displays the revolutions per minute (RPM) in LED digital form.