LCD Digital Tachometer Laser Photo Non Contact RPM Tach Meter Motor Speed Gauge
0.1 RPM (2.5 ~ 999.9 RPM). 1 RPM (over 1,000 RPM). Digital display gives exact RPM with on guessing or errors. Testing Range: 2.5 ~ 99,999 RPM (rate / min). The RPM of motors and machine parts. Circuit: Exclusive one-chip of microcomputer LSI circuit.