Measuring devices

reliable, digital non-contact tachometer, for measuring rotation speed of motors and other machines, display results in RPM or revolution count, safely measure rotational objects through a non-intrusive method, sensor type: photodiode and laser tube. revolving speed ranges: 10.0-9999.9rpm, 10000-99999rpm (acc. ±0.04%+2), count range: 0～99999 (±1), auto range, MAX/MIN, data hold, target distance 50-200mm, measuring angle ±30° from perpendicular, auto power off, laser on indication, low battery indication, max count 99999, 184x56x34mm, 85g (w/o batteries), batteries: 3 x AAA (R03)