Digital Laser Photo Tachometer RPM Meter Non-Contact Motor Speed Gauge SM2234A

PHOTO TACHOMETER (LASER)   MODEL: SM2234A

Display 5digit 18mm LCD
Range: 2.5~99999 RPM
Resolution: 0.1 RPM   From:(2.5~999.9RPM)
1 RPM   From:(above 1000RPM)
Accuracy: ± (0.05%+1digital) of reading
Sampling Time: 0.8second (over 60RPM)
Range Select: Auto-range
Time Base: 6MHz Quartz crystal
Memory: Max. value, Min. value,
Last value. Can store 96s data.
Detecting Distance: 50mm-500mm
Dimension: 155*70*35mm
Power: 3×1.5V AAA battery (Not included)