HS2234 Non-contact Laser Tachometer Digital Display Motor Tachometer

1. Display: 5-digit liquid crystal display, reading 99,999 2. Measuring range: 2.5 rpm-99,999 rpm 3. Measurement resolution: -2.5 rpm -999.9 rpm: 0.1 rpm -1000 rpm -99999 rpm: 1 rpm 4. Measurement accuracy: +/-0.05% 5. Effective measuring distance: 50-500mm 6. Sampling rate: 0.5 seconds (above 120 rpm) 7. Time base: Quartz crystal 8. Operating temperature: 0-50 degrees Celsius 9. Storage temperature: -20-70 degrees Celsius 10. Power supply: two AAA (seven) batteries 11. Instrument size: 108(L)X60(W)X32(H)mm 12. Accessories: manual, battery, reflective strips (24cm x 4 strips)