HS2234 Non-contact Laser Tachometer Digital Display Motor Tachometer

1. Display: 5-digit liquid crystal display, reading 99,9992. Measuring range: 2.5 rpm-99,999 rpm3. Measurement resolution:-2.5 rpm -999.9 rpm: 0.1 rpm-1000 rpm -99999 rpm: 1 rpm4. Measurement accuracy: +/-0.05%5. Effective measuring distance: 50-500mm6. Sampling rate: 0.5 seconds (above 120 rpm)7. Time base: Quartz crystal8. Operating temperature: 0-50 degrees Celsius9. Storage temperature: -20-70 degrees Celsius10. Power supply: two AAA (seven) batteries11. Instrument size: 108(L)X60(W)X32(H)mm12. Accessories: manual, battery, reflective strips (24cm x 4 strips)