Motor tachometer

Measuring range: 2.5-99999RPM
Resolution: 0.1RPM, at 2.5~999.9RPM; 1RPM, at 1000~99,999 RPM
Accuracy: ±0.02%+1digtal
Measuring distance: 50~500mm
Response time: 0.5s (above120RPM)
Operating environment temperature: 0 to 50oC (32 to 122oF)
Operating environment humidity: 10 to 90%RH
Storage temperature: -10 to 60oC (14 to 140oF)
Storage humidity: 10 to 75%RH