Orchid Thai contact tachometer DT2236 introduction:

Display digits: 5 1/2.

Laser detection, contact

Automatic range

Sampling rate: 0.5 seconds/second

Storing data: the minimum, average, and maximum

Measuring range: 2.5~99,999 RPM (r/min)

Accuracy: ± (0.05% + 1)

Resolution: 0.1 RPM (2.5~999.9 RPM)

1 RPM (over 1,000 RPM)

Battery: 1.5V AA X4