Photo Tachometer DT6234B is applicable to the product departments of motor, fan, paper-product, plastics, chemical fiber, washing-machine, automobile airplane, steamer etc.

5 digits 18mm (0.6 inch) White backlight LCD
Accuracy: +/-(0.05%+1 digit)
Sampling Time: 0.5sec(over 120RPM)
Range Select: Auto-Ranging
Memory: Max. value, Min. value, Last value
Can store 96s data
Time Base: 6MHz Quartz crystal
Detecting Distance: 50~500mm
Power Consumption: Approx 55mA
Measuring Range: 2.5~99,999RPM
Resolution: 0.1RPM(2.5~999.9RPM)
1RPM(over 1,000RPM)
Total Test Range: 1~99,999
Frequency Range: 1~1,666.6Hz
Resolution: 0.01Hz
Battery: 4x1.5V AA Size Battery or to external
DC 6V Regulated power supply