Tachometer DT-838 (Photo Type) is applicable to the product departments of motor, fan, paper-product, plastics, chemical fiber, washing-machine, automobile airplane, steamer etc.

Rotative velocity: 2.5~99,999r/min
Laser tach detecting distance: 50~200mm
Accuracy: +/-(0.05%n+1d)
Resolution:0.1/1
Memory: Max/Min/Last
Power Supply: 4x1.5V AA(UM-3) Battery
Battery indicator: low battery indicator
Dimension: 190x72x36mm (7.5x2.84x1.42 inch)
Weight (not including probe): 159g / 0.35lb