Sinometer Infrared Photo Tachometer. Simply aim the highly-visible light beam at a reflective mark placed on a rotating device, push the button and the RPM reading is immediately displayed. No contact with the shaft or wheel is necessary.
What's in the Box:
DT6234B, Case, AC adaptor, Reflecting Tape Marks and Operation Manual.
Display 5 digits large LCD 15mm (0.6");
Accuracy: +- (0.05% + 1digits);
Sampling time: 0.5 Seconds(over 120 RPM);
Range Select: Auto ranging 2.5 - 99,999 RPM;
Memory: Max, Value/ Min, Value/ Last;
TOT: Total revolution display;
Distance: 50 - 500 mm (Photo);
Time base: Quartz Crystal;
Power Consumption: Approx. 50mA;
Resolution:0.1 RPM1000 RPM;
Power Consumption:< Approx 50mA;
Power: 4 X AA Battery (Not included).