Digital Contact Tachometer (DT2235A)

1) 5 digits 18mm (0.6") White backlight LCD 2) Accuracy: ± (0.05%+1 digit) 3) Sampling Time: 0.5sec (over 120RPM) 4) Range Select: Auto-Ranging 5) Memory: Max. Value, Min. Value, Last value 6) Can store 96s data 7) Power Consumption: Approx 45mA 8) Time base: 6MHz Quartz crystal 9) Time base Accuracy: 10x10-6(0~50℃) 10) Measuring Range: CONTACT TACH: 0.5~19, 999RPM 11) SURFACE SPEED: 0.05~1, 999, 9m/min 12) Resolution: CONTACT TACH: 0.1RPM (0.5~999.9RPM) 1RPM (over 1,000RPM) 13) Surface speed: 0.01m/min (0.05~99.99m/min) / 0.1m/min(over 100m/min) 14) Battery: 4 x 1.5V AA batteries (not include) 15) Size: 17.5cm x 7cm x 3.5cm