ONOSOKKINon-contact digital handheld tachometerHT-4200Easy-to-use, high-performance, small, non-contact pocket digital tachometer. Put a reflective film on the shaft as a rotation mark, align the tachometer with the reflective film, press the measurement button, and you can directly read and display the speed of 30 to 50,000r/min with high accuracy. In the internal memory, 10 measurement results can be saved. In addition, if you put several reflective films on the shaft, such as 8 reflective films, you can measure the extremely low speed of 4 r/min. Measuring range Number of reflective sheets (number of input signals) 30 to 50,000 r/min 1 15 to 25,000 r/min 2 10 to 16,667 r/min 3 8 to 12,500 r/min 4 5 to 8,333 r/min 6 4 to 6,250 r/min 8 Measuring unit 1 r/min Sensing distance 20 to 300 mm Display digits 5 digits Display method 7-segment LCD Measurement display time 1 second automatic repeat (however, at 30 to 60 r/min, it is automatically repeated every 2 seconds) Measuring accuracy 30 to 12,499 r/min ± within 1 r/min 12,500 to 24,999 r/min ± within 2 r/min 25,000 to 50,000 r/min ± Memory function 10 data of measurement results within 4r/min can be stored in non-volatile memory (recorded values can be maintained even when the power is turned off) Data hold function The measured value is maintained for 30 seconds after the measurement is completed, and the power is automatically turned off after 30 seconds Pulse number setting function 1, 2, 3, 4, 6, 8 P/R (changeover switch) * The number of reflection marks (the number of input signals) corresponding to the speed range Overflow indication is displayed with the letter "OVER" (displayed when the measured value exceeds the range) BAT LOW indication is displayed with the letter "B" (indicates that the battery is exhausted) Operating temperature range 0 to +40℃ Storage temperature range -10℃ to +55℃ Power supply 7-cell battery (1.5V) × 3 pieces, continuous use time about 20 hours Dimensions 129 (W) × 26.4 (H) × 62 (D) mm Weight about 90g (excluding batteries) Accessories Reflection film 1 sheet (12mm square, 25 pieces in total), 7-cell battery x 3, operating manual x 1 Optional HT-011 reflective film (12mm square, 25 pieces/sheet, 10 sheets per set)