... 4.low voltage display 5.auto power off 1.IntroductionWe are a developing,design,manufacturing and sales ... vibration meter, ultrasonic thickness gauge, film/coating thickness gauge, digital hygrothermograph, high voltage megohmmeter, ground resistance tester, electric leakage ... itemswind speed/ wind temperaturemeasuring rangewind speed0~30m/s, 1.4~90km/h, 0~5860feet/min, 0~55 nautical ...