How it works: 1, measuring the wind speed of the basic principles of the instrument is the use of calorimetric principle wind speed. Measuring wind speed sensitive element is a hot ball of about 0.8mm in diameter, it is also known as hot bulb anemometer 2, the basic principle of temperature measurement: The instrument uses precision thermistor as the sensing element for measuring temperature. Use of the thermistor resistance varies with temperature characteristics of measuring temperature 3, measuring the relative humidity of the basic principle: The instrument used by the US company Honeywell as a measurement of relative humidity sensor count anemometer, using its output varies with the relative humidity features to measure relative humidity wind speed measurement units Range Resolution Accuracy m / s 0.1 ~ 25.0 0.01 ± (5% + 1d) reading or ± (1% + 1d) full scale km / h 0.3 ~ 90.0 0.1 ft / min 20 ~ 4925 1 MPH 0.2 ~ 55.8 0.1 knots 0.2 ~ 48.5 0.1 air temperature measurement Measuring range 0 ~ 50 ℃ Resolution 0.1 Accuracy ± 1 ℃ Air Flow Measurement Unit Range Resolution CFM 0-99999ft3 / min 0.001 ~ 100 CMM 0-99999m3 / min 0.001 ~ 100 Specifications Display Dual display with backlight large screen sampling rate of about .0.8 seconds Operating temperature 0 ~ 50 ℃ Operating humidity <80% RH Power Supply 9V battery Dimensions 210 × 75 × 50 mm Weight 280 g intelligent hot bulb anemometer is measuring the wind speed as the basic function, increased air volume calculation, calculation of pressure anemometer factory, measuring a variety of functions, temperature and relative humidity, a combination of a series of instruments. It is a portable, with intelligent, versatile basic meter low wind speed measured in all aspects of heating, ventilation, air conditioning, environmental protection, energy monitoring, meteorology, agriculture, refrigerating, drying, labor health survey, which are wide range of uses. Winds measuring range resolution accuracy of 0.1 ~ 30.0 m / s0.01 m / s ± 3% reading Zhi ± 1% FS0.2 ~ 110 km / hr0.1 km / hr10 ~ 6000 ft / min1 ft / min0.1 ~ 59 knots0.01 knots0.12 ~ 68 MPH0.01 MPH wind 0 ~ 999900 CFM0.001 CFM 0 ~ 999900 CMM0.001 CMM temperature -20 ℃ ~ + 60 ℃ 0.1 ℃, 0.1 ℉ ± 0.5 ℃, ± 0.9 ℉ -4 ℉ ~ + 140 ℉ Humidity 0 ~ 100% RH0.1% RH ± 3% RH Wind anemometer, Jinke instruments (certification), anemometer provided by Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) is in Qingdao, Shandong analysis instruments leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Branch of the Instrument in leadership with the staff warmly welcome all inquiries negotiations to create the Branch of the Instrument better future.