GT8911 Digital LCD Anemometer Thermal Handheld Wind Speed Volume Meter for Factory Office Item Type: Anemometer Material: ABS Unit Wind Speed Range Resolution The lowest point of the starting value Accuracy M/S 0-30 0.01 0.3 ±(3%±0.1) Ft/Min 0-5904 0.01/0.1/1 60 ±(3%±20) Knots 0-58.3 0.01 0.6 ±(3%±0.2) Km/H 0-108 0.01 1 ±(3%±0.4) Mph 0-67 0.01 0.7 ±(3%±0.2) Wind Volume Range CFM 0-999900ft3/Min CMM 0-999900m3/Min Unit Range Resolution Area CFM (FT3/Min) 0-999900 0.001-100 0.001-9999ft2 CMM (M3/Min) 0-999900 0.001-100 0.001-9999m2 Wind Temperature Conversion Unit Gear Resolution Accuracy ℃ 0-45 0.1 ±1℃ ℉ 32-113 0.18 ±1.8℉ Power Supply Built-in Lithium Battery 3.7V 1000mah Working Environment Operating Temperature 0-50℃ (32-122℉) Working Humidity 40-80%RH Storage Environment Storage Temperature -20-60℃ (-4-140℉) Storage Humidity ≤80%RH Unit Conversion M/S Ft/Min Knots Km/H Mph 1m/S 1 196.87 1.944 3.6 2.24 1ft/Min 0.00508 1 0.00987 0.01829 0.01138 1knots 0.5144 101.27 1 1.8519 1.1523 1Km/H 0.2778 54.69 0.54 1 0.6222 1Mph 0.4464 87.89 0.8679 1.6071 1 How e: 1: Connect the handle probe to the main body 2: Turn on 3: According to the measurement needs, press the appropriate button, UNIT unit switch, AREA/SAMPLE record time interval, VEL/FLOW wind speed and wind volume switch, READ read storage record interface, REC keep one time data, DEL delete data interface, Maximum/Minimum Value, ENTER confirmation key 2/3V Maximum, HOLD data retention