Feature:1. [Wide Application] It can measure air velocity and air volume, which can be used in wind energy, meteorology, industry, agriculture, hydrology and water conservancy, environmental conservation, highways, airports, etc.2. [Various Units of Measure] Press the UNIT button to select unit(m/s, km/h, mil/h, ft/m, ft/s, knots) when measuring air velocity; and select unit(CMS, CMM, CFM) when measuring airflow.3. [Accurate Measurement] Measuring range from 0.40m/s to 30.00m/s; supports beaufort scale from wind force 0 to 12.4. [Practical Function] Press the Data Hold button to freeze the displayed reading; auto power off in 10 minutes if without any operation; maximum/minimum/average value mode is enabled.5. [User Friendly] Measures 7.75*2.67*1.1in and weighs only 4.79oz, featuring compact and lightweight; and LCD backlight ensures clear visibility even in low-light area.Specification:A professional digital anemometer with stable performance, safety and reliability.Features:[Wide Application]It can measure air velocity and air volume, which can be used in wind energy, meteorology, industry, agriculture, hydrology and water conservancy, environmental conservation, highways, airports, etc.[Various Units of Measure]Press the UNIT button to select unit(m/s, km/h, mil/h, ft/m, ft/s, knots) when measuring air velocity; and select unit(CMS, CMM, CFM) when measuring airflow.[Accurate Measurement]Measuring range from 0.40m/s to 30.00m/s; supports beaufort scale from wind force 0 to 12.[Practical Function]Press the Data Hold button to freeze the displayed reading; auto power off in 10 minutes without any operation; maximum/minimum/average value mode is enabled.[User Friendly]Measures 7.75*2.67*1.1in and weighs only 4.79oz, featuring compact and lightweight; and LCD backlight ensures clear visibility even in low-light area.Note:*Batteries are not included.*Do not touch the fan blade with force.*Do not store or operate the instrument in area with high temperature or humidity.*In use, do not let the strong light directly shine on the fan, in order to avoid measurement errors.*Avoid violent vibration.*Remove the battery before storing the instrument for a long time.*To measure the airflow, the cross-sectional area of the tested air duct must be determined and input into the anemometer.Parameters:Display: LCDMax. Counts: 9999Air Velocity: 0.40-30.00 m/sSampling Rate: Approx. One reading per secondSensor: Air velocity/flow sensor; angled vane arms with bearingBeaufort Wind Scale: 0-12Max/Min/Avg: Record and view minimum, maximum, averageData Hold: Freeze readingOperating Conditions: 0-40(Temperature), 80%RH(Humidity), 2(altitude)Auto Power Off: 10 minutesPower Supply: 3 * 1.5V AAA(LR03) batteries(not included)Accuracy Specifications:Air Velocity MeasurementsRangeResolutionAccuracym/s (meters per second)0.40-30.000.01(2.0%+ 0.5m/s)km/h (kilometers per hour)1.40-108.00.01-0.1(2.0%+ 1.8km/h)ft/s (feet per second)1.30-98.500.01(2.0%+ 1.6ft/s)ft/m (feet per minute)78.00-59000.01-1(2.0%+ 10ft/m)knots (nautical miles per hour)0.80-58.300.01(2.0%+ 1.0knots)mile/h (miles per hour)0.90-67.100.01(2.0%+ 1.1mile/h)Air Flow MeasurementsRangeResolutionAreaCFM (cubic feet per minute)0-99990.01 to 10-9.999CMM (cubic meter per minute)0-99990.01 to 10-9.999CMS (cubic meters per second)0-99990.01 to 1 0-9.999*The accuracy applies within one year after the calibration.*Reference condition: the environment temperature 18 to 28, the relative humidity is no more than 80.Specifications:Brand: SMART SENSORModel: ST6816Color: RedMaterial: ABSItem Size: 19.7*6.8*2.8cm / 7.75*2.67*1.1inPackage Size: 24.3*9*5cm / 9.56*3.54*1.96inItem Weight: 136g / 4.79ozPackage Weight: 298g / 10.51ozPacking List:1 * Hot Film Anemometer1 * Storage Bag1 * Certificate of Calibration1 * User Manual(English)Package List:1 * Hot Film Anemometer1 * Storage Bag1 * Certificate of Calibration1 * User Manual(English)