BT-100 is a portable wind speed gauge that can accurately measure wind speed in 5 units: m/s, km/h, ft/min, knots, mph. Wind Temp in °C/°F (Degree Celsius/Fahrenheit). High Precision Wind Meter. Wind Speed Meter for measuring wind speed range 0.3~30m/s(+/- 5% of readings), Wind temperature range -10°C~45°C(+/- 2°C), Resolution 0.1m/s; 0.2°C. With 2 sensitive sensors and 8-leaves sensitive fan, this BT100 Pro high accuracy Anemometer can help you with HVAC installation, CFM calculation, Duct ventilation. Tripod Hole for Mounting. There’s a metal threaded hole on the bottom of the anemometer, so you can fix it on a tripod for continuous wind measurement to set your hands free when you fly drones, rc planes, wings, helicopters and quads, long distance shooting.