Sisco hot wire anemometer can measure the speed of a gas, such as air, as it flows past a heated wire. It is commonly used to measure wind speed in meteorology and in engineering applications where the flow of gases needs to be measured. Its speed measuring range is 0.1~30m/s, volume measurement range is 0~999900m3/min. The basic principle of a hot wire anemometer is that the resistance of a wire increases as its temperature increases. When the wire is heated, the resistance of the wire increases. As air flows past the wire, it cools the wire down. The faster the air flow, the more cooling effect it has on the wire, and the lower the resistance of the wire becomes. By measuring the resistance of the wire, the anemometer can determine the speed of the air flow. Sisco thermal anemometers are small portable devices that can be used in a variety of settings, including in the field and in laboratory settings. They are often used in conjunction with other instruments, such as temperature and humidity sensors, to provide a more complete picture of the atmospheric conditions in a given location.