konstantströmanemometer

A constant current anemometer is a type of thermal anemometer used to measure the speed of air or other gases. It operates on the principle that the heat transfer from a heated element is dependent on the flow rate of the surrounding fluid. In a constant current anemometer, an electric current is passed through a thin wire, which heats up. This heated wire is exposed to the gas flow. As the gas flows past the wire, it carries away heat, causing the wire's temperature to drop. To maintain a constant temperature of the wire, the current supplied to it must be adjusted. The amount of current required to keep the wire at a constant temperature is directly related to the speed of the gas flow. A higher gas flow will require more current to compensate for the increased heat loss, and conversely, a lower gas flow will require less current. Therefore, by measuring the current supplied to the heated wire, the velocity of the gas can be determined. This method offers a relatively simple and sensitive way to measure low to moderate air velocities. It is important to note that the calibration of a constant current anemometer is crucial for accurate measurements and can be affected by changes in gas temperature and pressure.