• Used for ambient temperature, humidity, dew point temperature, wet bulb temperature, wind speed, and air volume.

• Large-screen LCD and back light

• Data Hold

• Auto Power OFF

• USB real time data uploading functions.

Different technologies are used with air velocity flow sensors. A thermal anemometer is a body that is heated up to a fixed temperature and then exposed to the air velocity. By measuring how much more air is required to maintain the original temperature, indication of the air speed is gained. The higher the air speed, the more energy required to keep the temperature at a set level. Differential pressure type sensors have Pitot tubes, averaging tubes and other velocity pressure measurement devices. The velocity pressure is the difference between the total pressure and the static pressure. A Pitot tube has two pressure sampling points, static pressure and back pressure. Used with a differential pressure transmitter, the difference between these pressures is a measure of the velocity. Vane anemometers have a proximity switch that counts the revolutions of the vane and supplies a pulse sequence that is converted by the measuring instrument to a flow rate. This is based on the conversion of rotation into electrical signal and can be either a rotating or swinging vane.