There are many anemometers available in the market. One of them is a hot wire anemometer. This instrument converts the flow velocity signal into an electrical signal. Also, this instrument measures fluid temperature or density. You can search on the Internet to find out the best hot wire anemometer manufacturers in india to get top-quality anemometers.

The working mechanism of this instrument is simple. The length of the hot wire is generally in the range of 0.5 to 2 mm. The diameter of the wire is normally in the range of 1 to 10 microns.

The hot-wire anemometer measures the pulsating velocity of the incoming flow and its spectrum. You need to buy the right type of anemometer.

The ordinary single-wire type anemometer uses one wire. Other than that, there are two-wire or three-wire types also. They use a combination of two-wire or three-wire. They can measure speed components in all directions.

The electrical signal output from the hot wire gets amplified and after that, compensation and digitization take place. This becomes the input into the computer. It improves measurement accuracy. The data post-processing process gets over automatically and the velocity measurement function gets expanded.

It completes the measurement of hourly average value and instantaneous value. It also measures parameters like combined velocity and fractional velocity, turbulence degree, and so on.

Many hot wire anemometer manufacturers in india have the advantage of small probe size. It has low interference with the flow field and fast response. It has the ability to measure non-constant flow velocity and low velocity. The measurement range of the hot wire anemometer is between ~20m/s, 0~30m/s, and 0.1~25m/s.

Working principle of hot wire anemometers

This instrument works by placing an electrically heated thin metal wire in the air stream. This wire is called a hot wire. The heat dissipation of the hot wire in the air stream is related to the flow rate. Due to this heat dissipation, temperature change occurs, and the hot wire causes a resistance change. The flow rate signal gets converted into an electrical signal.

Due to the change in the temperature change, the resistance of the hot wire and the voltage at both ends change. The temperature of the wire can be measured so that the size of the flow rate can be measured. The greater the flow rate, the greater the current required to heat. The constant temperature type anemometer is more widely used than the constant current type anemometer.