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TEST0405 anemometer

The basic principle of the anemometer is to put a thin metal wire in the fluid, and the current is applied to heat the metal wire to make the temperature higher than the temperature of the fluid. Therefore, the wire anemometer is called the "hot wire". When the fluid flows through the metal wire in the vertical direction, it will take away a part of the heat of the metal wire, so that the temperature of the metal wire will drop.

Description

product description

The basic principle of an anemometer is to put a thin metal wire in a fluid, and apply current to heat the metal wire to make the temperature higher than the temperature of the fluid. Therefore, the wire anemometer is called a "hot wire". When the fluid flows through the metal wire in the vertical direction, it will take away a part of the heat of the metal wire, so that the temperature of the metal wire will drop. According to the theory of forced convection heat exchange, it can be derived that there is a relationship between the heat Q lost by the heating wire and the velocity v of the fluid. The standard hot wire probe consists of a short and thin metal wire tensioned by two brackets. Metal wires are usually made of metals with high melting point and good ductility such as platinum, rhodium and tungsten. The commonly used wire has a diameter of 5 μm and a length of 2 mm; the small probe has a diameter of only 1 μm and a length of 0.2 mm.

 

Features

1. Low power consumption, can be used for a long time after a single change of electricity

2. Sensitivity and accurate measurement

3. Small size, can be carried with you, and can be used anytime, anywhere

 

technical parameter

Probe type: thermal wind speed probe

Range: 0 ~10 m/s (0 ~ +50℃)

Range: 0 ~5 m/s (-20 ~0℃)

Accuracy: ±(0.1 m/s + 5% measurement value) (0 ~ +2 m/s)

Accuracy: ±(0.3 m/s + 5% measurement value) (remaining range)

Resolution: 0.01 m/s

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