Pressure gauge classification - Huaqiang Electronic Network

classification

Pressure gauge according to its measurement accuracy

: Can be divided into precision pressure gauges and general pressure gauges. The precision of the precision pressure gauges is 0.1, 0.16, 0.25, and 0.4, respectively. The accuracy of the general pressure gauges is 1.0, 1.6, 2.5, and 4. 0.

Pressure gauge according to its measurement standard

: the pressure gauge is different according to the benchmark of its indicated pressure.

Divided into general pressure gauge, absolute pressure gauge stainless steel pressure gauge, differential pressure gauge. The general pressure gauge is based on atmospheric pressure; the absolute pressure gauge is based on the absolute pressure zero; the differential pressure gauge measures the difference between the two measured pressures.

Pressure gauge according to its measuring range

: Divided into vacuum gauge, pressure vacuum gauge, micro pressure gauge, low pressure gauge, medium pressure gauge and high pressure gauge. The vacuum gauge is used to measure the pressure value less than atmospheric pressure; the pressure vacuum gauge is used to measure the pressure value less than and greater than the atmospheric pressure; the micro pressure gauge is used to measure the pressure value less than 60000 Pa; the low pressure gauge is used to measure the pressure value of 0-6 MPa Medium pressure gauge is used to measure the pressure value of 10~60MPa;

Pressure gauge according to its display

: Divided into pointer pressure gauges, digital pressure gauges.

Pressure gauge according to its function

: Pressure gauges can be divided into local indicating pressure gauges and charged signal control pressure gauges according to their different functions.

Pressure gauges can be divided into: according to the characteristics of the measured medium:

1. General pressure gauge: The general pressure gauge is used to measure the pressure of liquid, gas or steam which has no corrosive effect on copper and copper alloy without explosion, no crystallization or solidification;

2, corrosion-resistant pressure gauge: corrosion-resistant pressure gauge is used to measure the pressure of corrosive medium, commonly used stainless steel pressure gauge, diaphragm pressure gauge, etc.;

3, explosion-proof pressure gauge: Explosion-proof pressure gauges are used in hazardous areas with explosive mixtures in the environment, such as explosion-proof electrical contact pressure gauges, explosion-proof transmitters, etc.

4. Special pressure gauges.

According to the use of the pressure gauge

: can be divided into ordinary pressure gauge, ammonia pressure gauge, oxygen pressure gauge, electric contact pressure gauge, remote pressure gauge, vibration pressure gauge, pressure gauge with inspection pointer, double needle double or double needle single pressure gauge, digital display Pressure gauges, digital precision pressure gauges, etc.

Third, the working principle

The pressure gauge is deformed by the elastic deformation of the sensitive components (Bourdon tube, bellows, bellows) in the watch, and then the pressure deformation is transmitted to the pointer by the conversion mechanism of the movement inside the watch, causing the pointer to rotate to display the pressure.

Fourth, the industrial commonly used pressure gauge - bellows pressure gauge

Membrane pressure gauges are also known as micro pressure gauges. It is suitable for measuring low micro pressure of liquid, gas or steam without explosion hazard, no crystallization, no solidification, and no corrosive effect on copper and copper alloy. The bellows pressure gauge uses a bellows as a sensitive component for measuring small pressures. It is widely used in boiler ventilation, gas pipelines, combustion devices and other similar equipment to measure the micro-pressure and negative pressure of copper alloys which are not corrosive and non-explosive.

Membrane pressure gauge works:

The pressure of the medium to be measured enters the inner cavity of the bellows from the street, and the free end of the bellows is pressed to generate displacement. The motive core gear is rotated by the link mechanism, and the measured pressure value is indicated by the pointer on the dial.

Membrane pressure gauge use:

Used for small pressure measurements on equipment such as boiler ventilation and gas piping.