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What are the types of pressure switches?

Views: 1500     Author: Site Editor     Publish Time: 2021-08-22      Origin: Site

What are the types of pressure switches?

The Digital Pressure Switch amplifies the pressure signal through the high-precision instrument amplifier, collects and processes the data through the high-speed MCU, and compensates with the built-in precision sensor. 

It is high-precision equipment to detect the pressure and liquid level signal and realize the pressure and liquid level monitoring and control.

It is widely used in automatic systems for measuring gas and liquid pressure, such as chemical industry, machinery, hydrology, electric power, environmental protection and so on. 

Because the adjustment is convenient and flexible and the installation is simple. 

It can replace most occasions where the liquid level switch is used. Next, the types of digital pressure switches are introduced.


Here is the content list:

l Flameproof type

l Mechanical type

l Digital type

Digital Pressure Switch


Flameproof type

Pressure switches can be divided into explosion-proof and flameproof, imported flameproof pressure switches need to pass UL, CSA, CE and other international certifications. It can be used in explosion areas and strong corrosion atmosphere. 

Flameproof pressure switches can provide different pressure, differential pressure, vacuum and temperature range and other products. 

Common uses include electric power, petroleum, chemical industry, metallurgy, boiler, food machinery, environmental protection equipment and other industries.


Mechanical type

Mechanical pressure switch, for pure mechanical deformation leads to fretting switch action. When the pressure increases, different sensing pressure components (diaphragm, bellows, pistons) will be deformed and will move upward through mechanical structures such as railing springs, and finally start the fretting switch at the top to output the electrical signal. According to the function principle, the setting mode of UE pressure switch can be divided into continuous displacement type and force balance type.


Digital type

The other is that the Digital Pressure Switch is more popular in the market in recent years, which is used to replace the electric contact pressure gauge and used in the industrial control system with high requirements. 

The digital pressure switch has built-in precision pressure sensor, amplifies the pressure signal through high-precision instrument amplifier, collects and processes data through high-speed MCU, generally uses 4-bit LED to display pressure in real time, relay signal output, upper and lower limit control points can be freely set, small hysteresis, anti-vibration, fast response, stable and reliable, high precision (accuracy is generally ±0.5% F.S, high Zeda ±0.2% F.S). 

The use of backlash setting can effectively protect the repeated actions caused by pressure fluctuations and protect the control equipment, which is  high-precision equipment for detecting pressure and liquid level signals and realizing pressure and liquid level monitoring and control. The features of the digital pressure switch are: the electronic display screen is intuitive, high precision, long service life, convenient to set control points through the display screen, but the relative price is high and needs a power supply.


Digital pressure switch is a new generation of pressure switch developed on the basis of the early traditional analog pointer barometer and high-precision digital sensing technology. It is used for the detection and control of air pressure in the field of pneumatic control. Guangdong NNT Pneumatic Technology Co., Ltd. also has these products, welcome to buy them. Company website: https://www.zhnnt.com/

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