What is a pressure switch or pressure switch?

Pressure switches or pressure switches are pressure control switches and are used to adjust the pressure of tanks or prevent pressure increase in pressurized environments in the industry. Pressure switch or pressure controller has an electrical contact and when the pressure reaches the specified value The contact is activated and an electrical signal is sent and the switch is disconnected. The pressure switches may also be designed to disconnect or reconnect the system if the pressure increases or decreases. Pressure switches play an important role in establishing safety and control in pressurized systems, also pressurized switches have different types according to use, working pressure and fluid.

Pressure switches are used in systems that work with pressure and need to turn on and off at a certain pressure range.

Pressure sensor (pressure element) in the pressure switch

Pressure switches use different pressure sensors and according to the sensor used in the pressure switch, the pressure range and accuracy of measuring the pressure switch varies.
Types of pressure switches based on the measurement element

Bradoni Pressure switch
Diaphragm push switch
Piston push switch
Differential pressure switch
Solid state high pressure switch or solid state high pressure switch
Piston switch pressure – diaphragm
Pressed switches
Capsule pressure switch

The measuring element in the pressure switch of the pipe switch is the pipe pipe. The Burdon tube is formed of an elliptical tube that increases in length with increasing pressure and moves forward and decreases along the pressure. As the pressure increases and the length of the pipeline increases, it can increase the pressure of the switch and when it reaches less than the specified value, the pressure switch detaches.
The Bardon tube pressure switch has a low cycle rate of less than 25 cycles per minute. The operating pressure range of the pressure switch is 3.5 to 120 Pascals. The measurement error in the high pressure switch is 0.5%.
Diaphragm push switch

Pressure diaphragm switches are made of metal or plastic and are displaced by increasing or decreasing the diaphragm pressure, and as a result of diaphragm displacement, pressure is applied to the piston and the piston is displaced. Due to the increase of pressure up to the set maximum value, the diaphragm reaches the switch and the contact is connected. The operating pressure of the diaphragm switch is from vacuum pressure up to 11 MPa. The measurement error in the pressure switch is 2%

Piston switch press

 

The piston pressure switch works mechanically like the diaphragm pressure switch. Piston pressure switch consists of two cylinders, one of which is located inside the other. A spring with a fixed resistance is used to return the piston to its original position; This spring also has the ability to tighten or loosen to adjust the pressure to the desired value for high pressure switch operation.
Differential pressure switch

The differential pressure switch has two inputs and a diaphragm or elastomeric sensor. When the pressure between the two inputs is equal, no activity takes place. As soon as the pressure between the two inputs changes, the diaphragm or elastomeric sensor is activated and disconnected or connected. If the pressure in the pressure inlet rises, the diaphragm goes to low pressure and moves the piston towards the switch, and the switch activates the electrical signal and sends it to the desired location.
Solid state high pressure switch or solid state high pressure switch

Pressure solid state switch consists of a strain gauge and a triac and has a screen and its output is analog or digital and has 4 different switch programmable points. Solid state pressure switches are resistant to vibration and shock and have a long service life and are used in a wide range of pressures. The measurement error in the solid state pressure switch is less than 0.25%.
Piston pressure switch - diaphragm

The diaphragm piston switch pressure has an elastometric diaphragm which moves the piston and the piston moves the switch tab. The operating range of the diaphragm piston switch is from vacuum pressure up to 11 MPa and the measurement error in the diaphragm piston switch is 2%.
Types of high-pressure switches based on the type of function
Pneumatic pressure switch
Pressurized hydraulic switch
Pneumatic push switch
Pneumatic pressure switch is an air pressure switch.
Pressurized air switch

Air pressure switch is the simplest type of pressure switch used in pneumatic systems.
Application of pneumatic pressure switch
Household applications (automatic switching on of the pump)
Disconnect the electric current of the gas compressor
Disconnect the gas compressor
Batteries
Turn the alarm on and off in the cockpit
Traffic count and gas station
Hydraulic pressure switch
Types of hydraulic pressure switches are as follows
Pressurized water switch
Steam pressure switch
Gas pressure switch
Explosion-proof pressure switch

Water pressure switches are used in hydraulic industries such as automobiles to display an alarm when the engine oil pressure is below an acceptable and safe level or to control the automatic transmission torque lock; Pressurized water switches are also widely used in water pumps and water supply lines, etc.

Steam pressure switch

Steam pressure switches operate with steam, and steam pressure switches must be able to withstand high temperatures and humidity. Steam pressure switches are used to cool water, oil, air and hydrogen fluoride.

Steam pressure switches are either NO or NC and the alarm turns on when the pressure reaches the set values.

Gas pressure switch


Gas pressure switches should prevent sparks in the electrical part as much as possible, gas pressure switches are also used for flammable gases.
Explosion-proof pressure switch

Explosion-proof pressure switches are used in cases where there is a risk of fire due to sparks and flammable gas. Explosion-proof high pressure switch housing is resistant to sparks and penetration of ambient gases.
Application of pressure switch
Water pumps
Pressure panel on sliding doors
Switching at high currents, for example in pumps and drives
Activate the alarm in case of pressure drop inside the aircraft
Charge control inside the battery
Electronic gas compressors
How to choose a pressure switch
The pressure switch is connected to the fluid and is affected by the fluid pressure, so the pressure switch must be proportional to the desired pressure and compatible with the pressure detection unit. It is essential to have a thorough understanding of the application system, performance, and working fluid.
Among the most important things to consider when choosing a pressure switch are the following:
Maximum tolerable pressure
Suffering and setting point
How to connect and connect