Electronic Pressure Switch YX-18

Electronic Pressure Switch YX-18

Electronic Pressure Switches are pressure switches with digital display.

Electronic pressure switches have electronic pressure sensors instead of mechanical pressure sensors. Electronic pressure switch integrates pressure measurement, display, output and control. The non-electricity is directly converted into voltage or current through the pressure sensor. The sensor signal is processed. Finally, it is input to the microcontroller to drive the rear circuit or control the electrical switch. The user can determine the pressure value for the action of the pressure switch.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Features of Electronic Pressure Switch YX-18

  • Multi-channel switch (with load capacity 1.2A), analog signal 4~20mA optional;
  • The pressure control switch point adjustment has no dead zone and can be set arbitrarily within the range;
  • Delay switching output time can be set by yourself;
  • Key-press adjustment and on-site setting of various parameters, easy to operate and more flexible.

Specifications of Electronic Pressure Switch YX-18

Working parameters Model
YX18-X YX18-B YX18-F
Connection method G1/4(Can be customized) M20*1.5(Can be customized) M20*1.5(Can be customized)
Output function Two switches + one analog Two switches + one analog Four switching  + one analog 
voltage External power supply: 24VDC±15% External power supply: 24VDC±15%, ripple ≤±5%; 220VAC±15% (optional)
Contact rating DC 24V—1.2A (resistive) DC 24V—1A (resistive); AC 250V—3A (resistive)
control precision ≤±0.5%FS
Control range -0.1~0~0.003~60MPa
Overload capacity 150%
Switch times 1×107
Protection level IP65
Conditions of Use Medium temperature: -30℃~85℃; Ambient temperature: -20℃~70℃;
Relative humidity: 5~85%; storage temperature: -40℃~85℃

Electronic Pressure Switch Applications

From gas mechanics to hydraulic field, precision control field, pressure automatic control field. Electronic pressure switches can replace most of mechanical pressure switches, liquid level switches, pressure relays, electric contact pressure gauges and are used in some places.

Electronic Pressure Switch for Air Compressor

Pressure switches are often used in paper machines, air compressors or pump sets. In this type of equipment, we rely on pressure switches as safety devices, alarms or control elements in the system.

Take an air compressor (referred to as “air compressor”) as an example:
An ordinary air compressor consists of three main parts: a motor, a V-type air pump and an air storage tank. The air compressor is equipped with a pressure switch, which can adjust the start and stop of the motor. By adjusting the pressure in the oil tank, the air compressor can rest .

The air compressor factory can set a certain start and stop pressure according to the requirements of different customers during the debugging process. For example, when the compressor starts, air is pumped inside.

When the pressure reaches the set value, the pressure switch will contact the contacts to stop the motor. When the pressure is lower than the set value, the air compressor starts again. Keep the pressure in the oil tank within the pressure range.

Advantages of Electronic Pressure Switch

  1. Display accuracy
    Intelligent pressure switch: 0.3%FS, 0.5%FS, 1%FS, 1.5%FS
    Mechanical pressure switch: panel display
  2. Repeatability error
    Intelligent pressure switch: less than or equal to 0.5%FS
    Mechanical pressure switch: less than or equal to 1%FS, less than or equal to 1.5%FS
  3. Shock resistance
    Intelligent pressure switch: good shock resistance
    Mechanical pressure switch: relatively poor shock resistance because it is filled with oil
  4. Setting operation
    Intelligent pressure switch: power on, the zero pressure state can be operated by pressing the button, the setting range is the full range
    Mechanical pressure switch: need to be pressurized to the specified pressure, set with a screwdriver, setting range: 20%-80%FS
  5. Contact type
    Intelligent pressure switch: PNP, NPN/solid state relay; this type of contact will not produce arcing, contact carbon deposits, etc.
    Mechanical pressure switch: micro switch, will oxidize

Extended reading: Miniature Pressure Switch

Disadvantages of Electronic Pressure Switch

The advantages of the intelligent pressure switch are mentioned above, and the disadvantages of the smart pressure switch are mainly complicated in wiring. 4 or more, need power supply to use. There may be interference when encountering strong electricity.

The pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.

Electronic pressure switches provide electronic switch output signals.

Electronic pressure switches mainly use pressure sensors for pressure sampling. The non-electricity is directly converted into voltage or current through the pressure sensor. The sensor signal is processed through the signal conditioning circuit, and finally passed through the comparison circuit. The output level is a certain logic state. This logic The level can be input to the microcontroller. Drive the rear circuit or control the electrical switch. The user can determine the pressure value of the action of the pressure switch by setting the level conversion threshold.

Electronic pressure switches are factory set to the optimum switching point or can be programmed in the field thanks to the integrated display and pushbuttons. Their integrated programmable logic allows switching points and output signals to be tailored to the application.

The numerous programmable functions of modern electronic pressure switches include hysteresis, delay time, normally closed or normally open and window functions. They also provide a constant pressure reading and indicate if the switch output is active.

Pressure switches can be divided into coil spring tube pressure switches, diaphragm pressure switches, bellows pressure switches and bellows pressure switches according to the sensing elements.

Pressure switches can be divided into mechanical and electronic smart pressure switches according to their nature.

According to the setting value, the pressure switch can be divided into: adjustable pressure switch and non-adjustable pressure switch.

Pressure switches can be divided into general pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc. according to applications.

Classification of pressure switches:

There are two types of pressure switches: mechanical and electronic. There are many kinds of mechanical pressure switches, and many kinds of electronic ones. Let’s talk about the difference between mechanical pressure switches and old and new electronic pressure switches.

The working principle of mechanical pressure switch is:

When the measured pressure exceeds the rated value, the free end of the elastic element is displaced, and the switching element is pushed directly or after comparison to change the on-off state of the switching element to achieve the purpose of controlling the measured pressure.

Generally, “electric contact pressure gauge” is used, which is an ordinary tube spring pressure gauge, plus two sets of electric contacts.

It can be connected to the electrical contacts of relatively high and low pressure, thereby controlling the pressure between the upper and lower limits. The capacity of this kind of electric contact is small, so it can only switch the control coil of the contactor, and the control position on the pressure switch can be adjusted.

The characteristics of this mechanical pressure switch are: low price, easy to use, but low accuracy, short service life, troublesome control point setting and inconvenient setting.

The working principle of the electronic pressure switch is:

The pointer pressure sensor is used to measure the pressure of the medium, and then the measured pressure is converted into a digital signal and sent to the programmable logic device PLC to control the upper and lower pressure limits. When the pressure reaches the preset pressure, the output voltage drives the motor or other controllable devices.

This kind of pressure switch has many shortcomings. Due to the use of a pointer pressure sensor, the degree is not high and the observability is poor; the entire pressure switch is expensive and has cumbersome controllability.

The new technology electronic pressure switch is designed and produced using high-precision pressure sensor and temperature compensation technology, combined with micro-processing technology and advanced analog-to-digital converter.

This pressure switch has a built-in precision pressure sensor, amplifies the pressure signal through a high-precision instrument amplifier, and collects and processes data through a high-speed MCU.

It adopts LCD or LED real-time digital display pressure, relay signal output, upper and lower limit control points can be set freely, stable and reliable, and high precision. The disadvantage is that the price is extremely high.

Mechanical pressure switches and electronic pressure switches have their own advantages, and they jointly promote the development of pressure measurement.

Extended Reading: Digital Pressure Sensor-RS485

The output of a pressure switch is a digital on-and-off signal. This signal can only have two states of on and off.

The output of a pressure transmitter, however, is an analog electrical voltage or a current signal representing 0 to 100% of the pressure range sensed by the transducer.

Electronic pressure switches are suitable for applications that require stability, multiple switch points and control flexibility. Such as control and automation equipment. They are ideal for installations that require flexible programming and adjustment, local indication displays and additional analog output signals.

The pressure switch you should use ultimately depends on your application. Electronic switches are typically used in industrial, OEM or process type applications. For high/low alarm, control, pressure monitoring and/or automation. They are also commonly used in conjunction with PLCs and other building control equipment.

Compared to mechanical switches, electronic pressure switches have a longer lifespan. They can withstand more pressure cycles. Because they have fewer moving parts, there is less wear on the diaphragm.

More Featured Pressure Switches

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Sino-Inst offers over 10 Electronic Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Electronic Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Electronic Pressure Switch instrumentation, located in China.

Waterproof Pressure Switch PC-500

Waterproof pressure switch is also called waterproof pressure switch. It can be weatherproof for external use.

Waterproof micro pressure switch can meet the pressure control in harsh environment and the place with limited installation space. It is used for pressure alarm, parking or control system, etc. Stainless steel pressure diaphragm, waterproof and moisture-proof.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Features of Waterproof Pressure Switch PC-500

  • All stainless steel structure, increased pressure range, anti-corrosion and moisture-proof.
  • The working pressure can be manufactured according to user requirements (-14.5~3600PSI).
  • Using laser welding process equipment, superior sealing performance.
  • The contacts are all silver-plated, and the special products are silver contacts (industrial grade). Work is stable and reliable.
  • The electrical contacts of the switch have a long working life (more than 100,000 times) and excellent shock resistance.
  • It is made of internationally advanced stainless steel pressure sensor (stainless steel bellows, stainless steel diaphragm).
  • It has excellent qualities such as small size, convenient installation, accurate pressure control, and stable performance.
  • 316SS shell protection.
  • Factory set or adjustable set point on site.

Specifications of Waterproof Pressure Switch PC-500

Output signal:Switch signal
Working pressure (high position) range:-14.5~3600PSI
Reset pressure (low position) range:-11~3400PSI
Working pressure deviation:± 3~30PSI
Ambient temperature:-40~85℃,
Medium temperature:-40~125℃
Electrical load:220VAC ,56/60Hz,3A
Working life:≥100,000 Cycles

PC500 series waterproof stainless steel pressure switch model list

Model Thread size and length
(mm)
Dimensions
(mm)
Electrical connections Switch Type
Normally closed (A)/normally open B
/C (normally open + normally closed)
Adjustment range
(PSI)
Action pressure
(PSI)
PC 501 M12x1.5/13 Φ26.5×60 Hessman connector Single Pole Single Throw A -3614.5 -11~3400
PC 502 M12x1.5-6g Φ26.5×70 Single Pole Double Throw C -3614.5 -11~3400
PC 503 G1/4 /13 Φ26.5×60 Single pole single throw A/B -3614.5 -11~3400
PC 504 G1/4 /19 Φ26.5×70 Single Pole Double Throw C -3614.5 -11~3400
PC 505 M14x1.5 /11 Φ26.5×58 Single pole single throw A/B -3614.5 -11~3400
PC 506 M14x1.5 /11 Φ26.5×68 Single Pole Double Throw C -3614.5 -11~3400
PC 507 G1/2 /15 Φ26.5×62 Single pole single throw A/B -3614.5 -11~3400
PC 508 G1/2 /15 Φ26.5×72 Single Pole Double Throw C -3614.5 -11~3400

What does a pressure switch do on a water pump?

The pressure switch installed in the inlet pipe is designed to prevent the pump from cavitation and evacuation. When the inlet pressure is lower than the set value, it will give a control signal and automatically take measures or give an alarm.

How to tell if well pump pressure switch is bad?

Check whether the pressure switch has the above functions → the pressure in the water pipe decreases to the set value → the switch turns on the pump; the pressure in the water pipe increases to the set value → the switch disconnects and stops the pump (the water pipe must be equipped with a check valve).

The so-called setting value is the required upper and lower pressure value.

If the switch cannot achieve the above functions, 1. Wiring error; 2. Switch failure.

In the use of pressure switches, differential pressure switches, flow switches or temperature switches, there will be a ‘Deadband’ term.

The so-called Deadband is the difference between the values ​​corresponding to the switch-off and switch-on values.

Taking the pressure switch as an example, the Deadband is 0.1MPa. The switch setting value is 1MPa, and the switch is closed when it rises. When the pressure is 0, the switch is off. When the pressure rises to 1MPa. The switch will close.

After closing, when will the switch open again?

Normally, when the switch is closed, the pressure will decrease. When the pressure drops to 1MPa-switch dead zone=1-0.1MPa=0.9MPa. The switch will open again.

If the switch action point is set at 0.7MPa, it will be 0.6MPa when the switch returns to action.

The so-called fixed Deadband means no matter how much pressure you set the action point of the pressure switch to. The value it returns will be smaller (or higher) than the set pressure value by a dead zone value.

The so-called adjustable Deadband is that you can set the size of the value when the switch returns. For example, the adjustable dead zone is 0.05-0.1MPa, and the set value is 1MPa. Then I can make the switch return to action at any value between 0.9MPa-0.95MPa.

Differential pressure switches are also called differential pressure controllers. It is to use the pressure difference between the two pressure guiding pipes to issue an electrical signal (switch contact signal). When the pressure difference between the two ends of the series pressure guiding liquid pipe increases (or decreases) and exceeds the set value of the differential pressure controller, the micro switch inside the differential pressure switch sends a signal to control the reversing valve reversing or monitor the lubrication system. The valve then opens up (or closes down). Therefore, the pressure difference between the two ends of the system liquid pipe is reduced. achieve the normal operation of the system.

Explosion Proof Pressure Switches are designed for pressure control within harsh applications. The wiring contacts are sealed in a solid space through a solid sealed shell to achieve explosion-proof effect.

The explosion-proof construction provides superior protection, while its compact design allows for easy integration into custom equipment or systems. This model is ideal for pressure alarm, shutdown or control within hazardous areas when limited size and process compatibility are needed.

Encapsulated and sealed fast micro switch, which can be divided into single pole double throw or double pole double throw output. In general dangerous occasions and corrosive environments, it is most practical to choose this series of switches. With an internal scale adjustment mechanism, it is convenient for customers to calibrate the set point on site. It has a compact structure and can be widely used in water supply and sewage treatment, papermaking, food and petrochemical, pharmaceutical and other industries.

Extended reading: Miniature Pressure Switch

More Featured Pressure Switches

Frequently
Asked
Questions

Low-voltage switches are roughly classified into three categories: automotive low-voltage protection switches, pressure-controlled low-voltage switches, and low-voltage switches for power equipment. It is suitable for the automobile industry, water purifier industry, electric power industry and other fields.

In different fields, low-voltage switches have different meanings. Generally, there are low-voltage protection switches for automobiles, low-voltage switches for pressure control, and low-voltage switches for power equipment.

The low-voltage switch refers to when the voltage provided by the car to the on-board power supply is lower than how much the on-board power supply will automatically turn off. It is a commonly used electrical component. This function of the on-board power supply is a protection function, which protects the power supply equipment of the car from damage, and gives priority to ensuring the normal power consumption of the car itself, such as ensuring that the car can be ignited normally.

The pressure control low pressure switch is an electrical component that controls the entire circuit of the system to disconnect when the pressure of the water supply in the entire system is too low or there is no water to protect the service life of the pump and prevent the system pump from idling.

The pressure switch is when the pressure in the system is higher or lower than the rated safety pressure. The disc in the sensor moves instantaneously. Push the switch connector on or off by connecting the guide rod.

When the pressure drops or rises to the rated recovery value, the disc resets instantly and the switch resets automatically. Or simply put, when the measured pressure exceeds the rated value. The free end of the elastic element is displaced. Push the switching element directly or after a comparison. Change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.

The working principle of the water pump pressure controller: the working medium (oil, gas, water) directly acts on the metal diaphragm. The pressure of the working medium is reflected by the deformation of the metal diaphragm, and a detection signal or a control signal is output at the same time.

The water pressure switch is automatically closed when the water pressure is too high or too low, which is the function of the protection device.

Sino-Inst offers over 10 Waterproof Pressure Switches for pressure measurement.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Waterproof Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Pressure Switch instrumentation, located in China.

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Adjustable Pressure Switch PC-400

Adjustable Pressure Switch is a mechanical diaphragm pressure switch. Use stainless steel pressure diaphragm.

Adjustable Pressure Switch is mainly suitable for neutral gases such as air, gas, water vapor and liquid media such as water, refrigerant, oil, etc., and can be used in vacuum. Can be used for air compressors, water pumps, etc.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Specifications of Adjustable Pressure Switch PC-400

Pressure regulation range:-1~145PSI
Action pressure:-0.5~80PSI
Working pressure deviation:± 3~30PSI
Ambient temperature:-40~85℃,
Medium temperature:-40~125℃
Load power supply:220VAC ,56/60Hz,6A
Working life:≥100,000 Cycles

If users have special requirements, they can be customized according to the provided samples, drawings, technical parameters, etc.

PC400 series adjustable stainless steel pressure switch model table

ModelThread size and length
(mm)
Dimensions
(mm)
Electrical connectionsSwitch Type
Normally closed (A)/normally open B
/C (normally open + normally closed)
Adjustment range
(PSI)
Action pressure
(PSI)
PC 401M12 x1.5/10Φ24×46TerminalsSingle pole single throw A/B-1~145-0.5~80
PC 402M12 x1.5/10Φ24×55Direct outSingle pole single throw A/B-1~145-0.5~80
PC 403M12 x1.5/10Φ24×46TerminalsSingle Pole Double Throw C-1~145-0.5~80
PC 404M12 x1.5/10Φ24×55Direct outSingle Pole Double Throw C-1~145-0.5~80
PC 405G1/4-19/13Φ24×49Direct outSingle pole single throw A/B-1~145-0.5~80
PC 406G1/4-19/13Φ24×58Direct outSingle pole single throw A/B-1~30-0.5~15
PC 407G1/4-19/13Φ24×49TerminalsSingle Pole Double Throw C-1~145-0.5~80
PC 408G1/4-19/13Φ24×58Direct outSingle Pole Double Throw C-1~145-0.5~80
PC 4091/4-18NPT/13Φ24×49TerminalsSingle pole single throw A/B-1~145-0.5~80
PC 4101/4-18NPT/13Φ24×58Direct outSingle pole single throw A/B-1~145-0.5~80
PC 4111/4-18NPT/13Φ24×49TerminalsSingle Pole Double Throw C-1~145-0.5~80
PC 4121/4-18NPT/13Φ24×58Direct outSingle Pole Double Throw C-1~145-0.5~80
PC 413G1/2-14/15Φ24×51TerminalsSingle pole single throw A/B-1~145-0.5~80
PC 414G1/2-14/15Φ24×60Direct outSingle pole single throw A/B-1~145-0.5~80
PC 415G1/2-14/15Φ24×51TerminalsSingle Pole Double Throw C-1~145-0.5~80
PC 416G1/2-14/15Φ24×60Direct outSingle Pole Double Throw C-1~145-0.5~80

Adjustable pressure switch for air compressor

The air compressor pressure switch can adjust the start and stop of the air compressor. Through the pressure adjustment in the air tank, let the air compressor rest and maintain it.

When the air compressor factory is debugging, it can be adjusted to a certain pressure according to the needs of different customers, and then set a good difference.

For example, when the compressor starts, pump air into it, and when the pressure reaches 20 kg, the air compressor is unloaded or stopped.

When the pressure is 14 kg, the air compressor starts again, but it will have a pressure difference, so you can let it rest at this time.

Extended reading: Miniature Pressure Switch

How to adjust the air compressor pressure switch?

Pressure level adjustment. Use pressure to adjust the screw clockwise to increase its pressure. On the contrary, the acting pressure is low, indicating that its pressure difference remains unchanged.

Use pressure to adjust the screw in 1 clockwise, so that it will rise under its action. On the contrary, the acting pressure decreases, indicating that its pressure will not change.

When the air compressor is set to pressure or running, it means that the vent valve is saturated, and the valve will discharge the gas in the steel pipe. Of course, this is a normal phenomenon and you don’t need to worry.

When adjusting the pressure, do not exceed the pressure range of the compressor, but proper exhaust is necessary.

Besides pressure sensors, we also supply torque sensors. What Is a Torque Transducer? How to Choose?

Adjustable pressure switch for water pump

The working principle of the water pump pressure controller:
The working medium (oil, gas, and water) directly acts on the metal diaphragm. The deformation of the metal diaphragm reflects the pressure of the working medium. Simultaneously output detection signals or control signals.

Extension of knowledge points:
The water pump pressure controller is generally a metal 316L diaphragm sensor, which can be used for neutral oil, gaseous media and water.
The setting value of the controller is adjustable, and the range of adjustment range -0.1~40MPa is optional.

Adjustment method of water pump pressure controller:

  1. Adjust the pressure limit to 1.5MPa (upper switching value) and send out a contact signal. The operation steps:
    • Open the cover and loosen the locker.  
    • Turn the setting value adjustment screw clockwise to make the setting value change from large to small until the switch contacts switch at 1.5MPa.  
    • Tighten the locker. 
       
  2. Adjust the lower limit of pressure to 0.5MPa (lower switching value) to send out a contact signal, the operation steps:
    • Open the cover and loosen the locker.  
    • Rotate the setting value adjustment screw counterclockwise to make the setting value change from small to large until the switch contacts switch at 0.5MPa.  
    • Tighten the locker.

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Sino-Inst offers over 50 Adjustable Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

A wide variety of Adjustable Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Adjustable Pressure Switch instrumentation, located in China.

Stainless Steel Pressure Switch PC-300

Stainless steel pressure switch stainless steel material, compact structure. Can be widely used in water, oil, gas pressure measurement.

Stainless steel pressure switch uses internationally advanced stainless steel pressure diaphragm. All stainless steel color, compact appearance, easy installation and use, high and low pressure integrated design. It can control the pressure of the high pressure end and low pressure end of the system at the same time. The product is waterproof and moisture-proof.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Specifications of Stainless Steel Pressure Switch

Output signal:Switch signal
Working pressure (high position) range:-14.5~2200PSI
Reset pressure (low position) range:-12~2180PSI
Working pressure deviation:± 3~30PSI
Ambient temperature:-40~85℃
Medium temperature:-40~125℃
Electrical load:220VAC ,56/60Hz,3A
Working life:≥100,000 Cycles

Pressure Switch Types

According to different classification standards, we can classify pressure switches as follows.

  • According to the sensing element can be divided into:
    • Coil spring tube pressure switch, diaphragm pressure switch, bellows pressure switch, bellows pressure switch, etc.
  • According to the nature, it can be divided into:
    • Mechanical and electronic smart pressure switches.
  • According to the set value, it can be divided into:
    • Adjustable pressure switch and non-adjustable pressure switch.
  • According to the application, it can be divided into:
    • General pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc.

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Common types of pressure switches

Miniature Pressure Switch

Miniature pressure switch PC-100 has a long working life (more than 100,000 times) and excellent shock resistance. It can be used to monitor liquid or gas pressure.

Manual Reset Pressure Switch

Manual Reset Pressure Switch uses international advanced stainless steel pressure diaphragm with high accuracy. Small size, easy installation and use, high and low pressure integrated design. It can simultaneously control the pressure of the high pressure end and the low pressure end of the system. Manual reset, suitable for semi-automatic operation occasions.

Stainless steel differential pressure switch

The differential pressure switch is made of stainless steel, which can be dirt-resistant, corrosion-resistant, clean and hygienic.

Differential pressure controller, also called differential pressure switch, differential pressure switch, differential pressure controller. It can also be used for cut-off protection of water pumps and filters. It can also be called: differential pressure type water flow switch, differential pressure type flow switch.

The adjustable differential pressure switch can provide a very wide range of adjustable differential pressure settings. It adopts stable micro switch and sensitive diaphragm to achieve the excellent advantages of high precision and low dead zone.

The adjustable differential pressure switch controller is developed for applications that are used in small quantities and have different requirements for differential pressure. It is usually used in engineering to detect the pressure difference of water filters, pumps, heat exchangers, chillers and coils.

When the water flow (pressure difference) in the system rises or falls to the set value. Output an alarm or cut-off function alarm to provide to the automatic control system. It can also be used to indicate the status of a pump or filter.

The differential pressure switch is composed of two diaphragm cavities. And the two into diaphragm and bellows type, And their performance characteristics are also differentsitive diaphragm. High pressure and low pressure enter the high pressure cavity and low pressure cavity of the differential pressure switch respectively. And the differential pressure felt deforms the pressure sensitive diaphragm. Through mechanical structures such as railing springs. Finally, the uppermost micro switch is activated to output the electrical signal.

Different pressure-sensitive components of differential pressure switches are divided into diaphragm and bellows type. And their performance characteristics are also different.

Differential pressure switches are composed of pressure-sensitive components, have different principles, and have different performances. The diaphragm type can be made into high static pressure and low differential pressure, while the bellows itself has low pressure resistance.

Stainless steel digital pressure switch

Stainless steel digital pressure switch, an economical digital pressure switch integrating pressure measurement, display and control. This series of pressure switches can be set with two normally open and normally closed alarm points, and can also achieve two high and low pressure controls. In addition, it has a key to zero, three display units switching and other functions.

The operation method of this pressure switch is simple and intuitive, just set the action point and hysteresis according to the manual, and the hysteresis of the two sets of relays can be set independently. According to the customer site, only one group of control can be used, or both groups can be used.

Stainless steel digital pressure switch

Stainless steel digital pressure switch, an economical digital pressure switch integrating pressure measurement, display and control. This series of pressure switches can be set with two normally open and normally closed alarm points, and can also achieve two high and low pressure controls. In addition, it has a key to zero, three display units switching and other functions.

The operation method of this pressure switch is simple and intuitive, just set the action point and hysteresis according to the manual, and the hysteresis of the two sets of relays can be set independently. According to the customer site, only one group of control can be used, or both groups can be used.

All products adopt food-grade 304 stainless steel joints and 304 stainless steel housings, providing different installation methods in axial and radial directions.

Weatherproof pressure switch

The degree of protection of the fully welded stainless steel shell is designed to reach IP67

General considerations for IP65 and IP67 protection levels:

In order to clarify the “secrets” of these two types of protection, this article will give a technical description: refer to IEC 60529. The first characteristic number specifies “prevention of solid foreign objects”. The second characteristic number specifies “prevention of water entry”.

Weatherproof pressure switch

The degree of protection of the fully welded stainless steel shell is designed to reach IP67

General considerations for IP65 and IP67 protection levels:

In order to clarify the “secrets” of these two types of protection, this article will give a technical description: refer to IEC 60529. The first characteristic number specifies “prevention of solid foreign objects”. The second characteristic number specifies “prevention of water entry”.

Different protection levels can provide different types of protection:
“Dustproof” equipment (IP6x) to prevent “water jet” (IPx5) and “short immersion” (IPx7).
Not all immersion-proof instruments can withstand water jets, and vice versa, and not every instrument that is water-proof jets can be immersed.
In some applications this is a small but extremely important difference.

Stainless steel well pressure switch

A well water pressure switch helps to control a well pump system which helps provide water to a household or business. The pressure switch has a spring on the inside that’s connected to electrical contacts. As time goes on, the spring becomes weak and the electrical contacts wear out which can make it seem that your pump isn’t working quite right.
It is used with submersible well pumps and jet pumps.

Pressure switch for water

The water pressure switch, as the name implies, uses water pressure to control the switch.

When the water pressure switch is in use, a fixed value is generally set. That is to say, when the actual value is less than this fixed value or greater than this fixed value, it will give an alarm. And it moves to cause it to be connected to another connecting rod to switch Power on or off.

When the water pressure in the system reaches a fixed value, it returns to its original state, which acts as a switch.

Extended reading: Miniature Pressure Switch

Air pressure switch

The air pressure switch can be used to control the positive pressure, negative pressure and differential pressure of air, flue gas and other non-flammable gases. Especially in the case of differential pressure control, a small pressure difference can be monitored to achieve precise differential pressure control.

Air pressure switches mainly include two types of normally closed and normally open. The main feature is the use of inch pipe threaded quick coupling or copper pipe welding type installation structure. The installation procedure is flexible, convenient to use, and no special fixed installation is required.

The main application areas are the high and low pressure protection control of household, commercial and automobile refrigeration systems, steam conditions and power stations and other heavy industry areas.

Read more about: Gas Pressure Transducer-Sensor for Gas Pressure Meaurement

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Sino-Inst offers over 50 Stainless Steel Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

A wide variety of Stainless Steel Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Stainless Steel Pressure Switch instrumentation, located in China.

Manual Reset Pressure Switch PC-200

Manual Reset Pressure Switch is suitable for semi-automatic operation. Control high pressure end and the low pressure end of the system at the same time.

Manual Reset Pressure Switch uses international advanced stainless steel pressure diaphragm with high accuracy. Small size, easy installation and use, high and low pressure integrated design. It can simultaneously control the pressure of the high pressure end and the low pressure end of the system. Manual reset, suitable for semi-automatic operation occasions.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Features of Manual Reset Pressure Switch

  1. Manually push the reset switch to meet special working conditions
  2. Working pressure can be manufactured according to user requirements (30-800PSI)
  3. Using laser welding process equipment, excellent sealing performance
  4. The contacts are all silver-plated, and the special products are silver contacts (industrial grade), which are stable and reliable.
  5. Long working life of switch electrical contacts (more than 100,000 times), excellent shock resistance

Specifications of Manual Reset Pressure Switch

Output signal: switch signal
Working pressure (high position) range: 30~800PSI
Reset pressure (low position) Range: 10~700PSI
Working pressure deviation: ±3~30PSI
Ambient temperature: -40~85℃
Medium temperature: -40~125℃
Electrical load: 220VAC, 56/60Hz, 3A
Working life: ≥100,000 Cycles

PC200 series manual reset pressure switch model list:

ModelThread size/length
(mm)
Dimensions
(mm)
Electrical connectionsSwitch Type
Normally closed (A)/normally open B
/C (normally open + normally closed)
Action pressure
(PSI)
Reset pressure
(PSI)
PC 201Inner 7/16-20UNFΦ23×53Direct outSingle Pole Single Throw A30~80010~700
PC 202Inner 7/16-20UNFΦ23×53Direct outSingle Pole Double Throw C30~80010~700
PC 2031/4NPT /13Φ23×59Direct outSingle Pole Single Throw A30~80010~700
PC 2041/4NPT /13Φ23×59Direct outSingle Pole Double Throw C30~80010~700
PC 205Φ6 trachea/72Φ28×108TerminalSingle Pole Single Throw A30~80010~700
PC 206Φ14 trachea x21Φ23×60Direct outSingle Pole Double Throw C30~80010~700
PC 207Inner 7/16-20UNFΦ24×53Direct outSingle Pole Single Throw A30~80010~700
PC 208Inner 7/16-20UNFΦ24×53Direct outSingle Pole Single Throw A30~80010~700

Manual Reset High Pressure Switch

The controller adopts a piston type sensor, which is divided into three types: with a drain port, a non-leak piston and a combination of a piston type and a diaphragm type.

It can be used for compressed air containing oil mist and other gas containing oil mist that has no corrosive effect on the pressure sensor material, hydraulic oil, water-oil emulsion and neutral liquid medium with good lubricating performance.

The setting value of the controller is adjustable, and its adjustment range is 0.3-40MPa.

Extended reading: Miniature Pressure Switch

How does a pressure switch work?

The force switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.  

The working principle of the pressure switch is: when the measured pressure exceeds the rated value, the free end of the elastic element is displaced, and the switch element is pushed directly or after comparison to change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.  

The elastic elements used in the pressure switch include a single-turn spring tube, diaphragm, bellows and bellows.    

Switching elements include magnetic switches, mercury switches, micro switches, etc.    

There are two types of pressure switches: normally open and normally closed.

Extended Reading: Electronic Pressure Switch for Air Compressor

How do you test a pressure switch?

Calibration method of pressure switch:

  1. Find out the action setting value of the tested instrument according to the specification.
  2. Select an appropriate pressure signal source to pressurize the test meter. A standard pressure gauge with an appropriate range detects the signal pressure. Use a multimeter to measure the on and off states of the contacts.
  3. For the high report switch, slowly increase the pressure from low to high, and observe the multimeter. When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is the high reported value.
    Then slowly lower the pressure. When the multimeter indicates a sudden change again, the evaluation of the standard pressure gauge is the reset value.
  4. For the under-report switch, the test pressure should be increased above the set value first, and then slowly decreased.
    When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is a low value.
    Press again slowly, and when the multimeter indicates a sudden change again, the indication value of the standard pressure gauge is the reset value.

Miniature Pressure Switch PC-100

Miniature pressure switch is also called compact pressure switch, or micro pressure controller. Designed specifically for OEM applications. A variety of threads are available.

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Sino-Inst offers over 50 Manual Reset Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

A wide variety of Manual Reset Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Manual Reset Pressure Switch instrumentation, located in China.

Miniature Pressure Switch PC-100

The miniature pressure switch is also called compact pressure switch, or micro pressure controller. Designed specifically for OEM applications. A variety of threads are available.

Miniature pressure switch PC-100 has a long working life (more than 100,000 times) and excellent shock resistance. It can be used to monitor liquid or gas pressure.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Features of Miniature Pressure Switch PC-100

  • Use internationally advanced stainless steel pressure diaphragm (stainless steel bellows). Laser welding process equipment. Exquisite workmanship and high precision.
  • Small size, easy installation and use, high and low pressure integrated design. It can simultaneously control the pressure of the high pressure end and low pressure end of the system.
  • The electrical contacts of the switch have a long working life (more than 100,000 times). Excellent shock resistance.
  • Small and exquisite appearance, easy to install and use.
  • The working pressure can be manufactured according to user requirements (-14.5-800PSI).
  • Using laser welding process equipment, excellent sealing performance.
  • The contacts are all silver-plated, and the special products are silver contacts (industrial grade), which are stable and reliable.

Specifications of Miniature Pressure Switch

Output signal: switch signal
Working pressure (high position) range: -14.5~800PSI
Reset pressure (low position) range: -12~780PSI
Working pressure deviation: ± 3~30PSI
Ambient temperature: -40~85℃
Medium temperature: -40~125℃
Load power supply: 220VAC, 56/60Hz, 6A
Working life: ≥100,000 Cycles

Read more about: Gas Pressure Transducer-Sensor for Gas Pressure Meaurement

If users have special requirements, they can be customized according to the provided samples, drawings, technical parameters, etc.

PC100 series miniature pressure switch model table according to our company’s respective parameter standards when ordering.

ModelThread size/length
(mm)
Dimensions
(mm)
Electrical connectionsSwitch type
Normally closed (A)/normally open B
/C (normally open + normally closed)
Action pressure
(PSI)
Reset pressure
(PSI)
PC 101Inner 7/16-20UNFΦ22×39TerminalSingle pole single throw A/B-14.5~800-12~780
PC 102Inner 7/16-20UNFΦ22×45Direct outSingle pole single throw A/B-14.5~800-12~780
PC 103Φ6 trachea/72Φ22×94TerminalSingle pole single throw A/B-14.5~800-12~780
PC 104Φ6 trachea/72Φ22×100Direct outSingle pole single throw A/B-14.5~800-12~780
PC 105Φ6 trachea/72Φ22×94TerminalSingle pole single throw A/B-14.5~800-12~780
PC 106Φ12 trachea/21Φ22×43TerminalSingle pole single throw A/B-14.5~80-12~75
PC 107G1/4-19BSP/13Φ22×45TerminalSingle pole single throw A/B-14.5~800-12~780
PC 108G1/4-19BSP/13Φ22×51Direct outSingle pole single throw A/B-14.5~800-12~780
PC 1091/4-18NPT/13Φ22×45TerminalSingle pole single throw A/B-14.5~800-12~780
PC 1101/4-18NPT/13Φ22×51Direct outSingle pole single throw A/B-14.5~800-12~780
PC 111G1/8-28BSP/10Φ22×51TerminalSingle pole single throw A/B-14.5~800-12~780
PC 112G1/8-28BSP/10Φ22×51Direct outSingle pole single throw A/B-14.5~800-12~780
PC 1131/8-27NPT/10Φ22×45TerminalSingle pole single throw A/B-14.5~800-12~780
PC 1141/8-27NPT/10Φ22×51Direct outSingle pole single throw A/B-14.5~800-12~780
PC 1153/8-24UNF/7Φ22×34TerminalSingle pole single throw A/B-14.5~300-12~180
PC 1163/8-24UNF/7Φ22×48Direct outSingle pole single throw A/B-14.5~300-12~180
PC 117M10x1/11Φ22×46TerminalSingle pole single throw A/B-14.5~300-12~180
PC 118M10x1.5/11Φ22×46TerminalSingle pole single throw A/B-14.5~800-12~780
PC 119M8x1/8Φ22×42TerminalSingle pole single throw A/B-14.5~300-12~180
PC 120G1/4 /13Φ24×46TerminalSingle Pole Double Throw C-14.5~800-12~780
PC 1211/4-18NPT/13Φ22×46TerminalSingle Pole Double Throw C-14.5~800-12~780
PC 122M12x1.25 cone/13Φ22×45TerminalSingle pole single throw A/B-14.5~800-12~780
PC 123G1/4/13Φ24×61Direct outSingle Pole Double Throw C-14.5~800-12~780
PC 124G1/2/14Φ24×55TerminalSingle Pole Double Throw C-14.5~800-12~780
PC 125G1/2/14Φ24×51TerminalSingle Pole Double Throw C-14.5~800-12~780
PC 126Φ8 or Φ6 gas pipe jointΦ24×68TerminalSingle Pole Double Throw C-14.5~80-12~75
PC 127G1/2/12Φ24×55Direct outSingle pole single throw A/B-14.5~800-12~780
PC 1281/8-27NPTΦ23×45TerminalSingle Pole Double Throw C-14.5~800-12~780
PC 129Inner M11x1/6.5Φ24×55Direct outSingle pole single throw A/B-14.5~300-12~180
PC 130G1/8-28/10Φ22.5×51Direct outSingle pole single throw A/B-14.5~800-12~780
PC 1311/8-27NPT/10.5Φ28.5×64ConnectorSingle Pole Double Throw C-14.5~300-12~180
PC 132Inner M14x1/8Φ25×61Direct outSingle Pole Double Throw C-1000~200-500~150
PC 133M12x1.25 cone/13Φ24×51Direct outSingle pole single throw A/B-14.5~800-12~780
PC 134M12x1.25 cone/13Φ24×61Direct outSingle Pole Double Throw C-14.5~800-12~780

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Miniature Pressure Switch Applications

Mainly used for high and low-pressure protection control of the household, commercial, and automobile refrigeration systems. Steam conditions and power stations. Accumulators, receivers, flash tanks, separators, scrubbers, oil refining devices. It is also suitable for high and low-pressure protection control of various equipment and tools.  

The miniature pressure switch is mainly used on the air compressor to adjust the start and stop status of the air compressor. By adjusting the pressure in the air tank, the air compressor can be stopped and rested, which has a maintenance effect on the machine.
When the air compressor is debugged in the factory, adjust to the specified pressure according to the customer’s needs. Then set a pressure difference.

For example, the compressor starts to start and pumps air into the air storage tank. When the pressure reaches 10kg, the air compressor stops or unloads. When the pressure reaches 7kg, the air compressor starts to start again. There is a pressure difference, and this process can make The compressor takes a break. It protects the air compressor. The compressor is directly driven by the electric motor, which causes the crankshaft to rotate, and drives the connecting rod to cause the piston to reciprocate, causing the cylinder volume to change.

Due to the change of the pressure in the cylinder, the air enters the cylinder through the air filter (muffler) through the intake valve. In the compression stroke, due to the reduction of the cylinder volume, the compressed air passes through the exhaust valve. The mass flow meter is exhausted The pipe and the one-way valve (check valve) enter the gas storage tank, and when the exhaust pressure reaches the rated pressure of 0.7MPa, it is controlled by the miniature pressure switch and automatically stops.

When the pressure of the gas storage tank drops to 0.5-0.6 MPa, the pressure switch is automatically connected and activated.

You may like Industrail pressure sensors.

Miniature Adjustable Pressure Switch

PC400 adjustable stainless steel pressure switch.

This series of pressure switches are used to monitor the pressure of automatic control, lifting systems, refrigeration, grease and lubrication devices, and hydraulic, pneumatic, and water circuits.

Its design uses a hexagonal body, nitrile rubber (NBR), oil-resistant diaphragm, and normally open, normally closed and SPDT single pole double throws gold contacts.

When the pressure needs to be adjusted. After removing the protective cap fastening screw. Use a small screwdriver to rotate the V adjustment screw embedded in the color switch cover. The pressure switches operating point can be set to the required value. Be careful not to affect the spring action.

The micro pressure sensor with a nominal size of 3mm in outer diameter is specially designed for the measurement of dynamic pressure distribution in aerodynamic research and test, which requires small installation size, does not disturb the flow field, and has excellent dynamic response.

It is used in the measurement of aerodynamic performance such as engine intake port pressure distortion, surge, etc. The natural frequency of the sensitive element is >200kHz.

The pressure sensitive element of the miniature pressure sensor adopts the most advanced MEMS (Miro Electronic Mechanical Systems) technology to design and manufacture.

The three-dimensional integrated, double-sided processed silicon piezoresistive pressure sensitive element has excellent linearity accuracy, and the high uniformity of the Wheatstone strain bridge fabricated by ion implantation and fine lithography makes it have a small temperature drift. The force-sensitive structure of silicon thin film formed by bulk micromachining and precise anisotropic etching enables it to have high pressure sensitivity and radial dimensions as small as 1.5mm.

The advanced miniaturized pressure-sensitive chip adopts stress-free packaging technology, hermetically packaged in a special micro-mounting base and stainless steel capillary.

The reference pressure chamber of the absolute pressure sensor is a vacuum chamber sealed on the back of the chip. The reference pressure chamber of the gauge pressure sensor is led out from the back through a thinner stainless steel capillary to communicate with the atmosphere. In order to facilitate the user to obtain a stable pressure reference, a thin nylon tube is used to lead it to the air pressure stable place.

Flat pressure sensor may actually refer to a flat diaphragm pressure sensor, or a flat weighing load cell.

Low cost pressure sensor. At present, ceramic pressure sensors are the ones that can effectively reduce the cost of industrial pressure sensors.

Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base.

SI-338 Ceramic pressure sensor uses ceramic or diffused silicon core. All stainless steel package, small and beautiful appearance. Suitable for occasions with limited installation space. Wide range temperature compensation, high accuracy, small size, no adjustment, wide range coverage. Support OEM processing. Ceramic pressure transmitter is used in compressor, air conditioning and other pressure measurement.

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How to adjust the miniature pressure switch?

Adjust the pressure switch adjustment screw clockwise, and then slowly adjust the pressure switch counterclockwise.
The adjustment of the pressure switch is not mysterious. The switch must be positioned in the original position and tighten the positioning screw until the pressure switch contact is released and stops.

Select a pressure switch/ controller with a set value range of 0.1~1.0Mpa

Turn the pressure adjustment screw on the top right side to make the pointer point at 0.8Mpa (8kg or 8bar) on the scale, this value is the upper limit switching value.

Turn the pressure adjustment screw on the left side of the top to make the pointer indicate 0.3Mpa on the scale.
Lower limit switching value = upper limit switching value-switch pressure difference=0.8-0.3=0.5, this value is the lower limit switching value. To

Connect the wiring terminal of the controller to the controlled electrical circuit.
Please note: ①It is public wiring. ③It is normally open terminal output. ⑤It is normally closed output. High voltage protection, please connect ① ⑤, during normal boosting, ①-⑤ connected (①-③ not connected). When the pressure rises to the set upper limit, that is, at 0.8Mpa, ①-⑤ no connection (①-③ connected).
When the pressure drops, ①-③ are connected at this time, and the pressure drops to the lower limit setpoint, which is 0.3Mpa. Then switch to ①-⑤ connected (①-③ not connected). When the pressure stops and the pressure rises, it will automatically cycle.

Turn on the power and let the pressure of the controlled medium (water, gas) rise.
Please pay attention to the adjustment and make the setting value of the pressure switch consistent with the indication of the pressure gauge.
If the pressure rises to the upper limit setting, the switch has not acted yet, that is, turn the pressure adjusting screw to fine-tune to the switching action, and repeat the verification again and perform the lower limit verification, the process is the same as above.
(Verify several times) Fix the pressure adjusting screw and the differential pressure adjusting screw on the top of the iron case of the pressure switch with red paint.

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Sino-Inst offers over 50 Miniature Pressure Switches for pressure measurement. About 50% of these are liquid pressure switches, 40% are gas pressure switches.

A wide variety of Miniature Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Miniature Pressure Switch instrumentation, located in China.

Pressure Switches

What is a Pressure Switch?

The pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.

The pressure switch adopts a high-precision, high-stability pressure sensor, and transmission circuit. Then through the dedicated CPU modular signal processing technology, the detection, display, alarm, and control signal output of the medium pressure signal are realized.

Pressure switches can be widely used to measure and control the gauge pressure and absolute pressure of various gases and liquids in the fields of petroleum, chemical industry, metallurgy, electric power, water supply, and other fields.

Featured Pressure Switches

Pressure switch types

Pressure switches can be divided into coil spring tube pressure switches, diaphragm pressure switches, bellows pressure switches, and bellows pressure switches according to the sensing elements.

Pressure switches can be divided into mechanical and electronic smart pressure switches according to their nature.

According to the setting value, the pressure switch can be divided into an adjustable pressure switch and a non-adjustable pressure switch.

Pressure switches can be divided into general pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc. according to applications.

You can learn more about pressure switches by wikipedia.

How does a pressure switch work?

The working principle of the pressure switch:

When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously. Push the switch connector on or off through the connecting guide rod.

When the pressure drops to or rises to the rated recovery value, the disc is instantly reset and the switch automatically resets. Or simply when the measured pressure exceeds the rated value, the free end of the elastic element is displaced. Push the switch after connecting or comparing Element. Change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.

The elastic elements used in the pressure switch include a single-turn spring tube, diaphragm, bellows and bellows. Switching elements include magnetic switches, mercury switches, micro switches, etc.

What is a pressure switch used for?

Pressure switches used in industrial machinery and systems must be robust, reliable, accurate, and have a long service life.

Pressure switches are usually used in paper machines, air compressors or pump sets.

In this type of equipment, we rely on pressure switches to act as safety devices, alarms, or control elements in the system.

Pressure switch air compressor
An ordinary air compressor consists of three main parts: an electric motor, a V-shaped air pump, and an air storage tank.

There is also a pressure switch in the air compressor, which can adjust the start and stop of the motor. By adjusting the pressure in the oil tank, the air compressor can rest.

The air compressor factory can set a certain starting and stopping pressure according to the requirements of different customers during the commissioning process.

For example, when the compressor starts, the air is pumped into the interior. When the pressure reaches the set value, the pressure switch will contact the contact to stop the motor. When the pressure is lower than the set value, the air compressor will start again to keep the pressure in the oil tank within the pressure range.

How do you test a pressure switch?

The calibration method of pressure switch:

  1. Find out the action setting value of the tested instrument according to the specification.
  2. Select an appropriate pressure signal source to pressurize the test meter. A standard pressure gauge with an appropriate range detects the signal pressure. Use a multimeter to measure the on and off states of the contacts.
  3. For the high report switch, slowly increase the pressure from low to high, and observe the multimeter. When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is the high reported value.
    Then slowly lower the pressure. When the multimeter indicates a sudden change again, the evaluation of the standard pressure gauge is the reset value.
  4. For the under-report switch, the test pressure should be increased above the set value first, and then slowly decreased.
    When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is a low value.
    Press again slowly, and when the multimeter indicates a sudden change again, the indication value of the standard pressure gauge is the reset value.

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Frequently asked questions

Pressure switches can be divided into three types: explosion-proof, mechanical, and electronic.

Extended reading: Pressure indicator transmitters

The pressure switch is a utility switch that actively turns on or off when the set value is reached according to the set pressure.
Pressure switches and pressure relays can only be opened or turned on under your given pressure to develop easy positional tube bundles. They are all on-off outputs.
Pressure relays generally supply more input nodes or node types than pressure switches.
The output of the pressure sensor can be an imitation signal or a digital signal. It is convenient for the subsequent level to deal with. It can also become a standard transmitter signal for short-range transmission.

As for the difference between pressure transmitter and pressure sensor, many people are not clear. I will tell you today:
The pressure sensor is a sensor that converts pressure into electrical signal output. When the output electrical signal is a standard signal (such as 4-20mA, 0-10mA, etc.), we call it a pressure transmitter. This is the difference between a pressure sensor and a pressure transmitter. So in general, the pressure sensor we often say is actually a pressure transmitter.

You’ll find the pressure switch mounted on a 1/4-in. tube near the pressure tank. It’s what senses when water pressure has dropped to the point where the pressure tank requires more water. The switch then powers up the well pump.

The working principle of the pressure switch: When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously, and the switch connector is turned on or off through the connecting guide rod. When the pressure drops or rises At the rated recovery value, the disc is reset instantly and the switch automatically resets.

Of course, different pressure switches have different ways of resetting. If you need to reset a pressure switch, you’d better contact the manufacturer. Perform reset operation instructions.

Still have questions?

If you cannot find an answer to your question in our FAQ, you can always contact us
and we will be with you shortly.

Sino-Inst offers over 50 Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Pressure Switch instrumentation, located in China.

High Frequency Dynamic Pressure Sensor

Dynamic pressure sensor, the transmitter is a high frequency sensor.

The high frequency dynamic pressure sensor adopts silicon stack silicon technology. At the same time, it has high responsiveness. At the same time, it also has high accuracy in low frequency or static data. The high-frequency dynamic pressure sensor has its own hybrid temperature compensation, and the special processing can reach 2000℃ instantaneously. It can provide stable performance in a wide temperature range, with good linearity, high natural frequency, short rise time and wide excellent response frequency band.

Sino-Inst offers a variety of  Dynamic Pressure Sensors for pressure measurement. If you have any questions, please contact our sales engineers.

Features of High Frequency Dynamic Pressure Sensor

  • Wide measuring medium range
  • Wide pressure measurement range
  • High natural frequency up to 2MHz
  • Stable work
  • Strong anti-interference ability
  • Original imported components, reliable performance.
  • Small size, light weight, complete types, high cost performance

Read more about: What is a pressure sensor and how it works? 

Specifications of High Frequency Dynamic Pressure Sensor

Measuring range-100KPa~0~10KPa…200KPa…1MPa…100MPa
Type of pressureGauge pressure, absolute pressure, negative pressure
Long-term stabilityTypical: ±0.1%FS, maximum: ±0.2%FS/year
Comprehensive accuracy≤±0.25%FS, 0.5%FS
(Comprehensive accuracy includes: linearity + repeatability + hysteresis)
Overload pressure2 times full scale pressure
(100MPa product overpressure is 1.1 times full scale pressure)
Ambient temperature-20 … +85℃
Medium temperature-40 … +85℃, special can be -10℃~200℃
Vibration influence≤±0.01%FS (X, Y, Z axis, 200Hz/g)
Load Resistance≤(U-12)/0.02Ω
Natural frequency150KHz~2MHz
Transmitter frequency response0~1KHz~200KHz
Rise Time0~1mS~2μS
Zero temperature driftTypical: ±0.02%FS/℃, maximum: ±0.05%FS/℃
Sensitivity temperature drift±0.02%FS/℃, maximum: ±0.05%FS/℃
ResolutionInfinitely small in theory, usually 1/100000
MediumGas or liquid compatible with 316 stainless steel
Power supplyTransmitter power supply: 12~36VDC (generally 24VDC),
±15VDC switching power supply or linear power supply
Sensor power supply: constant current: 1mA~4mA;
constant voltage: 5VDC~24VDC
Signal outputAnalog: 4~20mA, 1~5 V DC, 0~10VDC, 0~5V DC
Sensor output: 1.5mV~15mV/V
Insulation resistance100MΩ, 500VDC
Electrical protectionReverse polarity protection, anti-electromagnetic interference
Liquid contact material316L stainless steel
shell material304 stainless steel
Process connectionM20*1.5, G1/4, flush film, other threads can be designed according to customer requirements
Electrical connectionThe cable is IP67 and the connector connection is IP65
weight0.25KG

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Applications of High Frequency Dynamic Pressure Sensor

  • Military engineering
  • Chemical explosion test
  • Petroleum prospecting and well testing
  • Fluid mechanics
  • Internal combustion engine system
  • aerodynamics
  • Scientific tests such as hydraulic power machinery test
  • Chemical explosion test

Read more about: What is industrial pressure transmitter?

More Featured Pressure Sensors

SI-303 Low-Pressure Transducer
Low pressure transducers for air and non-corrosive gases low pressure measurement. 0 ~ 2.5kPa to 0 ~ 30kPa measurable.
SI-350 Sanitary Pressure Transmitter
Sanitary Pressure Transmitter, also called tri clamp pressure transmitter,
is the pressure transducer with the flush diaphragm (flat membrane) as the pressure sensor.
SI-300 Pressure Transducer 4-20mA/Voltage
The 4-20mA/ Voltage Pressure Transducer,
also called pressure transmitter 4-20mA,
is a pressure sensor with4-20ma/Voltage output.
SI-390 Industrial Pressure Transmitter
Pressure transmitters for general industrial applicaitons. -0.1kPa ~ 0 ~ 0.01kPa ~ 100MPa ~150MPa. 0.1% FS, 0.25% FS, 0.5% FS. 4-20mA (2-wire system), 0-5 / 1-5 / 0-10V (3-wire system)
SI-512H High Temperature Pressure Sensor
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.

SIJC-1000HSM-Silicon Pressure Sensor
Silicon pressure sensor, also known as Diffused silicon pressure sensor. Silicon pressure sensors are low cost.
SI-706 Combined Pressure and Temperature Sensor-Dual function
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
Thermocouple types: J, K, E type or PT100 platinum resistance. Two outputs do not affect each other. 
SI-338 Ceramic Pressure Sensor
Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base. Cost-effective. Support OEM processing. 0-0.2MPa -…- 40MPa

Extended reading: Static pressure vs dynamic pressure vs total pressure

More Solutions for pressure measurement

Extended Reading: Digital Pressure Sensor-RS485

Sino-Inst offers over 20 Pressure sensors. A wide variety of  Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China.

Sino-Inst  sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.

Wireless Pressure Sensors

Wireless pressure sensors are a game changer for many industries. No longer do you have to worry about wiring costs or maintenance. Our wireless battery powered pressure monitoring system offers long range connectivity via Bluetooth, or GPRS-NB-iot-LORA. It allows you to keep an eye on water pressure and offers differential pressure monitoring. With the help of our wireless pressure sensors, you’ll be able to keep a close eye on your operations without the need for a controller or indicator.

Sino-Inst offers a variety of Wireless Pressure Sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

Featured Wireless Pressure Sensors

Features of Wireless Pressure Sensors

  • Ultra-low power consumption design. 60UA in sleep mode (3.6VDC battery power supply)
  • NB-iot Narrowband Internet of Things. Supporting our company’s Internet of Things cloud acquisition and monitoring platform.
  • Online monitoring. PC and mobile data applications. Real-time/historical/alarm data query.
  • On-site low-power five-digit display header. Continuous display and trigger display can be divided (optional)
  • Remote configuration: Remote configuration of parameters such as acquisition frequency/sending frequency/upper and lower alarm limits.
  • Data communication protocol MODBUS TCP. .
  • Dual power supply. The battery is powered by 3.6VDC/7.2 VDC lithium sub-battery. The battery life depends on the frequency cycle of the collected data. Generally it can be used for about 2-5 years. External power supply 5-30VDC.
  • High-precision 24-bit ADC collects and digitizes sensor signals.
  • Enhanced EMC anti-interference design. It is suitable for various industrial environments with harsh electromagnetic environment.
  • Abnormal alarm: abnormal alarm of overvoltage and undervoltage/low battery in the pipeline network
  • 24hX365 online monitoring. The data server records data for several years.
  • Open cloud platform API interface/MODBUS-TCP interface. Seamlessly connect with user’s industrial configuration system, customized software and special platform.
  • The installation location of NB-iot IoT products must have NB-iot base station signal. Special IoT card. Low cost and low traffic, annual use.

Low power-battery powered

The low-power wireless pressure transmitter adopts advanced micro-power devices and perfect software management technology. Ensure the real-time performance of data monitoring and instrument status. Built-in large-capacity high-performance lithium battery, which can work continuously for 2-5 years.

Realize remote real-time monitoring, wireless transmission, no need for on-site wiring, saving manpower and construction costs.

The instrument is advanced in design, easy to install and use, and is an ideal upgrade product for traditional pressure transmitters.

Application of wireless pressure sensor

Wireless pressure sensors are mainly used in the following four aspects:

  1. In the power industry. Wireless pressure sensors can be used in data transmission fields such as reactive power compensation, power distribution monitoring, meter collection, and street lamp monitoring.
  2. In the water application industry. Water meter collection, remote monitoring of water resources management, wireless communication of waterway network monitoring.
  3. In the field of environmental protection. Online monitoring system of pollution sources such as CEMS, water quality online monitoring, etc.
  4. In the field of equipment maintenance. Such as elevator monitoring, air conditioning monitoring, etc.. Pressure sensors can be quickly embedded in the user’s monitoring instruments to complete the device monitoring GPRS remote transmission application.

Read more about: What is industrial pressure transmitter?

NB-IoT Wireless Pressure Transmitter Networking Solution

Petroleum pipelines have the characteristics of large diameter, high pressure and large transmission volume. In the process of oil and gas transportation, the pressure transmitter is used to effectively monitor the pressure of the oil pipeline. Further prevent the occurrence of oil and gas pipeline leakage accidents and ensure the safe operation of oil and gas pipelines.

Industry pain points:

  1. The energy transmission pipeline covers a wide area, and the pressure monitoring system based on the wired network is costly and difficult to deploy;
  2. The pressure transmitter is often placed under the ground along with the pipeline. Once installed, it is not easy to replace. A low-power wireless networking solution is required to extend battery life.

NB-IoT wireless pressure transmitter integrates pressure detection, data acquisition, NB-IoT wireless communication, battery self-power supply and other functions. Realize high-precision measurement, automatically set the collection frequency and reporting frequency. Use NB-IoT network to upload data.

Background staff can set alert values for pressure data. Once the warning value is reached, measures to automatically close the valve can be taken immediately. Send work orders to maintenance personnel for quick processing.

The NB-IoT network covers a wide range. Under the same frequency band, NB-IoT has a gain of 20dB compared with the existing network, which is equivalent to improving the coverage area by 100 times. At the same time, it meets the coverage depth of the underground pipe network to ensure that there are no blind spots in the network;

NB-IoT can support massive IoT terminal connections. Supports low latency sensitivity and ultra-low device power consumption. Terminal standby time can reach more than 10 years;

The wireless pressure transmitter can collect, display, measure, report and store metering data in real time. Synchronously upload to the management platform. Ensure that the background personnel can monitor the pipeline status in real time.

Wireless Level Sensor – LoRa

The Wireless Level Sensor upgrades the LoRa wireless transmission function based on the Hydrostatic Level transmitter. Measure water or oil level. This product adopts the LORA debugging method, which can greatly increase the communication distance. It can be widely used in the field of short-distance Internet of Things wireless communication in various occasions.

Read More about: Wireless Level Sensor – LoRa

Wireless pressure sensor system

The rapid development of wireless communication technology and computer technology has been applied to sensor technology. It makes wireless data collection of pressure sensors possible. Its unique performance is more advantageous than traditional pressure sensors. It can be used in areas where wiring and power supply are difficult, areas where people cannot reach. Such as high temperature, severe cold, high humidity areas, contaminated areas or areas where the environment is destroyed. And some temporary occasions. Realized the sensing system Remote testing. This is also an inevitable trend of testing in the information age.

System design

The pressure sensor wireless acquisition system designed in this paper is composed of the front-end sensor data acquisition transmitter part and the terminal data receiver part. Figure 1 shows the block diagram of the transmitter part (upper) and the receiver part (lower) of the sensor data collection.

The sensor data acquisition and transmission part is composed of a pressure sensor, a temperature sensor, a signal processing part, a microprocessor (generally a microcontroller) and a wireless transmission circuit.

Pressure and temperature sensors acquire pressure and temperature values ​​of the surrounding environment.

The signal processing part includes the preceding channel, program-controlled amplifier and A/D converter. Its function is to extract and amplify the analog signal of the sensor under program control and perform analog/digital conversion.

The microprocessor is responsible for controlling the work of each part of the system and processing digital signals. The wireless transmission circuit is under the control of the microprocessor. The encoder encodes and processes the collected information data and transmits it with the transmission module.

The data receiving part is composed of wireless receiving circuit, microprocessor and display part.

Receive data from radio under the control of a microprocessor. After receiving a set of format data, the decoder in the receiving circuit decodes the format data. The current pressure information of the environment is obtained. Then the pressure information is displayed on the LED receiving panel.

Extended Reading: How does a MEMS pressure sensor work?

Pressure transducers for sale

Hygienic / Sanitary Pressure Transmitter
Also called Hygienic pressure Transmitters, or tri clamp pressure transmitter. Sanitary pressure Transmitters is used to food &beverage or pharmaceutical application.
High-Temperature Pressure Transmitter
High-temperature pressure transmitters with a 4-20mA output.
which has a temperature capability of over 850 °C and is not pyroelectric.
Absolute Pressure Transmitter
Absolute pressure transmitter with 4-20mA output for measuring pressure with absolute type reference. Absolute pressure (AP) transmitter is a measure of the ideal (complete) vacuum pressure.
Hydrostatic pressure transmitter
Hydrostatic pressure transmitter is used for fluid hydrostatic pressure measurement. With working static pressure up to 32Mpa, for liquid, gas or steam .
SI-520 Digital Pressure Sensor
Digital Pressure Sensor is particularly suitable for use in computer control systems. RS485 half-duplex working mode.
SI-302 OEM pressure sensor
OEM pressure sensors from Chinese manufacturer. Silicone filled. Protected by stainless steel diaphragm. Suitable for a variety of fluid media.
SI-703 Flush diaphragm pressure sensor
Flush membrane / diaphragm structure, anti-blocking design. Pressure measurement of viscous media.
SI-10 Liquid pressure sensor
Liquid pressure sensor is widely used for pressure measurement of various liquids. Like water or oils. IP68 waterproof.
SI-512H High Temperature Pressure Sensor
High Temperature Pressure Sensor for pressure measurement of high temperature gas or liquid. Such as steam pressure. High temperature up to 800 ℃.
SIJC-1000HSM-Silicon Pressure Sensor
Silicon pressure sensor, also known as Diffused silicon pressure sensor. Silicon pressure sensors are low cost.
SI-706 Combined Pressure and Temperature Sensor-Dual function
Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.
Thermocouple types: J, K, E type or PT100 platinum resistance. Two outputs do not affect each other. 
SI-338 Ceramic Pressure Sensor
Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base. Cost-effective. Support OEM processing. 0-0.2MPa -…- 40MPa

More Applications and Markets of Wireless Pressure Sensors

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Water pressure transducers also called a water pressure sensor, are pressure transmitters that can measure water pipe pressure. For the…

Wireless pressure sensor manufacturer

In conclusion, wireless pressure sensors have revolutionized the way industries monitor pressure measurement. The wireless battery powered pressure monitoring system has eliminated wiring costs, improved safety, and reduced maintenance costs.

Our wireless pressure transmitters offer additional features and benefits when compared to traditional pressure transmitters. If you’re interested in learning more about our wireless pressure transmitters, contact us today.

Sino-Inst, as the manufacturer of wireless pressure sensors, offer you with the best price.

Sino-Inst offers 10 wireless pressure sensors products. These are wireless pressure sensors, wireless differential pressure transmitter, and wireless temperature transmitter.

A wide variety of wireless pressure sensors options are available to you, such as free samples, paid samples. Sino-Inst is wireless pressure transmitter manufacturer, located in China.

Wireless pressure sensor products are most popular in North America, Domestic Market, and South America. You can ensure product safety by selecting from certified suppliers, with ISO9001, and ISO14001 certification.

Request a Quote

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Diaphragm Seal Pressure Transmitters

Diaphragm Seal Pressure Transmitters work with Diaphragm Seals for those harsh working conditions. The purpose of the diaphragm seal is to isolate the pressure sensor from the process medium.

The diaphragm seal makes measuring pressure safer and more reliable. It is ideal for protecting pressure process transmitters even under harsh working conditions. The diaphragm seal can isolate the pressure sensor from the process medium. No matter absolute pressure or differential pressure measurement. Mounting with capillary and flange, Diaphragm Seal pressure transmitter can measure pressure, liquid level and flow.When the environment is extremely hot or cold, or when the process connection is difficult to connect to the measuring instrument. When the measured medium is corrosive, sticky, sticky or easily cured. Or when the process is not chemically compatible with the instrument material. It is recommended to use a diaphragm seal.

Sino-Inst offers a variety of Diaphragm Seal Pressure Transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.

Featured Diaphragm Seal Pressure Transmitters

Flush diaphragm pressure sensor
Sanitary Pressure Transmitter
Diaphragm Seal Pressure Transmitter
Remote Diaphragm Seal Pressure Transmitter
Flange Mounted Differential Pressure Transmitter
Extended Diaphragm Seal DP Level Transmitter
Remote Seal Differential Pressure Transmitter
Differential pressure(DP) level transmitter

What is a diaphragm seal?

Diaphragm seals, also known as chemical seals or remote seals, are used for pressure measurements when the process medium should not come into contact with the pressurised parts of the measuring instrument.

A diaphragm seal has two primary tasks:

  1. Separation of the measuring instrument from the process medium
  2. Transfer of the pressure to the measuring instrument

You may like: Diaphragm pressure gauge

Advantages of diaphragm seals

Diaphragm seals offer the advantage that the “contact surface” between pressure medium and diaphragm is relatively large. Thus ensuring accurate pressure measurement, especially for very low pressures (< 600 mbar). Furthermore, they can be easily dismounted, e.g. for cleaning or calibration purposes.

Rosemount 1199

Rosemount 1199 remote transmission diaphragm system provides the world’s most extensive product variety and specifications to meet the requirements of various measurements and applications.

There are the following types of remote transmission differential pressure / level transmitters:
1) PFW flat type remote transmission device
2) RTW thread installation type remote transmission device
3) EFW inserted barrel remote transmission device
4) RFW flange mounted remote transmission device
5) SCW hygienic remote transmission device

The 1199 remote diaphragm can be assembled to Sino-Inst differential, gauge, and absolute pressure transmitters and liquid level transmitters.

We can learn more about Rosemount 1199 remote diaphragm.

How do diaphragm seals work?

Basically, diaphragm seals are used in all pressure measurement processes to avoid direct contact between the measuring instrument and the medium during this process.

In addition, if the measuring point cannot be installed or read because the measuring point is located in a hard-to-reach location, a diaphragm seal can also be used.

In both cases, the applied pressure is transferred to the measuring instrument through the system fill fluid in the diaphragm seal housing.

The diaphragm of the seal can be made of different materials, such as stainless steel, Hastelloy, Monel or tantalum. In addition, coatings with ECTFE, PFA or gold can also be used.

We can provide the best diaphragm seal design, materials, system fill fluid and accessories for each application. The combined configuration of the pressure measuring instrument and the diaphragm seal is mainly determined by the special application conditions of the diaphragm sealing system.

You may like: How does a pressure transmitter work?

Differential Pressure Transmitter Installation Guide

Diaphragm type pressure transmitter working principle

Diaphragm pressure transmitter is an automated instrument that measures fluid pressure in the industrial field.

  • It is mainly composed of pressure measuring probe, capillary tube, filling liquid and pressure transmission head.
  • One end of the pressure measuring probe is provided with an elastic metal diaphragm
  • When the pressure acts directly on the surface of the measuring diaphragm, the diaphragm will have a slight deformation.
  • The high-precision circuit on the measuring diaphragm transforms this tiny deformation into a highly linear voltage signal proportional to the pressure and also proportional to the excitation voltage.
  • Then use a special chip to convert this voltage signal into an industry standard 4-2OmA current signal or 1-5V voltage signal.
  • Because the measuring diaphragm adopts standard integrated circuit, which contains linear and temperature compensation circuits, it can achieve high precision and high stability.
  • The transmission circuit adopts a special two-wire system chip, which can ensure the output of a two-wire 4-20mA current signal, which is convenient for field wiring.

Read more about: What is industrial pressure transmitter?

When to use diaphragm seal ?

The diaphragm seal pressure transmitter is suitable for the following working conditions:

  1. The high temperature medium needs to be isolated from the transmitter.
  2. The measuring medium has a corrosive effect on the sensitive components of the transmitter.
  3. Suspended liquid or high viscosity medium.
  4. The measured medium solidifies or crystallizes due to changes in the environment or process temperature.
  5. Replacing the measured medium requires strict purification of the measuring head.
  6. The measuring head must be kept clean and hygienic.
  7. Liquid level measurement of sealed pressure vessel.

Difference between bourdon tube and diaphragm pressure gauge:

Frequently
Asked
Questions

The remote seal is used to prevent the medium in the pipeline from directly entering the pressure sensor assembly in the pressure transmitter. It is connected to the transmitter by a capillary filled with fluid. As a result, they’re often used in refining, petrochemical, and chemical plants.

Diaphragm pressure gauge consists of a diaphragm isolator and a universal pressure gauge to form a system pressure gauge. The spring tube is evacuated by special equipment. And fill people with irrigation fluid. Seal it with a diaphragm. When the pressure P of the measured medium acts on the diaphragm, it deforms. The working fluid filled in the compression system makes the working fluid form a △ P equivalent to P, with the help of work. The conduction of the liquid causes a corresponding elastic deformation-displacement at the free end of the elastic element (spring tube) in the pressure meter. According to the working principle of the pressure instrument matched with it, the measured pressure value is displayed.

Diaphragm pressure gauges consist of a system of diaphragms and universal pressure gauges. Diaphragm pressure gauges and equipment are mainly connected with threaded connections, flange connections and sanitary clamps. Diaphragm pressure gauges are suitable for measuring the pressure of medium with strong corrosion, high temperature, high viscosity, easy to crystallize, easy to solidify, and solid floats, as well as occasions where the measurement medium must be avoided from entering the general-purpose pressure meter and to prevent the accumulation of sediment and easy to clean.

The characteristics of the filling fluid determine the performance of the sealing system to a large extent, both in response time and temperature to the heat dissipation conditions.
The initial consideration in choosing a sealed diaphragm to fill fluid is the media compatibility of the process.
Glycerin, silicone oil and halogenated carbon are the most commonly used sealed diaphragm filling fluids.
In general there are three ways to fill a diaphragm seal:
1. Filling a diaphragm seal after assembly of the seal to the instrument
2. Filling a diaphragm seal before assembly of the seal to the instrument
3. Filling a diaphragm seal with a capillary between the seal and the instrument

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Sino-Inst is a manufacturer of Diaphragm Seal Pressure Transmitters.

Sino-Inst offers over 20 Diaphragm Seal Pressure Transmitters at best price. About 50% of these are Pressure level Transducer, 40% are Differential Pressure transmitters, and 40% are Diaphragm Seal Pressure transmitters.
A wide variety of Diaphragm Seal Pressure Transmitters options are available to you, such as free samples, paid samples. 

Sino-Inst is a globally recognized supplier and manufacturer of Diaphragm Seal Pressure Transmitters, located in China. Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Diaphragm Seal Pressure Transmitters products are most popular in Domestic Market, Southeast Asia, and Mid East. 

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

Request a Quote

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