A pressure switch is a robust and sensitive instrument that, upon detecting variations in pressure, activates or deactivates an electrical switch when reaching a predefined pressure point, also known as Trigger Point or Setpoint. This device is essential in numerous industrial processes, since it allows controlling and maintaining the appropriate pressure in critical systems and machinery.
Pressure switches can be configured with mechanical or electrical contacts, with or without visual indicators, and offer a variety of adjustment options to suit different needs and work environments. With a wide portfolio available, you will always find the ideal pressure switch for your specific application within our offer.
Contact types
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SPST |
SPDT |
DPDT |
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(Simple polo, simple shot) The outlet has a single connection point on each end of the outlet (like a light switch). |
(Single pole, double shot) The contact has one common connection point and two output circuit connections. One circuit operates when the pressure is low and another when the pressure is high. |
(Double pole, double throw) Two SPDT contacts; It takes place using 2 simultaneously activated SPDT switches. |
Pressure Switch Terminology
- Trip point or Setpoint: It is the specific pressure at which the snap action switch is activated to open or close the electrical circuit.
- Adjustable range: It is the range in which the trip point of a pressure switch or pressure switch can be set to operate. That is, you can adjust in what pressure range you want the device to activate.
- Deadband: This is the difference between the point at which the pressure switch activates and the point at which it deactivates. For example, if the pressure switch has been set to operate at 300 psi, then it will activate when the pressure reaches that level. If the pressure drops to 290 psi, the pressure switch will activate again (this is the reset point). The deadband in this case would be 10 psi.
The mechanical contacts are micro switches with adjustable hysteresis, which stand out for their electrical power, up to AC 250V / 20A, which allows direct switching in processes, such as a pump.
Electromechanical pressure switches can come in factory-set models, have blind adjustment capability, or offer field calibration adjustment.
Selection:
- Pressure type: Vacuum / Relative pressure / Differential pressure / Absolute pressure.
- Explosion proof (Ex) application area: Non-Ex / Ex i / Ex d.
- Types: Electronic / Stainless Steel / Compact / Compact explosion-proof / Tubular spring / Membrane.
These are some references that we handle:
Winters Brand
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4WPS Series Medium pressure switch |
7WPS Series
Explosion-proof medium pressure switch |
WPS Series
Pressure switch Commercial differential |
9WPS Series Compact explosion-proof pressure switch |
| Cast aluminum housing.
Pressure range from 2 to 100 psi. Fixed dead band or adjustable band. |
Cast aluminum housing.
Pressure range from 2 to 100 psi. Fixed dead band or adjustable band. |
Its compact size allows installation in areas with little space.
Differential pressure ranges: 0.08 to 16.0 inchH2O (20-4,000 Pa). |
Suitable for hazardous areas.
Pressure range from 0 to 5000 psi. Wetted parts SS 316. |
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WIKA brand
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PSD-4 type Electronic pressure switch with display |
MW type
Membrane pressure switch |
DA, DA10 types
Differential pressure switch |
PCS Type
Compact pressure switch |
| An excellent solution for automation tasks, due to its high accuracy of 0.5%, its configurable output signals (PNP/NPN, 4 … 20 mA/0 … 10 V), its ease of scaling the analog output to 5:1 and its extensive self-diagnosis capacity. | These high-performance mechanical pressure switches are special developments for safety-critical applications. The great advantage of mechanical pressure switches is that no auxiliary power is required for switching. | With Ex d anti-explosive protection.
No auxiliary power is needed for switching electrical loads. Robust switch housing made of aluminum alloy or 316L stainless steel, IP66, NEMA 4X. |
Robust switch housing made of aluminum or stainless steel. Adjustment ranges from 0.2 … 1.2 bar to 200 … 1,000 bar, vacuum ranges. Intrinsic safety Ex i. |
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Applications:
Pressure monitoring, direct activation of electrical charges and process control.
Instrumentation of processes in the chemical and petrochemical, oil and gas industries. Power generation including nuclear power plants, water treatment, wastewater, mining.
Safety critical applications in the field of process instrumentation in general, especially in the chemical and petrochemical industry, oil and gas, power generation, including nuclear power plants, water supply and wastewater management, mining companies.
For gaseous and liquid, aggressive and highly viscous or contaminated media, also in challenging environments.
For measurement points in small spaces.
Applications in hydraulics and mobile hydraulic systems, pneumatics, plastic injection machines, machinery and technical installations.