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Pressure Switch

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General purpose pressure switches are versatile industrial devices designed for pressure monitoring and control in standard operating environments. They automatically trigger electrical signals when the system pressure reaches a preset threshold, enabling equipment start/stop control and safety protection. These pressure switches are known for their simple structure, reliable performance, and cost-effectiveness. They are widely used in air compressors, water treatment systems, hydraulic and pneumatic equipment, HVAC systems, and general industrial automation applications. General purpose pressure switches are available in a variety of pressure ranges, thread connections, and electrical connection options (such as cable output or standard connectors), making them suitable for diverse OEM and industrial requirements. As a fundamental component in industrial control systems, general purpose pressure switches help improve operational safety, system stability, and overall efficiency.

STP01 Industrial Electronic Pressure Switch PNP Output

Hydraulic systemsHydraulic and pneumatic systemsConstruction machineryIndustrial equipment
  • Pressure Range:0.1 to 600Bar
  • Accuracy:±0.5%F.S.
  • Process Connection:G1/4, M14×1.5, 1/4 NPT, M12×1, or customized options
  • Output Signal:PNP (transistor switching output)
  • Electrical connection: M12×1 connector, protection rating IP67
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STP10 Adjustable Mechanical Pressure Switch

Railway braking systemsWind power hydraulic systemsConstruction machineryHydraulic pressesMedical equipmentSemiconductor equipment
  • Applicable media:Water, oil, gases
  • Measuring Principle:Diaphragm type(overpressure resistance up to 250 bar), piston type(overpressure resistance up to 600 bar)
  • Operating temperature range:-40 to +80°C
  • Switch Type:Mechanical pressure switch (SPDT contact mechanism)
  • Switching Range:0.2–420 bar
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Frequently Asked Questions (FAQ)

Q1: What environments are IP67 pressure switches suitable for?

IP67-rated pressure switches are dustproof and water-resistant, suitable for harsh environments such as humid, dusty, or outdoor industrial applications.

Q2: Why are accuracy and response time important for pressure switches?

High accuracy (e.g. ±0.5% FS) ensures stable control, while fast response time allows timely triggering of protection systems, preventing equipment damage.

Q3: Can a general purpose pressure switch be used in air compressor systems?

Yes, general purpose pressure switches are ideal for air compressor systems, enabling automatic start/stop control, improving efficiency, and ensuring safe operation.

Q4: What is the difference between PNP and NPN pressure switch outputs?

PNP output provides a positive signal and is widely used in PLC systems, while NPN provides a negative signal. PNP is more common in industrial automation. The choice depends on your control system.

Q5: How to choose a pressure switch for hydraulic systems?

When selecting a pressure switch for hydraulic systems, consider pressure range (e.g. 0–600 bar), output type (PNP/NPN), process connection (G1/4, NPT), accuracy, and protection rating (IP67) to match your application.

Q6: What is a general purpose pressure switch and where is it used?

A general purpose pressure switch is an industrial device used for pressure monitoring and control. It outputs a switching signal when pressure reaches a preset value. It is widely used in hydraulic systems, pneumatic systems, air compressors, water treatment, and industrial automation.

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