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How to Select the Right Mechanical Pressure Switch?

2026-11-12

Selecting the correct pressure switch requires consideration of the actual operating environment and control requirements.

The following factors should be evaluated:

1. Pressure Range

Determine the normal operating pressure, required switching point and maximum system pressure. Do not select a model based only on the desired switching pressure.

2. Switching Point

Identify the pressure at which the electrical contact should activate or deactivate.

3. Contact Configuration

Check whether the control circuit requires:

NO (Normally Open)
NC (Normally Closed)
SPDT (Single Pole Double Throw), if supported by the model

4. Process Connection

Confirm the required thread type, connection size and installation method.

5. Medium Compatibility

Consider whether the medium is water, air, oil, gas or another industrial fluid. Wetted materials and sealing materials must be compatible.

6. Environmental Conditions

Evaluate ambient temperature, vibration, humidity, dust, corrosion and required enclosure protection.

7. Electrical Requirements

Confirm the switching voltage, current and electrical load compatibility before connecting the device.

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