Outback PS2540 Normally Open Reverse-Acting Pressure Switch (Range 2.5-4.0 BAR)
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The Outback PS2540 Pressure Switch is a normally open, reverse-acting pressure switch designed for automatic control of pumps in pressure and water transfer systems. Operating within an adjustable 2.5–4.0 BAR range, it provides reliable switching based on system pressure — ensuring pumps start and stop exactly when required.
This switch is commonly used in applications where a pump must start when pressure drops and stop once target pressure is reached, making it ideal for tank fill systems, pressure boosting setups, and automated transfer installations.
Built for reliability and repeatable performance, the PS2540 is suited to both solar and conventional pump systems where dependable pressure-based control is critical.
Incorrect pressure switch selection is a common cause of poor pump performance and system faults. The Outback PS2540 is specifically chosen for applications requiring reverse-acting logic, ensuring stable pressure control and reliable automation.
For installers and system designers, it delivers predictable operation, reduced cycling issues, and long-term dependability — especially important in remote or unattended pump systems.
How It Works (Normally Open & Reverse-Acting Explained)
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Normally Open (NO):
The switch circuit remains open when no pressure is present. -
Reverse-Acting:
As system pressure drops, the switch closes and starts the pump.
As pressure rises to the set cut-out, the switch opens and stops the pump.
This logic makes the PS2540 ideal for systems that must maintain a pressure range automatically without constant user intervention.
Technical Overview
- Model: PS2540
- Switch Type: Normally Open (NO), Reverse-Acting
- Pressure Range: 2.5 – 4.0 BAR (adjustable)
- Function: Automatic pump control via pressure sensing
- Application: Pressure systems, tank filling, water transfer
- Compatibility: Solar pump controllers and conventional pump circuits
Key Benefits
- Normally open, reverse-acting design for pressure-based pump control
- Adjustable 2.5–4.0 BAR operating range
- Reliable automatic pump start/stop operation
- Suitable for solar and electric pump systems
- Compact, installer-friendly design
- Ideal for pressure boosting and tank fill systems
Applications
- Automatic tank filling systems
- Pressure boosting installations
- Solar pump pressure control applications
- Systems requiring pump start on pressure drop
- Retrofit upgrades replacing worn or unreliable switches
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