Differential pressure relay 40-400Pa | 1.5A (0.4A) | 250V | IP54

Technical Specifications
Operating Medium: Air, non-flammable, and non-aggressive gases
Pressure Range: 40-400Pa 
Differential: 20 Pa
Accuracy Deviation: ≤15%, at least ±10 Pa
Maximum Working Pressure: 10 kPa
Mounting Position: Diaphragm in any vertical plane
Protection Class: IP54 (with cover)
Operating Temperature: -20°C to +85°C
Contact Type: SPST or SPDT
Electrical Specifications:
Resistance: <400 mΩ (initial stage)
Current: 1.5A (0.4A) @ 250V
Terminals: 6.4 mm (0.25") copper alloy
Connection: 6.0 mm diameter tube fitting
Certifications: UL, CE
Features and Benefits
Precise Differential Pressure Measurement: Detects even minor pressure changes in ventilation systems, ensuring effective airflow and filter condition monitoring.
Adjustable Switching Pressure: Allows manual adjustment of the switching point without additional measuring instruments.
IP54 Protection with Transparent Cover: Shields the switch mechanism from dust and moisture, increasing durability.
Universal Mounting: Can be installed in any vertical plane, making it adaptable to various systems.
Wide Application Range: Suitable for industrial and commercial heating, ventilation, and air conditioning (HVAC) systems.
Applications
Air heaters and fans – Prevents overheating, monitors airflow.
Industrial electronics cooling systems – Accurately monitors air filter conditions.
HVAC systems – Controls pressure in ducts, regulates dampers.
Positive pressure rooms – Maintains constant pressure in controlled environments.
Freeze protection – Prevents damage due to insufficient airflow.
Pros:
Accurate and sensitive pressure detection – Detects small changes.
Easily adjustable switching point – No additional devices needed.
Environmental resistance (IP54) – Protected against dust and moisture.
Versatile mounting – Suitable for various systems.
Wide operating temperature range (-20°C to +85°C) – Works in extreme conditions.
UL and CE certified – Meets high-quality standards.

Cons:
Suitable only for air and non-flammable gases – Not for aggressive chemicals.
Vertical mounting only – May require specific installation setup.
May require additional calibration – For low-pressure values, settings may need adjustment.

A reliable and easily adjustable differential pressure switch, ideal for precise airflow and pressure monitoring in various industrial and commercial systems!