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  • Differential pressure relay 100-1000Pa | 1.5A (0.4A) | 250V | IP54

    Code: ESLF32-11

    The adjustable air differential pressure relay is a high-precision pressure sensor designed to detect the smallest pressure changes in ventilation and heating systems. Its compact design and construction allow it to be used in various industrial and commercial applications.
    The pressure switching point can be easily adjusted without a manometer—simply turn the adjustment knob and follow the built-in visual scale. A transparent protective cover not only prevents unintended adjustment of the knob but also ensures an IP54 protection rating.
    The air pressure relay is widely used in ventilation, heating, and air conditioning systems where precise airflow monitoring is required. It can also be used as an adjustable pressure switch or an adjustable vacuum switch. 

  • Technical Specifications
    Operating Medium: Air, non-flammable, and non-aggressive gases
    Pressure Range: 100-1000Pa 
    Differential: 50 Pa
    Accuracy Deviation: ≤±15% 
    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! 

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.
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