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    Digital Differential Pressure Sensor for Air

    Digital differential pressure sensor is used to measure the difference in pressure between two points in a gas or air system. This low price pressure transducer comes with 12~36V DC power supply, optional measuring range from -100kPa to 100kPa, output signal of 4-20mA, 0-5V, 0-10V, RS485, and connection thread 8mm, 6mm, or 4mm, which is widely used in HVAC systems and industrial automation.
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    Digital differential pressure sensor works by detecting the pressure differential between these two points and converting it into an electrical signal, which can be used for monitoring, control, or data acquisition purposes. This pressure transducer finds applications in various industries, such as HVAC systems and industrial automation, where accurate pressure monitoring and control are essential for maintaining optimal system performance and safety.


    • Model: ATO-ALS-DIGITAL
    • Measuring Range (Optional): -100kPa~100kPa
    • Output Signal (Optional): 4-20mA, 0-5V, 0-10V, RS485
    • Connection Thread (Optional): 8mm, 6mm, 4mm
    • Power Supply: 12~36V DC
    • Compensation Temperature: -10~70℃
    • Measuring Accuracy: 0.5%FS, 0.2%FS, 0.1%FS
    • Working Temperature: -20~70℃
    • Long-Term Stability: ±0.2%FS/year
    • Measuring Medium: No Corrosive Air
    • Overload Pressure: Minimum Withstand Pressure 2kPa, Maximum Withstand Pressure Less Than 2.5 Times of Measuring Range

    Dimension (Unit: mm)

    Digital differential pressure sensor dimension

    Wiring Diagram

    Air differential pressure sensor wiring diagram

    Tips: How does a differential pressure sensor work?

    A differential pressure sensor measures the difference in pressure between two points in a fluid system. It typically consists of a diaphragm or a flexible membrane exposed to the fluid on both sides. When the fluid pressure at one side of the diaphragm differs from the other, it causes the diaphragm to flex. This flexing generates a mechanical displacement that is converted into an electrical signal.

    Commonly, two pressure ports are connected to the sensor, one on each side of the diaphragm. The pressure difference between these ports causes the diaphragm to move, which changes the capacitance, resistance, or piezoelectric properties of the sensor, thereby generating a measurable electrical signal. The magnitude of the signal correlates with the pressure differential, allowing for precise pressure measurements. Differential pressure sensors are used in various applications, including airflow measurement, liquid level monitoring, and industrial process control.

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