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MEMS Air Flow Sensor alternate to Honeywell sensor AWM720P1

Product number: S4000

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    S4000 series of gas flow sensors are specially designed for the measurement of medical gas flow and process control, which based on the MEMS flow sensor core technology , and applied to the kinds of clean and dry gas flow measurement with achievements of facility digitalization, intelligence and high safety compared to the traditional industry. S4000 series have the property of wide range of flow measurement which satisfy different flow measuring requirements with high sensitivity, high reliability and stability and low cost.
    S4000 series promotes to development for more intelligence and energy saving.




    oxygen machine,

    Gas mask and respirator,


    Continuous positive airway pressure (CPAP) device,

    Anesthesia delivery,

    Leak detection,


    Mass flow controller,

    Environmental climate control,

    Fuel cell control



    Wide flow range 0-500SLPM
    High precision (1.5% F.S accuracy)
    Linear output and temperature compensation
    Maintain long-term stability with minimal zero drift
    Solid-state sensing core (no surface void or fragile membrane), anti-blocking and pressure shock
    Analog output (1 to 5 V) (I2C output is also available)
    Fast response time (20ms response time)


    Maximum rating

    Working temperature: -25 ° C to 85 ° C
    Storage temperature: -40 ° C to 90 ° C

    Humidity: 0~100%RH*
    Impact resistant 100 g
    The sensor is resistant to condensation


    Function Paremeters

    1. Customizable range between 10SLM and 500SLM
    2. SLM: Standard liters per minute. Standard conditions: 0 ° C and 1 atmosphere
    3. In addition, the two-way airflow test can be customized, and the analog output is correspondingly changed. F(min)—F(max) corresponds to 1-5V output, and 0 flow corresponds to 3V;
    4. Includes temperature drift and linearity error
    Linear Output
    1. The unidirectional airflow mode: (calculation formula)
    Flow = [(VOUT -1 V) / 4 V] × full scale flow
    For example: S4103V has a full-scale flow of 200 SLM. When the output voltage is read at 2.5V,
    the instantaneous flow rate is [(2.5V-1V) / 4V × 200 SLM] = 75 SLM

    2. Two-way airflow mode: (calculation formula)
    Forward flow = [(VOUT -3 V)/2 V] × full scale flow
    Reverse flow = [(3 V- VOUT)/2 V] × full scale flow
    Shell Size
    Note 1: The connector can be matched with a connecting line according to customer requirements.