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Electronic air flow monitor for mounting on the air duct.


Electronic air flow monitor for mounting on the air duct.

The WSERD air flow monitor is suitable for monitoring fans, control flaps, humidifiers and electrical heating registers in accordance with DIN 57100, Part 420 and for use with DDC systems. The air flow monitor works according to the calorimetric principle. The extraction of heat by the air flow is measured and converted into the switching value. The sensor contains a heating element and two temperature sensors. A microcontroller controls the heating and measures the temperature differences. From the stored calibration curves, it calculates the air flow speed and transmits the value serially to the control unit. Here another microcontroller determines the switching behavior of the two relays from the default values ​​of the setting controls.
  • Art.-Nr.: G8000429

    Technical data

    Adjustable tripping value for flow with fluids0,2 m/s
    Adjustable tripping value for flow with gases10 m/s
    Ambient temp. for evaluation electronics from0 °C
    Ambient temp. for evaluation electronics up to50 °C
    Bearing temperature, lower value-10 °C
    Bearing temperature, upper value70 °C
    Can be read offNo
    Degree of contamination2
    Depth85 mm
    Electric connectionScrew terminals
    Height69 mm
    Housing materialPlastic
    Included with probeYes
    Length of sensor165 mm
    Max. sensor temperature90 °C
    Maximum switching current8 A
    Maximum switching voltage230 V AC, 50 Hz
    MediumAir, not aggressive
    Medium temperature-20 °C
    Min. sensor temperature-20 K
    Number of switching stages10
    On-delay time120 s
    Operating voltage100-240 VAC oder 24 V AC / DC
    Potential free switching contactYes
    Probe integrated in the deviceYes
    Protection classII, following appropriate mounting
    Rated impulse voltage4000 V
    Sensor elementHot film anemometer
    Switching contact2 two-way contacts
    Switching difference, can be adjustedYes
    Transistor output15 s
    Type of protectionIP65 housing side, IP 54 sensor
    Width136 mm
    Wire break or measurement circuit monitoring20 s
    With displayNo
    With explosion protectionNo
    Circuit diagram Circuit diagram


    Info sheet

    Assembly instructions



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