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Electronic air flow monitor for monitoring fans, control flaps, humidifiers and electrical heating registers in accordance with DIN 57100, part 420 as well as for use with DDC systems. The assembly is carried out on the duct with the included in the scope of delivery Mounting flange.

Electronic air flow monitor for monitoring fans, control flaps, humidifiers and electrical heating registers in accordance with DIN 57100, part 420 as well as for use with DDC systems. The assembly is carried out on the duct with the included in the scope of delivery Mounting flange.

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.
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  • Art.-Nr.: G8000429

    Technical data

    can be read offNo
    on-delay time120s
    number of switching stages10
    rated impulse voltage4000V
    operating voltage230 V AC / 50 Hz
    width136mm
    wire break or measurement circuit monitoring20s
    adjustable tripping value for flow with fluids0,2m/s
    adjustable tripping value for flow with gases10m/s
    electric connectionscrew terminals
    with explosion protectionNo
    sensor elementhot film anemometer
    height69mm
    bearing temperature, upper value70°C
    bearing temperature, lower value-10°C
    length of sensor165mm
    housing materialplastic
    max. sensor temperature90°C
    maximum switching voltage230 V AC, 50 Hz
    maximum switching current8 А
    mediumair, not aggressive
    medium temperature90°C
    medium temperature-20°C
    probe integrated in the deviceYes
    min. sensor temperature-20K
    with displayNo
    included with probeYes
    switching difference, can be adjustedYes
    switching contact2 two-way contacts
    potential free switching contactYes
    type of protectionIP65 housing side, IP 54 sensor
    protection classII, following appropriate mounting
    depth85mm
    transistor output15s
    ambient temp. for evaluation electronics up to50°C
    ambient temp. for evaluation electronics from0°C
    degree of contamination2
    Circuit diagram Circuit diagram

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