The air flow switches are designed to control the air flow or non-aggresive gas flow in tubes and pipes for example in air conditioning systems or heating installations.

When the air flow of the pipe pulls the Stainless Steel blade actuates a microswitch. This microswitch is inside the plastic housing and actuates according to the sensitivity adjustment.

The switch can be horizontally or vertically mounted and the indication arrow located in the process connection must be faced to the flow direction.

The device has a flange process connection and can be mounted using screws, rods, fasteners or nuts.


Approximate measures given in mm.

Technical data

NameAir flow switch
TypeFA – ref: 2620
Maximum pressureAtmospherical
Cable entryM20x1,5
Maximum voltage250 V AC
Contact function1 NO + 1 NC
Capacity of the contact15 A / 24 – 250 V AC (resistive load)
For capacitive or inductive loads
reduce at 50%
Temperature range-40° C – +85° C
Max. ambient temperature +60° C
Increasing flow speed2,5 m/s – 8 m/s
Decreasing flow speed1 m/s – 9,2 m/s
ProtectionIP65 according DIN EN60529
Weight0,63 Kg
CapTransparent Polycarbonate
BladeStainless Steel 1.4310
Proccess connectionBrass
Fixing gasketKlingerit
Blade supportBrass

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