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Airwave Switches
Application areas of Airwave Switches
Airwave Switches or DW switches are used to safeguard gates in industrial environments. These systems are also used in local public transport, to secure bus and train doors and as switching signal transmitters for various machine applications. The latter is particularly suitable where the signal transmitter and the actual electrical switching process need to be separated. For example, in counter-current systems in swimming pools or in certain medical technology applications.
in stock
delivery time: Not available
delivery time: 6-10 working days
How Airwave Switches work
The way Airwave Switches work is simple: a pressure wave generated in a signal transmitter is directed to the switch, where it causes the switching diaphragm to deform. The switching contact attached to the membrane leads to the opening or closing of an electrical contact, depending on the switch version.
Airwave Switch on the door
When used on gates, pressure changes are detected along a sensitive, soft rubber profile attached to the edge of the gate. If a door starts to close and an obstacle comes into contact with the signal transmitter, which is located on the edge of the door, the Airwave Switch registers the resulting pressure wave. Even a slight change in pressure of approx. three mbar is enough to trigger the signal transmitter. This signal stops and reverses the door to prevent a collision and possible injury or damage.
The use of Airwave Switches on doors may only be used in combination with a suitable and certified door control unit, as the function of the Airwave Switch must be tested regularly by the door control unit.
Alternatives for securing gates
Airwave Switches have been used to protect gates for many years. However, today there are various, more modern safety edge technologies with various advantages over DW safety edges. An overview and functional description of resistive edges and optical sensing edges can be found in the corresponding blog post on doorautomation24.