These barriers generate an invisible three dimensional microwave beam that passes between a transmitter and a receiver.
They are specifically designed for external use but are subject to nuisance alarms being generated by animals, vegetation, severe weather conditions and objects blowing in the wind. Some systems use a form of “fuzzy logic” to reduce these alarms by analysing the disturbance in the microwave field and comparing it to known models of behaviour.
Microwave barriers are available with different range capabilities (maximum physical distance between transmitter and receiver). These are 50, 80, 120 and 200 metres.