What is Microwave Sensor?

Why use a microwave sensor? From Fern Howard Ltd

Microwave Sensors detect movement by sending out electromagnetic pulses and measuring the changes in frequency due to reflecting off- a moving object.

How it works?

Choosing between presence and absence detection can make a significant difference to user-friendliness and energy saving. With presence detection all movement is detected (including that from trees and animals if installed outdoors).

Presence Detection (auto ON and auto OFF)

Presense detection
Detectors switch on lighting automatically when a person enters a room.
presense detection_2
Lighting remains switched on as long as movement is detected.
Presense detection 3
Lighting is switched off automatically when no movement is detected.

Absence Detection (manual ON and auto OFF)

absense detection_1
Upon entering a room the person switches on the light as normal.
absense detection_2
Lighting stays on as long as a presence is detected.
absense detection_3
Lighting is switched off automatically when no further movement is detected.