Microwave Sensors- How do they Work?

February 15, 2021 1:25 pm Published by

They have two main functions, sensor movement and daylight.

What’s the difference between Microwave and PIR sensors?

 

PIR’s use passive infrared beams much like you have for your TV. As you will have understood the beam is fairly narrow and unless you point it directly at your TV it doesn’t work. Detecting body heat rather than movement they will work efficiently in smaller spaces. The further you are from them there is a wider non sensing area.

 

A Microwave sensor uses high frequency radio waves operating at 360 degrees. They work in a similar way to radar, working on changes in the reflected radio waves. They are especially effective  in Large areas such as Warehouses monitoring any changes in the return waves and responding immediately.

 

Other advantages of a Microwave Sensor is they have multiple settings which can be carried out remotely using a key pad. For example they will sense daylight levels as well as movement and also dim lights if required rather than just on or off. Mainly the lights do what you want and when you want it, stopping you wasting energy “when there’s no one around or in bright daylight, saving you  energy automatically”.

 

In addition as they a solid state electronics they have a lifetime up to 100,000 hours!

 

In the illustration you can see how they work, by using them with LED Lighting lights are turned on instantly with no warmup period, and going off when you need them too.

 

For a lighting plan in your premises feel free to contact our helpline for advice. 03333 446084

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This post was written by Paul Young