RADAR motion sensor for lights, small diameter electrical box?

[walta]

So this is my story I like the idea of motion sensor lights but I have not liked the way the infrared sensors (PIR)have worked for me(fails to detect too often). This has me looking at the alternate sensors. The wife brought home some LED shop lamps from Costco 2-3 years ago I was not interested in there motion sensor at the time but I was testing it this lamp would turn on the light before I enter the room. In fact it turned on the light before I opened the door. It was sensing my motion thru the wall before I got near the door this thing works on RADAR. I have been using this light with a sensor and I like it.

I was looking for just the RADAR sensor I could wire to my porch lights and I found one. I have been testing it I think it will be great but I have one problem. The base of this sensor is smaller than a round electrical box. The sensors base is 3 5/8” or 93 mm and my box is 4”or 102mm

Is there such a thing as a small diameter electrical box? Or will I be making an cover plate to go in between the box and the sensor?


https://www.amazon.com/gp/product/B07BWFF2GQ/?tag=atomicindus08-20

The RADAR is not for every location because it senses 20 feet in every direction. So if is in your basement the light would come on whenever you walked on the floor above the sensor. The sensor works on frequencies close the some WIFI systems so it could make some problems.


Walta

 

[TRWham]

There are 3" pancake boxes.

 

[walta]

Thanks once I knew 3 inch was a size I found 3 inch boxes in stock at my local Lowes

https://www.lowes.com/pd/CARLON-1-G...ndard-Round-Ceiling-Electrical-Box/1000111209

Walta

 

[cybrdyke]

Radar is a marketing term, as these types of sensors do not actually work using radar. Microwave is the more accurate word to use to describe these. This new type of sensor is rapidly taking over the sensor industry and will soon be more common than ultrasonic and passive infrared. As with almost any technology, there are pros and cons. One great feature of microwave sensors is that they dont need line-of-sight nor do they need to be out in open where they can deliver sound waves. They can be mounted inside of lighting fixtures, behind the lens, out of sight, and still perform better than other types of sensors. They also can be "tuned" so that their range can be limited or expanded. They're great sensors and will soon be commonplace.
CD

 

[walta]

Radar is a marketing term, as these types of sensors do not actually work using radar. Microwave is the more accurate word to use to describe these. This new type of sensor is rapidly taking over the sensor industry and will soon be more common than ultrasonic and passive infrared. As with almost any technology, there are pros and cons. One great feature of microwave sensors is that they dont need line-of-sight nor do they need to be out in open where they can deliver sound waves. They can be mounted inside of lighting fixtures, behind the lens, out of sight, and still perform better than other types of sensors. They also can be "tuned" so that their range can be limited or expanded. They're great sensors and will soon be commonplace.
CD

Am I wrong in thinking that this sensor transmits microwave frequency pulses and looks for changes in the returning signal.

Radar is an acronym for "radio detection and ranging”

Most RADAR systems operate on microwave frequencies.

If you have any links for other sensors that use this technology I would like to see them.

I would feel better if I could find a name branded product with a UL label.


Walta

 

[cybrdyke]

https://d163axztg8am2h.cloudfront.net/static/doc/a1/64/da96788844b253e8ae434b2a919d.pdf

http://www.hynall.com/