Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted

Works as expected and detects motion, good quality and easy to install.

An impressive PIR (Passive Infrared) motion sensor. Has a very good response time. Triggers the sensor when a heat emitting body moves in its detection field (works fine for 160+ degree coverage & up to 10-11 meters distance). A problem which I noticed was that minor motions, even human, are ignored and if the device is connected to a light in a room you will have to make serious motions between the set time period or else the sensor won't trigger. So if you are powering a light source with this sensor in a computer room you will have to wave your hand or make some sort of motion within the set time delay or else the sensor will trigger off.

I have been using it for the last more than 10 years in my home balcony facing main road. I brought it from Europian country Hungary. It provides light to pedestrians at night. It lightup as soon as the person comes in its range and then automatically switches off after some time. Since there was no street light when I installed it proved very useful and economical.

Sensor has not a wide angle. It works only when someone is moving infront of this. The wide angle is less than 30 degrees.Sensor doesn't work if kept over 4 meters range. I have installed it in my gallery of 10 meters but it only works when you are at a distance of around 4 metres or less.Motion sensing is slow. If you run infront of it, it doesn't work. The lights are on after a delay of 2 seconds.

Don’t ever buy this product try to get different brand with warranty in case any issue so you can return. The company claim sensor range is 12meter but it’s not even working for 3meter. I bought two only used one and got bad result and tried to return second one but company is saying no return. Avoid buying this brand.

there are very few things which work 100 percent they are advertised.and this is one of those.It is easy to install if you can read and know live and neutral in electricty..And its motion sensing is great..has adjustment of timer and luminous which works great.I am enjoying this switch in my walk in closet where everytime i used go for a few seconds ,i had to turn on switch of light now this little switch (which looks like camera though) does that job for me..I am enjoying it.

Good product..Very useful

I had bought a similar item five years back. It had worked well all these years, and when the need arose for another I had no difficulty in deciding what to buy. This device is accurate, it is customisable and sending direction can be adjusted to a large degree.