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💡 Light up smarter, not harder — never miss a moment in motion!
The Blackt Electrotech BT31C is a ceiling-mounted PIR motion sensor designed for professional and residential spaces. Featuring a 7-meter detection range and 360° sensing angle, it intelligently activates connected lights and appliances only when motion is detected, with adjustable delay and ambient light sensitivity settings. Compatible with a wide range of lighting types and backed by a 2-year warranty, it offers energy-efficient automation with easy installation and reliable performance.
| ASIN | B0143JR3MG |
| Antenna Location | Residential and Commercial Spaces (Homes, Offices, Shops, Hospitals, Corridors, Bathrooms, Parking Areas) |
| Battery Description | Battery not included |
| Best Sellers Rank | #1,800 in Home Improvement ( See Top 100 in Home Improvement ) #2 in Motion Detectors |
| Brand | Blackt Electrotech |
| Built-In Media | manaul |
| Colour | white |
| Compatible Devices | Light, Fan |
| Country of Origin | China |
| Customer Reviews | 4.0 out of 5 stars 3,294 Reviews |
| Frequency | 50 Hz |
| Importer Contact Information | Blackt Electrotech |
| Item Dimensions D x W x H | 100D x 30W x 100H Millimeters |
| Item Type Name | Motion sensor |
| Item Weight | 160 Grams |
| Manufacturer | Blackt Electrotech, Blackt Electrotech |
| Manufacturer Contact Information | Blackt Electrotech |
| Maximum Range | 7 metres |
| Mfr Part Number | BT-31C |
| Model Number | BT-31C |
| Mounting Type | Ceiling Mount |
| Packer Contact Information | Blackt Electrotech |
| Power Source | AC |
| UPC | 710918665283 |
| Unit Count | 1 Count |
S**L
Adjustability
Highly recommended light sensor. Love its configuration, one can customise both daylight sensitivity and time. I have routed my entire parking lights through this sensor.
B**H
Good
Good sensor, work perfectly, I have used in my Car Shed, it's working perfectly. Range is good.
R**N
Worth every penny
Bought this is June 2017, worked very well for 9 years. just now in July 2026 its started malfunction. Now planning to buy the same product to replace the old one.
J**H
Good
Items is good
Y**N
Not reliable
Stopped working in less than 6 months.. no way to get in touch for warranty claim
S**M
works well but for around a year or so. Warranty is useless.
I have purchased 10s of these devices for my house. The sensor works well for about a year or so and then stop working. With me it keeps the light on without any motion. The lights is switched off for a second and then opens again even if there is no one. I have replaced the sensor almost 3 times. Warranty is for 2 years, but when i contacted the company they asked me to record a video of fault and then courier the device to them and then they will check and send a replacement after a month. The courier cost was more than 200 and I found it to be more of a hassle than to buy a new one.
M**U
Value for money
Amazing product work really well. Good quality plastic material
D**I
Best product
Good
Trustpilot
3 weeks ago
2 weeks ago