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🚀 Elevate your space with smart, energy-saving motion detection — never fumble for the switch again!
The Blackt Electrotech BT31C is a ceiling-mounted PIR motion sensor offering 7-meter detection range and 360° sensing angle. It features adjustable delay times (10 seconds to 7 minutes) and ambient light sensitivity (3–2000 lux) to optimize energy efficiency. Compatible with a wide range of lighting and appliances, it activates only when motion is detected and ambient light is low, ensuring smart, automatic control. Designed for easy installation in homes and commercial spaces, it comes with a 2-year warranty for 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 | #2,392 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 3,296 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 |
| Number of Items | 1 |
| 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
1 month ago
3 days ago