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💡 Illuminate Smarter, Save Bigger — Never Miss a Beat with Blackt Electrotech BT31C!
The Blackt Electrotech BT31C is a ceiling-mounted PIR motion sensor designed for precise, energy-efficient lighting control. Featuring a 7-meter detection range and 360° sensing angle, it supports a wide range of lighting types and appliances. With adjustable delay times and ambient light sensitivity, it ensures lights activate only when needed, reducing energy waste. Easy to install and backed by a 2-year warranty, it’s perfect for modern homes and commercial spaces aiming for smart automation and sustainability.
| Antenna Location | Residential and Commercial Spaces (Homes, Offices, Shops, Hospitals, Corridors, Bathrooms, Parking Areas) |
| Asin | B0143JR3MG |
| Battery Description | Battery not included |
| Best Sellers Rank | #1,558 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 4.0 out of 5 stars (3,305) 4.0 out of 5 stars |
| 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 |
| Unit Count | 1 Count |
| Upc | 710918665283 |
User
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.
User
Good Product
Received it yesterday (14-Dec-2020).. Bought it as a try out to check its quality before buying more. Connected it to the common hand-wash area in the hall as kids mostly forget to switch off the lamp there. Working perfectly as expected. I have not tried it our in the open for day night auto detection yet. That;s why rating it as at 4 as of now. Will update the status of its working quality in the coming months.
User
Good
It does not function as per the requirement. Light comes on auto ON/OFF during day time also. Day/night setting not functioning. Hence request return of the item.I am reviewing again after completing replacement. Tested and found satisfactory. Thank you
User
Value for money
Amazing product work really well. Good quality plastic material
User
Doesn't power off stays on all the time
Doesn't work
User
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.
User
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.
User
Best product
Good
Trustpilot
2 weeks ago
3 weeks ago