--- product_id: 64722851 title: "Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted" brand: "blackt electrotech" price: "€ 15.91" currency: EUR in_stock: true reviews_count: 9 category: "Blackt Electrotech" url: https://www.desertcart.pt/products/64722851-blackt-electrotech-bt31w-pir-sensor-motion-sensor-energy-saving-motion store_origin: PT region: Portugal --- # Adjustable timer 10s-7min 1200W max load capacity 360° ceiling & 180° wall detection Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted **Brand:** blackt electrotech **Price:** € 15.91 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your space with motion-sensing brilliance—because smart energy is the new luxury. ## Quick Answers - **What is this?** Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted by blackt electrotech - **How much does it cost?** € 15.91 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/64722851-blackt-electrotech-bt31w-pir-sensor-motion-sensor-energy-saving-motion) ## Best For - blackt electrotech enthusiasts ## Why This Product - Trusted blackt electrotech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Energy Saver:** Automatically cuts power when no motion is detected, slashing your electricity bills without lifting a finger. - • **Precision Detection:** Customizable sensitivity up to 8 meters and brightness control up to 2000 Lux for zero false alarms in any environment. - • **360° & 180° Coverage:** Full-room awareness with 360° ceiling and 180° wall detection angles—never miss a movement in hallways, bathrooms, or corridors. - • **Heavy-Duty Compatibility:** Supports up to 1200W incandescent and 300W LED loads, perfect for diverse lighting setups in professional and home spaces. - • **Plug & Play with Confidence:** Compact design with easy wall mounting and backed by an 18-month warranty for hassle-free, long-term reliability. ## Overview The Blackt Electrotech BT31W is a high-performance PIR motion sensor designed for energy-efficient lighting control. Featuring adjustable sensitivity (1-8m), customizable brightness (0-2000 Lux), and wide detection angles (360° ceiling, 180° wall), it supports heavy loads up to 1200W incandescent and 300W LED. Ideal for residential and commercial spaces, it offers automatic energy saving with a timer delay of 10 seconds to 7 minutes, compact wall-mount design, and an 18-month warranty, making it a reliable, smart upgrade for modern energy management. ## Description Product Description Blackt electrotech pir motion sensor The product is new energy saving device, it adopts good sensitivity detector, itegrated ckt. It gathers automatism, convenience, safety,saving energy & physical functions. It works by receivging human motion infrared rays. Automatic light control sensor Pir motion sensor with light sensor Energy saving motion detector Wall mounted Easy installation PIR Motion Sensor With Light Sensor, Energy Saving Motion Detector Switch Use: Home, office, shops, hospitals, hotelas, bathroom, corridor, step, parking area. Specifications ​Operating Volt: AC 220-250V 50Hz-60Hz. Load power: Upto 300/1200W Max Ambient Light: 3-2000 (Adjuestable) Load type: Incandescent lamp, LED light, CLF, fans, etc Detecting distance: 10~12 Mtrs(Dept temp) Detecting Angle: 180 Degree. Installtion Hight: 2.2-4 Mtr Motion Detetion Speed: 0.6~1m/s Power Cusumption:0.1W (static) & 0.4(Work) Working Humidity: less than 93%RH Delay: 10 Seconds -7 Minutes (Adjustable) ​Product Installation Keep sensor unit 1.6 mtr higher from the ground level. The light, such as incandescent lamp which emits high heat should be kept from the switch aways, or it will be turn on/off voluntarily. On being fixed to the wire first time, the switch' initialization will take 1-2 minutes. It's natural for the switch to turn on/off voluntarily. When you install the switch on daytime, the default state of the switch will make the light off.Keep the detector of the switch from illumination, & then the light will turn on. The darker, the switch will be more sensitive. If it is not very sensitive, turn the yellow port counterclockwise with a long and thin tool to get a proper light sensitivity. ## Features - 🌟 [Automatic Energy Saving]: Equipped with a timer function to automatically turn off the sensor when no motion is detected, reducing electricity usage significantly. - 🔍 [Adjustable Sensitivity & Brightness]: Sensitivity range adjustable from 1 to 8 meters, with light brightness customizable between 0 to 2000 Lux for accurate detection without false alarms. Designed for seamless integration with an installation height of 2-4 meters. - 📏 [Wide Detection Angle]: Offers 360° ceiling and 180° wall detection, making it ideal for areas like hallways, bathrooms, closets, and corridors. - ⚡ [High Load Capacity]: Supports up to 1200W for incandescent and 300W for LED lights, suitable for various lighting setups. - 🔍 [Compact & Adjustable Design]: Designed for seamless integration into any space with a compact size of 12x12x6.5 cm and an adjustable installation height of 2-4 meters. - 🛡️ [18-Month Warranty]: Backed by 18 months of manufacturing warranty for reliable, worry-free usage. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00ZOZI17A | | Antenna Location | Residential Security, Commercial Security, Automation, Energy Management | | Battery Description | Battery not included | | Best Sellers Rank | #3,332 in Home Improvement ( See Top 100 in Home Improvement ) #6 in Motion Detectors | | Brand | Blackt Electrotech | | Built-In Media | Nuts | | Colour | White | | Compatible Devices | Light, Fan, Bulb, CFL | | Country of Origin | India | | Customer Reviews | 4.0 out of 5 stars 1,583 Reviews | | Frequency | 50 Hz | | Item Dimensions D x W x H | 9D x 8W x 8H Centimeters | | Item Type Name | MOTION SENSOR | | Item Weight | 200 Grams | | Manufacturer | Blackt Electrotech, Blackt Electrotech | | Manufacturer Contact Information | Blackt Electrotech | | Maximum Range | 12 metres | | Mfr Part Number | BT-31A | | Model Number | BT-31 | | Mounting Type | Wall Mount | | Packer Contact Information | Blackt Electrotech | | Power Source | Corded Electric | | Unit Count | 1.00 Count | ## Product Details - **Brand:** Blackt Electrotech - **Colour:** White - **Item Weight:** 200 Grams - **Maximum Range:** 12 metres - **Power Source:** Corded Electric ## Images ![Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted - Image 1](https://m.media-amazon.com/images/I/61oZzwTwcdL.jpg) ![Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted - Image 2](https://m.media-amazon.com/images/I/81qa3xuti5L.jpg) ![Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted - Image 3](https://m.media-amazon.com/images/I/71bCtLYnBFL.jpg) ![Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted - Image 4](https://m.media-amazon.com/images/I/61I3mpVA0vL.jpg) ![Blackt Electrotech : BT31W PIR Sensor Motion Sensor Energy Saving Motion Detector Wall Mounted - Image 5](https://m.media-amazon.com/images/I/61uqsyKn1iL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: Can i connect it to a tv? and turn it on during day too?** A: There’s no point connecting this to a TV as it doesn’t have an exact switch-off time so you may have a situation when it switches off while you are still watching the TV (and you will have to move a bit for it to re start and that can take time coming back to the same channel) and on the other hand it can be running when you even leave the room, depending on how much time you have set it up for. Turning it on during the day is also a challenge but you could cover it with a dark cloth to switch it on but then that’s not an automatic switching on. **Q: how is the connections done.to the cfl bulb?** A: Dear Kabir, The electrical connection of the Motion Sensor will be in series after switch , and it cn be use for any type of light , It works satisfactory and product is OKEY. **Q: Can it sense motion of stray cats that enter balcony and dirty the area?** A: since the body area of cats is much small it may not sence thermal radiation may not be suffeient **Q: Can it be exposed to direct sunlight during daytime?** A: Sunlight adjustment in sensor ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by B***U on 30 October 2025* ### ⭐⭐⭐⭐ Review *by R***C on 1 September 2018* ### ⭐⭐⭐⭐⭐ Review *by T***. on 7 April 2026* ## Frequently Bought Together - Blackt Electrotech PIR Sensor Light and Energy Saving Motion Detector Wall Mounted Switch (White) - Blackt Electrotech(BT31MT): Microwave/Radar Sensor Light Switch Occupancy Body Motion Detector (Microwave Thin Round Type) - Blackt Electrotech BT31P2 White Water Proof 230Volt Auto Day/Night on and Off Photocell, Ldr Sensor Switch for Lighting (5 Pic Pack) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/64722851-blackt-electrotech-bt31w-pir-sensor-motion-sensor-energy-saving-motion](https://www.desertcart.pt/products/64722851-blackt-electrotech-bt31w-pir-sensor-motion-sensor-energy-saving-motion) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-12*