--- product_id: 334346441 title: "Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack" brand: "blackt electrotech" price: "₹ 1951" currency: INR in_stock: true reviews_count: 8 url: https://www.desertcart.in/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2 store_origin: IN region: India --- # LED status indicator 25m² coverage area 85dB loud alarm Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack **Brand:** blackt electrotech **Price:** ₹ 1951 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of danger with Blackt Electrotech’s sharp smoke detection! 🚨 ## Quick Answers - **What is this?** Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack by blackt electrotech - **How much does it cost?** ₹ 1951 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2) ## 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 - • **Instant Fire Alert:** 85dB siren cuts through noise for immediate safety awareness - • **Smart LED Vigilance:** Clear LED flashes to confirm continuous monitoring and quick smoke detection - • **Compact Yet Powerful:** Covers up to 25 square meters with sleek, space-saving design - • **All-Weather Reliability:** Operates flawlessly from -10°C to 50°C and up to 95% humidity - • **Effortless DIY Installation:** Battery-powered, no wiring needed—mount on ceiling or wall in minutes ## Overview The Blackt Electrotech BT35F Smoke Detection Sensor Alarm 2-pack delivers reliable, high-sensitivity smoke detection with an 85dB alarm and clear LED indicators. Designed for easy DIY installation without wiring, it covers up to 25 square meters and operates effectively in diverse indoor environments, ensuring continuous fire safety monitoring for homes, apartments, and public spaces. ## Description BlackT Electrotech – Smart Sensors for Safety, Energy Saving & Complete Home Automation. BlackT Automate Lights, Save Energy & Protect Appliances Reliable Fire Safety Protection 1. What type of fire does this smoke detector identify? It detects smoke generated by developing fires and triggers an 85dB alarm to provide early warning for safer evacuation. 2. How loud is the alarm? The built-in siren produces an 85dB alarm, making it loud enough to alert occupants in nearby rooms during emergencies. 3. What area can one detector cover? One unit provides effective smoke detection coverage for areas up to approximately 25 square meters under normal conditions. 4. Does it require wiring for installation? No, it operates on a 9V battery (not included) and can be mounted easily on a ceiling or wall without wiring. 5. How do I know the detector is working? The LED flashes once every minute in standby mode and flashes rapidly with the alarm when smoke is detected. BT35 Smoke Alarm BT35W WiFi Smoke Fire Sensor 85dB BT35F 2 Pack ## Features - [Reliable Smoke Detection]: Engineered to detect smoke effectively and alert you with an 85 dB loud alarm, protecting your property and loved ones from potential fire damage. - [Continuous Monitoring System]: Equipped with a clear LED indicator that flashes once per minute during standby mode and rapidly upon smoke detection to ensure constant vigilance. - [Simple Setup and Upkeep]: Designed for easy ceiling or wall mounting, operating with low-maintenance convenience and featuring a warning notification when power needs replacement. - [High Sensitivity and Stability]: Functions reliably under challenging conditions, operating within -10°C to +50°C and humidity levels below 95% RH while accurately sensing medium-density smoke. - [Versatile Indoor Applications]: Ideal for deployment across residential homes, apartments, hotels, and public spaces to provide dependable indoor fire safety protection. - [Compact Coverage Design]: Covers an area of up to 25 square meters with a streamlined structure for a hassle-free installation and setup process. ## Technical Specifications | Specification | Value | |---------------|-------| | Alarm | Yes | | Asin | B0946XVYM2 | | Best Sellers Rank | #13,721 in Home Improvement (See Top 100 in Home Improvement) #25 in Fire Safety | | Brand | Blackt Electrotech | | Colour | White | | Country Of Origin | China | | Customer Reviews | 3.8 3.8 out of 5 stars (144) 3.8 out of 5 stars | | Item Weight | 240 Grams | | Manufacturer | Blackt Electrotech | | Number Of Items | 2 | | Operating Humidity | 95 percent | | Power Source | Battery Powered | | Product Style | Alarm | | Sensor Type | optical | | Unit Count | 2.0 Count | | Upper Temperature Range | 50 Degrees Celsius | ## Product Details - **Brand:** Blackt Electrotech - **Style:** Alarm - **Power Source:** Battery Powered - **Colour:** White - **Item Weight:** 240 Grams - **Alarm:** Yes - **Operating Humidity:** 95 percent - **Upper Temperature Rating:** 50 Degrees Celsius - **Sensor Type:** optical - **Number of Items:** 2 ## Images ![Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Image 1](https://m.media-amazon.com/images/I/71CYglJD-SL.jpg) ## Questions & Answers **Q: 1. What type of fire does this smoke detector identify?** A: It detects smoke generated by developing fires and triggers an 85dB alarm to provide early warning for safer evacuation. **Q: 2. How loud is the alarm?** A: The built-in siren produces an 85dB alarm, making it loud enough to alert occupants in nearby rooms during emergencies. **Q: 3. What area can one detector cover?** A: One unit provides effective smoke detection coverage for areas up to approximately 25 square meters under normal conditions. **Q: 4. Does it require wiring for installation?** A: No, it operates on a 9V battery (not included) and can be mounted easily on a ceiling or wall without wiring. **Q: 5. How do I know the detector is working?** A: The LED flashes once every minute in standby mode and flashes rapidly with the alarm when smoke is detected. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Value for money *by on Reviewed in India 6 August 2026* I found this product very good and useful. I have even tested it by burning paper and it gave alarm very soon. I will recommend it ### ⭐⭐⭐⭐ Does its purpose *by on Reviewed in India 5 July 2026* Does its purpose tested with smoke also working but battery should be included ### ⭐⭐⭐ Works after burned down *by on Reviewed in India 24 May 2026* Average Product bcz its working Very slow alarm After everything burned down ## Frequently Bought Together - Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Blackt Electrotech BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White) - Fire Stop Car and Home Fire Extinguisher (Pack of 2) --- ## 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.in/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2](https://www.desertcart.in/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-09-06*