--- product_id: 108849190 title: "Blackt Electrotech(BT-35F1): Updated Smoke Detection Sensor with Alert Alarm (DIY) System" brand: "blackt electrotech" price: "67.73 DT" currency: TND in_stock: true reviews_count: 8 url: https://www.desertcart.tn/products/108849190-blackt-electrotech-bt-35f1-updated-smoke-detection-sensor-with-alert store_origin: TN region: Tunisia --- # 85 dB Alarm 1+ Year Battery Life Operates up to 50°C Blackt Electrotech(BT-35F1): Updated Smoke Detection Sensor with Alert Alarm (DIY) System **Brand:** blackt electrotech **Price:** 67.73 DT **Availability:** ✅ In Stock ## Summary > 🚨 Safety Meets Simplicity: Your Home's Silent Guardian! ## Quick Answers - **What is this?** Blackt Electrotech(BT-35F1): Updated Smoke Detection Sensor with Alert Alarm (DIY) System by blackt electrotech - **How much does it cost?** 67.73 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/108849190-blackt-electrotech-bt-35f1-updated-smoke-detection-sensor-with-alert) ## 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 - • **⚡ Hassle-Free Setup:** No assembly or wiring required—just install and go! - • **🔔 Dual Alert System:** Audio and visual fault signals keep you informed. - • **🔋 Long-Lasting Power:** Enjoy peace of mind with a battery life exceeding one year. - • **💧 Anti-Humidity Design:** Engineered to perform even in high humidity environments. - • **🔍 Continuous Monitoring:** Stay alert with real-time smoke detection. ## Overview The Blackt Electrotech BT-35F1 is an advanced optical wireless smoke detection sensor that combines a powerful 85 dB alarm with a user-friendly design. With features like continuous monitoring, a dual alert system, and a battery life of over a year, this smoke detector ensures your safety without the hassle of complex installation. Its anti-humidity technology makes it reliable in various environments, making it an essential addition to any home. ## Description New Blackt Electrotech: Fire/Smoke Detection Sensor with Alert Alarm It can install and maintain easy for residential smoke alarms, It is cost effective expensive ways to provide warning early stage when a fire starts begin. It protect worming by loud alarm up to 85 dB prevent injuries and minimize property damage from Fire. When the chamber is filled with a certain density of smoke, it immediately raises an Alert, which helps to take necessary action regarding the Fire Break. Uses of Smoke Sensor are suitable for Offices, House, Hospitals, Hotels, etc. Features: Easy to use & Installation.Loud Alarm upto 85dB alarm signal. Flashing LED indication. Color: White Test button for easy recommended monthly testing.It can install Ceiling or wall Low battery warning QUALITY CONTROL STANDARDS: Operating Volt: 9 Volt (not included) Battery or DC 12V (Network type) Static Current: less than 10 uA Alarm Current: less than 20-25 uA Sound Level: upto 85dB alarm signal. Operating Temp: -10 ~ +50 Deg C Opering Ilumidity:less than 95% RII Detecting Area: 25 Sq Mtr Installation 1) Choose a suitable area & drill to holes ceiling or wall as the bracket site. 2)Put bracket screws & stick the bracket, Plug 3)Put 9 Volt DC battery inside unit & fix unit to the plate. 4)Press Test button unit working normal or not5)After installed unit it will working state the LED will flash one time a minute, when some burning modes are detected, It will give out ringing & loud Whistle until the are density in balance. PACKAGE INCLUDES 1 x Smoke Alarm Module 1 x Ceiling mounting plat2 x Mounting Screw 1 x User manualBill Thanks for visiting here! ## Features - Optical Wireless smoke detector/Sensor/Alarm Unit with 85 dB Alarm Signal - Faster/Safer Delivery : Continuous Monitoring system - Fault Signal warning (by Audio & visual) / No need any assembly or wiring - Discharged battery indicator/ Test Button/ 9 Volt Battery can use. (Battery Life more than year*) - Low Power consumption CMOS processing/ Special Anti- Humidity More Customer Care : Whapp/Mb: 9657707702 ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Blackt Electrotech | | Style | Bracket | | Power Source | बटरी सचालित | | Item Weight | 140 Grams | | Alarm | Audible | | Operating Humidity | 95 percent | | Upper Temperature Rating | 50 Degrees Celsius | | Manufacturer | Blackt Electrotech | | Country of Origin | China | | Item part number | BT-21192 | | Product Dimensions | 4 x 11.5 x 11.5 cm; 140 Grams | | ASIN | B07MV46XCB | ## Images ![Blackt Electrotech(BT-35F1): Updated Smoke Detection Sensor with Alert Alarm (DIY) System - Image 1](https://m.media-amazon.com/images/I/61BmsulSRiL.jpg) ![Blackt Electrotech(BT-35F1): Updated Smoke Detection Sensor with Alert Alarm (DIY) System - Image 2](https://m.media-amazon.com/images/I/71x-JOInLkL.jpg) ![Blackt Electrotech(BT-35F1): Updated Smoke Detection Sensor with Alert Alarm (DIY) System - Image 3](https://m.media-amazon.com/images/I/71OPh7RCzQL.jpg) ![Blackt Electrotech(BT-35F1): Updated Smoke Detection Sensor with Alert Alarm (DIY) System - Image 4](https://m.media-amazon.com/images/I/81i7ClFdw+L.jpg) ## Customer Reviews ### ⭐ 1.0 out of 5 stars Waste of money, better to buy from authentic shop *by A***H on Reviewed in India on 3 December 2020* Faulty product. I bought 2 pcs and fixed it at wall. After 3 months I thought to test it. Didn’t alarm even after putting over the dark black smoke from firecrackers. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Smoke detector *by C***W on Reviewed in India on 16 October 2019* Good simple smoke detector. Fixed in kitchen. Can be tested readily. Battery 9v not included. Great price. Must for every home and kitchen ### ⭐⭐⭐⭐ 4.0 out of 5 stars Average build *by V***O on Reviewed in India on 11 July 2021* Malfunctioning after 2 years --- ## 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.tn/products/108849190-blackt-electrotech-bt-35f1-updated-smoke-detection-sensor-with-alert](https://www.desertcart.tn/products/108849190-blackt-electrotech-bt-35f1-updated-smoke-detection-sensor-with-alert) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-07*