---
product_id: 223856609
title: "Blackt Electrotech BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White)"
brand: "blackt electrotech"
price: "193 kr"
currency: NOK
in_stock: true
reviews_count: 8
category: "Blackt Electrotech"
url: https://www.desertcart.no/products/223856609-blackt-electrotech-bt35-diy-smoke-detection-sensor-system-with-alarm
store_origin: NO
region: Norway
---

# LED status indicator 85 dB loud alarm Easy DIY install Blackt Electrotech BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White)

**Brand:** blackt electrotech
**Price:** 193 kr
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay ahead of danger with silent vigilance and loud protection!

## Quick Answers

- **What is this?** Blackt Electrotech BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White) by blackt electrotech
- **How much does it cost?** 193 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/223856609-blackt-electrotech-bt35-diy-smoke-detection-sensor-system-with-alarm)

## 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

- • **Compact Coverage:** Protects up to 25 sq. meters with sleek, minimal design
- • **Plug & Play Setup:** No wiring needed—mount on ceiling or wall in minutes
- • **Instant Fire Alert:** 85 dB alarm cuts through noise to protect your space
- • **Smart Visual Feedback:** LED flashes in standby & rapid mode for real-time smoke detection
- • **Built for Harsh Conditions:** Operates reliably from -10°C to 50°C & up to 95% humidity

## Overview

The BT35 DIY Smoke Detection Sensor System delivers reliable fire safety with an 85 dB alarm and continuous LED monitoring. Designed for easy ceiling or wall installation without wiring, it operates on a 9V battery and functions effectively in diverse environments (-10°C to 50°C, up to 95% humidity). Ideal for homes, hotels, and apartments, it covers 25 sq. meters and includes user-friendly features like a test button and low battery warning to ensure constant protection.

## Description

Blackt Electrotech BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White) : desertcart.in: Home & Kitchen

Review: Highly reliable - Very efficient and sensitive to smoke
Review: some time false siren - some time false siren

## Features

- 🔥 [Reliable Smoke Detection]: Designed to detect smoke effectively and alert you with an 85 dB loud alarm, protecting your property ones from fire damage.
- 💡 [Continuous Monitoring System]: Equipped with an LED indicator that flashes once per minute in standby mode and rapidly during smoke detection, ensuring constant vigilance.
- 🛠️ [Easy Installation & Maintenance-Free]: Ceiling or wall-mountable, operating on a 9V battery (not included) with a low battery warning for user convenience.
- 🌡️ [High Sensitivity & Stability]: Functions reliably under harsh conditions, operating within -10°C to +50°C and humidity levels below 95% RH, while detecting smoke with medium density.
- 🏠 [Versatile Applications]: Ideal for use in homes, apartments, hotels, and public spaces, offering dependable indoor fire alarm protection.
- 📏 [Compact Design]: Covers a 25 sq. meter area with a simple structure for hassle-free setup and operation.
- 🛡️ [User-Friendly Features]: Includes a test button for monthly functionality checks and LED indicator for visual feedback low battery indicator also.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08BCFCM93 |
| Alarm | Smoke |
| Best Sellers Rank | #4,131 in Home Improvement ( See Top 100 in Home Improvement ) #9 in Fire Safety |
| Brand | Blackt Electrotech |
| Built-In Media | Holding plate for mounting |
| Colour | White |
| Compatible Devices | Smoke sensor |
| Country of Origin | India |
| Customer Reviews | 3.6 out of 5 stars 337 Reviews |
| Enclosure Material | Plastic |
| Item Dimensions D x W x H | 14D x 6W x 14H Centimeters |
| Item Weight | 220 Grams |
| Manufacturer | Blackt Electrotech |
| Model Number | B08BCFCM93 |
| Number of Items | 1 |
| Operating Humidity | 95 percent |
| Power Source | Battery Powered |
| Product Dimensions | 14D x 6W x 14H Centimeters |
| Product Style | Auto |
| Sensor Type | Photoelectric |
| Style | Auto |
| Unit Count | 1.0 Count |
| Upper Temperature Range | 50 Degrees Celsius |

## Product Details

- **Alarm:** Smoke
- **Brand:** Blackt Electrotech
- **Colour:** White
- **Compatible Devices:** Smoke sensor
- **Item Weight:** 220 Grams
- **Operating Humidity:** 95 percent
- **Power Source:** Battery Powered
- **Product Dimensions:** 14D x 6W x 14H Centimeters
- **Style:** Auto
- **Upper Temperature Rating:** 50 Degrees Celsius

## Images

![Blackt Electrotech BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White) - Image 1](https://m.media-amazon.com/images/I/51wiBqtRTVL.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

### ⭐⭐⭐⭐⭐ Highly reliable
*by R***L on 8 April 2026*

Very efficient and sensitive to smoke

### ⭐⭐⭐⭐ some time false siren
*by A***R on 8 September 2021*

some time false siren

### ⭐ WORTHLESS AND DISAPPOINTING
*by P***R on 24 April 2026*

Disappointing. worthless. First of all, it doesn't come with a battery, and you have to buy one. After inserting a new battery, I switched it on, and even after placing it directly over the fire and smoke, there was no ALARM. No sound. I then asked it to be returned, and I got a message that my defective item has been picked up. I checked, and it was not picked up. Then, later, I got a message that a new item had been delivered. Again, no item was delivered. So I brought this matter to customer care, and they were very efficient and refunded the money. Please avoid buying.

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-10-14*