---
product_id: 223856609
title: "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: "฿1305"
currency: THB
in_stock: true
reviews_count: 8
category: "Blackt Electrotech"
url: https://www.desertcart.co.th/products/223856609-bt35-diy-smoke-detection-sensor-system-with-alarm-85-db
store_origin: TH
region: Thailand
---

# LED status indicator 85 dB loud alarm DIY easy install 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:** ฿1305
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 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?** ฿1305 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/223856609-bt35-diy-smoke-detection-sensor-system-with-alarm-85-db)

## 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, perfect for apartments, hotels, and cozy family homes.
- • **Hassle-Free Setup:** DIY ceiling or wall mount with no maintenance headaches—just insert a 9V battery.
- • **Instant Fire Alert:** 85 dB alarm cuts through noise to keep you safe and sound.
- • **Always-On Vigilance:** LED flashes every minute to confirm your home’s silent guardian is active.
- • **Built for Real Life:** Operates reliably from -10°C to 50°C and up to 95% humidity—ready for any environment.

## Overview

The Blackt Electrotech BT35 is a compact, ionization smoke detector designed for easy DIY installation in homes, hotels, and apartments. It features an 85 dB alarm, a clear LED indicator for continuous monitoring, and operates reliably across a wide temperature and humidity range. Maintenance-free with a low battery warning, it covers up to 25 square meters, ensuring dependable fire safety with minimal effort.

## 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: Convenience - Thank you desertcart for availability of such a unique and wide range of products. Really helpful to me.
Review: Recd it yesterday. Tested with smoke from burning paper, it worked. Durability will update later - Pro : Recd it 1 day back. Tested it with smoke from burning paper, it did not start up. When burning paper was extinguished and heavier smoke came out, it beeped. Beep is loud and sharp, so should alert me, wake me up. Took out the battery before installing it. With no battery, the unit managed to give low-battery chirping sound for 3-4 times, which is good. ______ Cons : Fitting the alarm on to the base plate is difficult, as there are only two clamping spots you waste lot of time standing on the ladder trying to get it fixed. Durability : Dont know yet, will update Battery usage speed : Do not know, will update it after 6 month and 1 year again

## 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 | #2,975 in Home Improvement ( See Top 100 in Home Improvement ) #5 in Fire Safety |
| Brand | Blackt Electrotech |
| Colour | White |
| Compatible Devices | Smoke sensor |
| Country of Origin | India |
| Included Components | Holding plate for mounting |
| Item Weight | 220 g |
| Item model number | B08BCFCM93 |
| Manufacturer | Blackt Electrotech |
| Material | Plastic |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Operating Humidity | 95 percent |
| Power Source | Battery Powered |
| Product Dimensions | 14D x 6W x 14H Centimeters |
| Sensor Type | Ionization |
| Style | Auto |
| Upper Temperature Rating | 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

![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/61rxaY1jCeL.jpg)

## Questions & Answers

**Q: 9 volt battery is 9 volt aaa or 9 volt aa ?**
A: Alkaline General Purpose 9 Volt Batteries

**Q: Does it detect carbon monoxide?**
A: No, it does not make any such claim. The description says, "When the chamber is filled with a certain density of smoke, it immediately raises an Alert". Smoke can be detected by a light sensitive device, because, it would obstruct the light falling on the sensor, but Carbon Monoxide is colourless and so, can not be detected by a light sensitive device.

**Q: What will be battery life?**
A: Device is not functioning correctly it started making noise anytime without any smoke, battery life is fine will work 1-1.5 yrs.

**Q: Is it Ionization smoke detector**
A: Not this one. that is another one Make Apollo

## Customer Reviews

### ⭐⭐⭐⭐⭐ Convenience
*by P***P on 18 October 2025*

Thank you amazon for availability of such a unique and wide range of products. Really helpful to me.

### ⭐⭐⭐⭐ Recd it yesterday. Tested with smoke from burning paper, it worked. Durability will update later
*by I***A on 16 July 2021*

Pro : Recd it 1 day back. Tested it with smoke from burning paper, it did not start up. When burning paper was extinguished and heavier smoke came out, it beeped. Beep is loud and sharp, so should alert me, wake me up. Took out the battery before installing it. With no battery, the unit managed to give low-battery chirping sound for 3-4 times, which is good. ______ Cons : Fitting the alarm on to the base plate is difficult, as there are only two clamping spots you waste lot of time standing on the ladder trying to get it fixed. Durability : Dont know yet, will update Battery usage speed : Do not know, will update it after 6 month and 1 year again

### ⭐⭐⭐ Good quality
*by H***M on 21 October 2025*

Beep is not so loud that you can hear when door is closed

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-06*