---
product_id: 246712627
title: "BRK CO250B Carbon Monoxide Alarm"
brand: "first alert"
price: "HK$773"
currency: HKD
in_stock: true
reviews_count: 5
url: https://www.desertcart.hk/products/246712627-brk-co250b-carbon-monoxide-alarm
store_origin: HK
region: Hong Kong
---

# BRK CO250B Carbon Monoxide Alarm

**Brand:** first alert
**Price:** HK$773
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** BRK CO250B Carbon Monoxide Alarm by first alert
- **How much does it cost?** HK$773 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/246712627-brk-co250b-carbon-monoxide-alarm)

## Best For

- first alert enthusiasts

## Why This Product

- Trusted first alert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

BRK CO250B Carbon Monoxide Alarm

## Features

- Electrochemical CO Sensor is the most accurate technology available
- Two Silence Features Silence Low Battery Chirp For up to 8 Hours
- End of Life Signal
- Tamper Resistant Locking Pin Locks Alarm Cover to Prevent Removal of Battery
- 9V Battery Included
- Package Contents: 1 Piece Carbon Monoxide Alarm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0039QEV4S |
| Alarm | Visual |
| Batteries | 1 9V batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #31,301 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #76 in Carbon Monoxide Detectors |
| Brand | First Alert |
| Color | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,035) |
| Date First Available | February 24, 2010 |
| Finish | No Finish |
| Global Trade Identification Number | 00029054003928 |
| Included Components | Electrical & Heating;Rough Electrical;electrical-timers |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 6.2 ounces |
| Item model number | CO250B |
| Manufacturer | First Alert |
| Material | Carbon |
| Mounting Type | Plate Mount |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | CO250B |
| Pattern | Detector |
| Power Source | Battery Powered |
| Product Dimensions | 1.6"D x 4.25"W x 4.25"H |
| Sensor Type | Electrochemical |
| Size | 1-Pack |
| Sound Level | 85 Decibels |
| Style | 1 Pack |
| UPC | 029054003928 |
| Voltage | 120 Volts |
| Warranty Description | 7 Year Limited Warranty |

## Product Details

- **Alarm:** Visual
- **Brand:** First Alert
- **Color:** White
- **Global Trade Identification Number:** 00029054003928
- **Item Weight:** 6.24 ounces
- **Material:** Carbon
- **Power Source:** Battery Powered
- **Product Dimensions:** 1.6"D x 4.25"W x 4.25"H
- **Sensor Type:** Electrochemical
- **Style:** 1 Pack

## Images

![BRK CO250B Carbon Monoxide Alarm - Image 1](https://m.media-amazon.com/images/I/71N13vRi+2L.jpg)

## Available Options

This product comes in different **Size name** options.

## Questions & Answers

**Q: Will this detect propane gas? Lookin to install in my travel trailer**
A: no, you will need a separate detector for that. LP gas is detected near the floor of a RV. Carbon Monoxide rises and is detected near the ceiling. My Travel Trailer had a carbon monoxide detector near the bed room on the wall near the ceiling, a LP detector in the kitchen near the floor and a smoke detector on the ceiling between the kitchen and living area.

**Q: This detector cannot be used if temperatures are below 40f or above 100f.  what detectors are available that can be used below 40f and above 100f?**
A: Thank you for your question. Our alarms are manufactured to be used in the home, in living areas. Most homes would be inconsistent with temperatures below 40 or higher than 100 degrees. If you're using this in a camper/trailer etc- you should keep it in your home when the camper/trailer is in storage not being used. Consistent extreme temps can affect the sensors, components & battery life.

**Q: is this detector certified for use in rv's ?**
A: I see RV's use unconditioned CO detectors that aren't temperature controlled. I wouldn't use it in an RV.

**Q: Can I use it as a portable co detector? Going on a trip from one hotel to another and never mounting it**
A: It is battery operated so I don't see why you can't take it with you

## Customer Reviews

### ⭐ 







  
  
    NOT FIRST ALERT
  

*by C***D on Reviewed in the United States 🇺🇸 on 25 September 2018*

THIS IS NOT MADE BY FIRST ALERT!  False description. Do not buy.

### ⭐⭐⭐ 







  
  
    Not Loud Enough
  

*by B***R on Reviewed in the United States 🇺🇸 on 19 March 2018*

This detector fits the mounting screw pattern of the unit I am replacing and that helps avoid drilling yet another set of holes in the wall.Unfortunately, this unit, like most now for sale, is only 85 dB and there is a good chance that it will not wake you up if you are sleeping in another room. It protects your hearing, but is not as loud as units from past years. I do not know what they are thinking. Traveling on subways to and from work probably exposes you to more hearing damage than an occasional false alarm. If a real alarm occurs, you want something loud to get your attention. If anyone knows of a unit louder than 85 dB, please post.

### ⭐ 







  
  
    Disappointed!
  

*by D***G on Reviewed in the United States 🇺🇸 on 15 November 2019*

I thought I was purchasing the same alarm previously purchased - a plug-in First Alert detector.  I must have overlooked the description because it is clearly battery operated and requires "installation".  Also, the brand does not appear to be First Alert.  I have never made so many mistakes on a single purchase and suspect the description and/or other information were misleading.

## Frequently Bought Together

- FIRST ALERT Carbon Monoxide Alarm | BRK CO250 Battery Operated Carbon Monoxide Detector With 9-Volt Battery & Two Silence Features
- FIRST ALERT BRK FG250B Dual Ionization Smoke Alarm with 9-Volt Battery, 1", White
- RV Propane Gas Detector, VITITE Digital RV LP Gas Alarm, Hardwired - VDC 12V, Flush & Surface Mount, with 3 Brackets

---

## 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.hk/products/246712627-brk-co250b-carbon-monoxide-alarm](https://www.desertcart.hk/products/246712627-brk-co250b-carbon-monoxide-alarm)

---

*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-22*