--- product_id: 701783888 title: "Carbon Monoxide Alarm BRK CO250 Battery Operated Carbon Monoxide Detector With 9 Volt Battery & Two Silence Features, White, CO250B, 1-Pack" brand: "first alert" price: "$50.63" currency: USD in_stock: true reviews_count: 1 url: https://www.desertcart.us/products/701783888-carbon-monoxide-alarm-brk-co250-battery-operated-carbon-monoxide-detector store_origin: US region: United States of America --- # Electrochemical sensor for ultra-accurate CO detection Tamper-resistant locking pin for secure installation Dual silence modes to mute alarms & low-battery chirps Carbon Monoxide Alarm BRK CO250 Battery Operated Carbon Monoxide Detector With 9 Volt Battery & Two Silence Features, White, CO250B, 1-Pack **Brand:** first alert **Price:** $50.63 **Availability:** ✅ In Stock ## Summary > 🚨 Stay one step ahead—because your safety deserves the smartest alert! ## Quick Answers - **What is this?** Carbon Monoxide Alarm BRK CO250 Battery Operated Carbon Monoxide Detector With 9 Volt Battery & Two Silence Features, White, CO250B, 1-Pack by first alert - **How much does it cost?** $50.63 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/701783888-carbon-monoxide-alarm-brk-co250-battery-operated-carbon-monoxide-detector) ## 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 ## Key Features - • **Silent Control:** Two silence features let you mute alarms and low-battery alerts for up to 8 hours—peace of mind on your terms - • **Hassle-Free Setup:** Includes 9V battery and all mounting hardware for quick, tool-free installation - • **Long-Term Reliability:** End-of-life chirp signals when it’s time to replace, so you’re never caught off guard - • **Precision Safety Tech:** Electrochemical sensor delivers industry-leading CO detection accuracy - • **Secure & Tamper-Proof:** Locking pin prevents battery removal, ensuring continuous protection ## Overview The FIRST ALERT BRK CO250 is a battery-operated carbon monoxide detector featuring the most accurate electrochemical sensor technology. It includes a 9V battery, tamper-resistant locking pin, and dual silence functions to mute alarms and low-battery chirps for up to 8 hours. Designed for easy installation and long-term reliability with an end-of-life signal, it ensures your home stays protected with minimal hassle. ## Description FIRST ALERTCarbon Monoxide Alarm BRK CO250 Battery Operated Carbon Monoxide Detector With 9 Volt Battery & Two Silence Features, White, CO250B, 1-Pack ## Features - HIGHEST QUALITY, most accurate electrochemical co sensor technology - CONVENIENT, end of life chirping signal - HELPFUL, 2 silence features that silence both alarm and low-battery chirp - FEATURES, 9-Volt Battery and all necessary mounting hardware - Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0039QEV4S | | Alarm | Visual | | Best Sellers Rank | #14,008 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #45 in Carbon Monoxide Detectors | | Brand | First Alert | | Built-In Media | Electrical & Heating;Rough Electrical;electrical-timers | | Color | White | | Customer Reviews | 4.7 4.7 out of 5 stars (2,048) | | Enclosure Material | Carbon | | Global Trade Identification Number | 00029054003928 | | Item Dimensions D x W x H | 1.6"D x 4.25"W x 4.25"H | | Item Type Name | Single Gas Detector, Co, Audible, Visual, 9 V | | Item Weight | 6.24 ounces | | Manufacturer | First Alert | | Manufacturer Warranty Description | 7 Year Limited Warranty | | Model Number | CO250B | | Power Source | Battery Powered | | Product Style | 1 Pack | | Sensor Type | Electrochemical | | UPC | 029054003928 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** FIRST ALERT - **Style:** 1 Pack - **Power source:** Battery Powered - **Colour:** White - **Product dimensions:** 4.1D x 10.8W x 10.8H centimeters ## Images ![Carbon Monoxide Alarm BRK CO250 Battery Operated Carbon Monoxide Detector With 9 Volt Battery & Two Silence Features, White, CO250B, 1-Pack - Image 1](https://m.media-amazon.com/images/I/71N13vRi+2L.jpg) ## Available Options This product comes in different **Pattern Name, Size** 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 ### ⭐⭐⭐⭐⭐ 👍 *by إ***ي on 6 July 2023* 👍 ## 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.us/products/701783888-carbon-monoxide-alarm-brk-co250-battery-operated-carbon-monoxide-detector](https://www.desertcart.us/products/701783888-carbon-monoxide-alarm-brk-co250-battery-operated-carbon-monoxide-detector) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-16*