--- product_id: 470810555 title: "FA3820 Carbon Monoxide Detector" brand: "fireangel" price: "€ 56.36" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.fi/products/470810555-fa3820-carbon-monoxide-detector store_origin: FI region: Finland --- # Compact 125x67x33 mm portable size 85 dB loud alarm at 3 meters 10-year sealed battery life FA3820 Carbon Monoxide Detector **Brand:** fireangel **Price:** € 56.36 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of danger with decade-long CO protection! 🚨 ## Quick Answers - **What is this?** FA3820 Carbon Monoxide Detector by fireangel - **How much does it cost?** € 56.36 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/470810555-fa3820-carbon-monoxide-detector) ## Best For - fireangel enthusiasts ## Why This Product - Trusted fireangel brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Certified & Trusted:** UKCA marked, BSI Kitemark certified for guaranteed reliability and safety. - • **Travel-Ready Safety:** Compact, lightweight design fits perfectly in homes, caravans, campervans, and cars. - • **Visual & Audible Alerts:** Loud 85 dB alarm plus flashing red LED ensure you never miss a warning. - • **Decade-Long Peace of Mind:** Sealed, tamper-proof 10-year battery means no replacements, no hassle. - • **Ultra-Sensitive CO Detection:** Advanced electrochemical sensor triggers early alerts before danger peaks. ## Overview The FireAngel FA3820 Portable Carbon Monoxide Detector features a cutting-edge electrochemical sensor that detects dangerous CO levels early, triggering a loud 85 dB alarm and flashing LED alerts. Its sealed 10-year battery ensures maintenance-free operation throughout its lifespan. Compact and travel-friendly, it’s perfect for homes, caravans, and vehicles. Certified by UKCA and BSI, it guarantees trusted, reliable protection against the silent threat of carbon monoxide. ## Description At FireAngel, we're dedicated to protecting and improving our customers’ lives by making innovative, cutting-edge fire safety technology that’s simple and accessible. The FA3820’s electrochemical sensing technology enables a fast reaction to rising levels of carbon monoxide (CO), aka ‘The Silent Killer’, helping to keep you and your family safe. The FA3820 offers the highest level of CO detection for your home and replaces end-of-life CO-9X alarms. FireAngel: Smarter solutions for safer homes. In the event of the CO alarm sounding, follow these 3 steps: What are the symptoms of CO poisoning? Symptoms of CO poisoning include headache, dizziness, weakness, nausea and vomiting, rapid heartbeat, shortness of breath, seizures, chest pain, disorientation, and loss of consciousness. Who should I call in the event of a CO leak? If in the UK, call The National Gas Emergency Service on 0800 111 999. If outside the UK, call your supplier's emergency number. What are the sources of CO? The common sources of Carbon Monoxide (CO) are cookers, fires, boilers, oil and gas boilers, portable generators, oil or solid fuel cookers, gas or paraffin heaters, barbecues (BBQs), clogged chimneys, wood or gas fireplaces, cigarette smoke or any fossil fuel‑burning appliances. About Us We pride ourselves on product reliability and quality. Since 1998, we’ve deployed over 80 million safety products, protecting over 25 million homes nationwide. Sustainability We’re committed to reducing our impact on the planet; that’s why we've reduced the plastic in our packaging and have unique products that use less energy. The FireAngel range In addition to our carbon monoxide detectors for the home, we offer a wide range of other safety products designed to protect you and your family. Choose from smart and wireless devices, as well as standard fire, smoke, and heat alarms. ## Features - CARBON MONOXIDE ALARMS FOR HOME USE: The advanced electrochemical sensor detects dangerous levels of carbon monoxide (CO) in your home, alerting you with 4 loud chirps (85 dB(A) at 3 metres) and a flashing red ‘CO’ LED light. - ENHANCED SENSING: The alarm’s high sensitivity mode will activate if it predicts that CO levels will rise to or above 180 ppm, providing a quicker alert and a ‘pre alarm’ with a visual instruction to ‘ventilate'. - 10-YEAR SEALED FOR LIFE BATTERY: Each CO monitor is fitted with a sealed, tamper proof, 10 year battery that will last the lifetime of the alarm. A flashing amber '!' and an audible beep will alert you when the device needs replacing. - ALARM MEMORY: Your device will notify you of a CO alarm in your absence. If not silenced, the alarm will continue to sound until CO levels are safe. The red ‘CO’ light will continue flashing as a visual indication of a previous activation. - PORTABLE CARBON MONOXIDE DETECTOR: Measuring 125 x 67 x 33 mm, this compact, free standing device is travel friendly and provides protection wherever you go. It also includes an integrated mounting bracket and screws for easy wall mounting. - SAFETY ASSURED: Suitable for all domestic and rental premises, the FA3820 carbon monoxide monitor is UKCA marked, Kitemark certified, and third-party approved by the British Standards Institute (BSI) to BS EN 50291-1:2018 and EN 50291-2:2019. - FIREANGEL HOME PROTECTION: In addition to our carbon monoxide detectors, we offer a wide range of other safety products designed to protect you and your family. Choose from smart and wireless devices, as well as standard fire, smoke, and heat alarms. ## Technical Specifications | Specification | Value | |---------------|-------| | Alarm | Audible | | Asin | B0B9HC17ZG | | Best Sellers Rank | 289 in DIY & Tools (See Top 100 in DIY & Tools) 4 in Carbon Monoxide Detectors | | Brand | Fireangel | | Colour | White | | Customer Reviews | 4.6 4.6 out of 5 stars (3,395) 4.6 out of 5 stars | | Included Components | 1 x Carbon Monoxide Detector (with sealed battery), 1 x Manual | | Item Dimensions D X W X H | 3.3D x 12.5W x 6.7H centimetres | | Item Type Name | Carbon Monoxide Alarm | | Item Weight | 95 Grams | | Manufacturer | FireAngel | | Manufacturer Contact Information | FireAngel Safety Technology Limited, Vanguard Centre Coventry, CV4 7EZ, UK. | | Manufacturer Warranty Description | 5 year manufacturer's warranty. | | Material | Plastic | | Model Number | FA3820 | | Number Of Items | 1 | | Part Number | FA3820 | | Power Source | Battery Powered | | Product Style | Single | | Sensor Type | Electrochemical | | Unit Count | 1.0 count | | Upc | 816317006020 | ## Product Details - **Alarm:** Audible - **Brand:** Fireangel - **Colour:** White - **Item weight:** 95 Grams - **Material:** Plastic - **Power source:** Battery Powered - **Product dimensions:** 3.3D x 12.5W x 6.7H centimetres - **Sensor type:** Electrochemical - **Style:** Single - **Unit count:** 1.0 count ## Images ![FA3820 Carbon Monoxide Detector - Image 1](https://m.media-amazon.com/images/I/51gt0uac51L.jpg) ![FA3820 Carbon Monoxide Detector - Image 2](https://m.media-amazon.com/images/I/61+F9OGmbsL.jpg) ![FA3820 Carbon Monoxide Detector - Image 3](https://m.media-amazon.com/images/I/61pJmOw3xuL.jpg) ![FA3820 Carbon Monoxide Detector - Image 4](https://m.media-amazon.com/images/I/71e-tVNx4DL.jpg) ![FA3820 Carbon Monoxide Detector - Image 5](https://m.media-amazon.com/images/I/61PrpNhjPpL.jpg) ## Available Options This product comes in different **Colour Name, Size Name** options. ## Questions & Answers **Q: Silence mode how to set up? Pressing test button gives me alarm. What's the point then?** A: I don't think there is a set up procedure for silent mode. I think that after testing, when the alarm stops, the unit goes into silent mode for 5 minutes to reset itself and then starts monitoring again. **Q: To Seller: What is the battery (lithium) expiry date printed on the box? Thank you.** A: I bought one of these about a month ago. I don't have the box anymore, but the printing on the unit says replace by 09/2034. **Q: Can this be used outdoors for my patio heater ?** A: I wouldn't think so as if it's outdoors, any carbon monoxide would just disperse harmlessly in the air. It's only dangerous indoors. **Q: Contact seller I bought two they arrived today one is very quiet the other perfect us this a fault? The other is perfect please devise** A: When I activated the test procedure the alarm volume increased and was fairly loud. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple, reliable CO monitor. *by on Reviewed in the United Kingdom 8 July 2026* Good simple CO monitor that is reliable and last several years. This is the second one we have had. ### ⭐⭐⭐⭐⭐ Good quality well made *by on Reviewed in the United Kingdom 15 July 2026* Works really well, easy set up and you can move it about if you need to, it sits at the back of our woodburner, its piece of mind safety for the family. ### ⭐⭐⭐⭐ Easy to set up. *by on Reviewed in the United Kingdom 11 July 2026* Good size and price. Easy to set up. Alarm has good clear sound when tested. Hopefully I won’t hear it for real. Only negative thing is that the flashing light to say is working could be a little brighter. Otherwise a good product. ## Frequently Bought Together - FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White - FireAngel Optical Smoke Alarm 2-Pack - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White - FireAngel Heat Alarm with 10 Year Sealed For Life Battery, FA6720-R (HT-630 replacement, new gen), White --- ## 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.fi/products/470810555-fa3820-carbon-monoxide-detector](https://www.desertcart.fi/products/470810555-fa3820-carbon-monoxide-detector) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-08-14*