{"pageUrl":"https://www.comparethespecs.com/home-living/home-security/which-carbon-monoxide-detector-offers-the-best-value-for-money-under-100","lastUpdated":"2026-09-13","totalProducts":5,"niche":"Which carbon monoxide detector offers the best value for money under $100?","description":"Which carbon monoxide detector offers the best value for money under $100?","products":[{"brand":"FireAngel","model":"FA3322 10 Year Battery Digital Carbon Monoxide Alarm","price_gbp":31.64,"origin_country":null,"specs":{"dimensions":"5.08 x 2.99 x 1.22 in","battery_life":"10","display_type":"LCD","digital_display":"CO levels, temperature, humidity and status messages","alarm_sound_level":"85"},"confidence_score":null,"sources":[{"label":"FireAngel","url":"https://www.fireangel.co.uk/products/fa3322-carbon-monoxide-alarm/","currency":"USD","source_country":"US","price":43.0,"price_gbp":31.64,"scraped_at":"2026-08-28T04:13:13.533396"},{"label":"Fire Detection Shop","url":"https://www.firedetectionshop.co.uk/products/fireangel-fa3322-10-year-battery-carbon-monoxide-alarm-w-digital-display","currency":"USD","source_country":"US","price":43.68,"price_gbp":32.14,"scraped_at":"2026-08-28T04:13:13.533396"},{"label":"Desertcart UK","url":"https://www.desertcart.co.uk/products/494129437-fireangel-fa3322-digital-co-alarm-with-10-year-sealed-life","currency":"USD","source_country":"US","price":169.86,"price_gbp":124.99,"scraped_at":"2026-08-28T04:13:13.533396"}],"summary":"The FireAngel FA3322 is a sealed 10-year carbon monoxide alarm with an electrochemical sensor and colour-coded LCD display. It suits bedrooms, living spaces, caravans and other domestic areas where clear visual alerts and maintenance-free protection are valuable.","ideal_for":"It offers strong value under $100 with a 10-year sealed battery, 85 dB alarm, electrochemical sensing and a digital LCD showing CO levels, temperature and humidity."},{"brand":"Kidde","model":"K5CO Carbon Monoxide Alarm","price_gbp":13.24,"origin_country":null,"specs":{"dimensions":"5.0 x 2.9 x 1.5 in","display_type":"LED indicators","digital_display":false,"alarm_sound_level":"85"},"confidence_score":null,"sources":[{"label":"Safe Fire Direct","url":"https://www.safefiredirect.co.uk/kidde-5co-battery-powered-carbon-monoxide-alarm.aspx","currency":"USD","source_country":"US","price":17.99,"price_gbp":13.24,"scraped_at":"2026-08-28T04:13:13.533396"}],"summary":"The Kidde K5CO is a compact, battery-powered carbon monoxide alarm with an electrochemical sensor, continuous monitoring, test/reset button, and green and red LED status indicators. Its 85 dB alarm, 10-year sensor life, and wall-mount or freestanding installation make it suitable for homes and other indoor living areas.","ideal_for":"It offers strong value under $100 with an 85 dB alarm, electrochemical sensor, continuous monitoring, replaceable AA batteries, and a 10-year sensor life at a low purchase price."},{"brand":"FireAngel","model":"Carbon Monoxide Alarm","price_gbp":23.91,"origin_country":null,"specs":{"battery_life":"10","display_type":"LCD","digital_display":true,"alarm_sound_level":"85"},"confidence_score":null,"sources":[{"label":"FireAngel","url":"https://www.fireangel.co.uk/products/fa3322-carbon-monoxide-alarm/","currency":"USD","source_country":"US","price":43.0,"price_gbp":31.64,"scraped_at":"2026-08-29T07:12:30.067394"},{"label":"Toolstation","url":"https://www.toolstation.com/fireangel-10-year-digital-carbon-monoxide-alarm-sealed-for-life-battery/p97377","currency":"USD","source_country":"US","price":39.99,"price_gbp":29.43,"scraped_at":"2026-08-29T07:12:30.067394"},{"label":"Safe Fire Direct","url":"https://www.safefiredirect.co.uk/fireangel-fa3322-10-year-digital-display-carbon-monoxide-alarm.aspx","currency":"USD","source_country":"US","price":32.5,"price_gbp":23.91,"scraped_at":"2026-08-29T07:12:30.067394"}],"summary":"The FireAngel FA3322 is a carbon monoxide alarm with a backlit LCD that displays CO levels, temperature and humidity. It has a sealed 10-year lithium battery, electrochemical sensor, low-level CO monitoring and quiet self-testing, making it suitable for homes, bedrooms, caravans and motorhomes.","ideal_for":"It offers strong value under $100 because it combines a 10-year maintenance-free battery, 85 dB alarm, electrochemical sensing and a digital LCD with real-time CO, temperature and humidity readings."},{"brand":"Kidde","model":"4MCO Hardwired CO Alarm","price_gbp":35.84,"origin_country":null,"specs":{"dimensions":"5.79 x 5.79 x 1.65 in"},"confidence_score":null,"sources":[{"label":"Safe Fire Direct","url":"https://www.safefiredirect.co.uk/kidde-k4mco-mains-powered-carbon-monoxide-alarm.aspx","currency":"USD","source_country":"US","price":48.71,"price_gbp":35.84,"scraped_at":"2026-08-29T07:12:30.067394"}],"summary":"The Kidde 4MCO is a hardwired 230V carbon monoxide alarm with an electrochemical sensor and rechargeable lithium battery backup. It is suited to homes, workplaces, and interconnected alarm systems requiring continued operation during mains power failures.","ideal_for":"It offers good value under $100 for buyers who want a hardwired alarm with a rechargeable backup battery, electrochemical CO sensing, seven-year alarm life, and interconnection with other compatible Kidde alarms."},{"brand":"First Alert","model":"CO400 CO Detector Alarm","price_gbp":16.15,"origin_country":null,"specs":{"dimensions":"3.4 x 1.4 x 4.9 in","battery_life":"5","display_type":"No display","digital_display":false,"alarm_sound_level":"85"},"confidence_score":null,"sources":[{"label":"First Alert Store","url":"https://www.firstalertstore.com/store/products/co400-basic-battery-operated-carbon-monoxide-alarm.htm","currency":"USD","source_country":"US","price":21.95,"price_gbp":16.15,"scraped_at":"2026-08-29T07:12:30.067394"},{"label":"The Home Depot","url":"https://www.homedepot.com/p/First-Alert-Battery-Powered-Carbon-Monoxide-Alarm-CO400/202433876","currency":"USD","source_country":"US","price":22.97,"price_gbp":16.9,"scraped_at":"2026-08-29T07:12:30.067394"}],"summary":"The First Alert CO400 is a battery-operated carbon monoxide alarm with an electrochemical sensor, single-button testing and silencing, an 85 dB alarm, and an end-of-life timer. It suits homes, apartments, RVs, and other spaces needing affordable basic CO protection without a digital readout.","ideal_for":"It offers strong value under $100 with a 5-year battery life, loud 85 dB alarm, electrochemical sensor, and low purchase price, although it does not include a digital display."}]}