{"product_id":"4-in-1-co2-gas-detector-lcd-display-smoke-air-quality-monitor","title":"4-in-1 CO2 \u0026 Gas Detector with LCD Display | ALLOET","description":"\n\u003ch2\u003eALLOET 4-in-1 Air Quality \u0026amp; Gas Safety Monitor with Digital LCD Display\u003c\/h2\u003e\n\u003cp\u003eStay ahead of invisible threats with the ALLOET 4-in-1 Carbon Dioxide \u0026amp; Combustible Gas Detector. This plug-in safety device simultaneously monitors \u003cstrong\u003eCO₂ levels, combustible natural gas, temperature, and humidity\u003c\/strong\u003e — delivering real-time readings on a bright, backlit LCD screen so you always know what's in your air. Perfect for kitchens, garages, bedrooms, basements, RVs, hotel rooms, dorm rooms, and cruise cabins.\u003c\/p\u003e\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComprehensive 4-in-1 Monitoring:\u003c\/strong\u003e Tracks carbon dioxide (CO₂), combustible natural gas, temperature, and humidity simultaneously — giving you a full picture of your indoor environment in one compact device.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Operation:\u003c\/strong\u003e Simply plug into any standard 100–240V outlet for reliable, uninterrupted monitoring — no batteries required, no complicated setup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional-Grade Sensors:\u003c\/strong\u003e High-precision sensors deliver trustworthy, real-time environmental data so you can respond promptly to any changes in your indoor air quality.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBright Backlit LCD Screen:\u003c\/strong\u003e The high-brightness display presents all readings clearly, even in dim or low-light conditions — ideal for nighttime checks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Versatile Design:\u003c\/strong\u003e Measuring just 102×56×30 mm (approx. 4.02×2.2×1.18 in), this space-saving detector fits neatly in tight spots and travels easily for use in RVs, hotels, dorms, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudible Alarm:\u003c\/strong\u003e Triggers an alert when gas or CO₂ levels reach concerning thresholds, helping keep your household safe around the clock.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eALLOET\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e100–240V (Plug-In)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDetection Functions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCombustible Gas \/ Carbon Dioxide \/ Temperature \/ Humidity\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBacklit LCD Screen\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eShell Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eABS Plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eApprox. 102×56×30 mm \/ 4.02×2.2×1.18 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eBattery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eNot Required (Plug-In)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 4-in-1 Carbon Dioxide \u0026amp; Gas Detector\u003c\/li\u003e\n  \u003cli\u003e1 × Instruction Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cp\u003eColors may vary slightly from images due to monitor settings and lighting. Please allow a 1–2 cm tolerance in measurements due to manual measuring methods.\u003c\/p\u003e\n\n\u003cp\u003eFor general information on indoor air quality and home safety practices, visit the \u003ca href=\"https:\/\/www.epa.gov\/indoor-air-quality-iaq\" target=\"_blank\" rel=\"noopener\"\u003eU.S. Environmental Protection Agency – Indoor Air Quality resource\u003c\/a\u003e. Additional home safety guidance is available from the U.S. Consumer Product Safety Commission.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What gases and conditions does this 4-in-1 detector monitor?\u003c\/h4\u003e\n\u003cp\u003eA: The ALLOET 4-in-1 detector simultaneously monitors carbon dioxide (CO₂), combustible natural gas, ambient temperature, and humidity — all displayed in real time on the built-in LCD screen, making it a versatile all-in-one home air quality and safety monitor.\u003c\/p\u003e\n\u003ch4\u003eQ: Does the carbon dioxide and gas detector require batteries?\u003c\/h4\u003e\n\u003cp\u003eA: No — this device is fully plug-in operated and works with any standard 100–240V wall outlet. There are no batteries to purchase or replace, ensuring continuous, uninterrupted monitoring without extra maintenance.\u003c\/p\u003e\n\u003ch4\u003eQ: Where can I use this gas and CO₂ detector?\u003c\/h4\u003e\n\u003cp\u003eA: Its compact size makes it suitable for a wide range of spaces including kitchens, garages, basements, bedrooms, RVs, hotel rooms, dorm rooms, and cruise ship cabins — anywhere you want reliable air quality and gas safety monitoring.\u003c\/p\u003e\n\u003ch4\u003eQ: Will the alarm sound if gas or CO₂ levels become elevated?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The detector is equipped with an audible alarm that activates when monitored levels reach alert thresholds, providing an immediate warning so you can take action and ventilate the space promptly.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What gases and conditions does this 4-in-1 detector monitor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The ALLOET 4-in-1 detector simultaneously monitors carbon dioxide (CO₂), combustible natural gas, ambient temperature, and humidity — all displayed in real time on the built-in LCD screen, making it a versatile all-in-one home air quality and safety monitor.\"}}, {\"@type\": \"Question\", \"name\": \"Does the carbon dioxide and gas detector require batteries?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this device is fully plug-in operated and works with any standard 100–240V wall outlet. 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