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| Product ⇅ | Price ⇅ | Battery Life (years) ⇅ | Alarm Sound Level (dB) ⇅ | Dimensions (inches) ⇅ | Display Type ⇅ | Sensor Range (feet) ⇅ | Digital Display ⇅ |
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First Alert SC5
US
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£95.54 ≈ | — | 85 dB，距离10英尺处 | 5.75 x 5.75 x 1.6 in | — | — | — |
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The First Alert SC5 is a battery-operated smart smoke and carbon monoxide alarm with electrochemical and photoelectric sensors, voice and location alerts, app notifications, and wireless interconnectivity. It suits homeowners who want connected whole-home alerts and a Nest Protect replacement. ★ 适合人群适合寻求可靠且精准的一氧化碳探测器的房主，因为它采用电化学一氧化碳传感器，可在距离10英尺处发出85 dB警报，并提供语音警报以识别危险位置，同时符合 UL 217 第10版标准。 |
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Kidde COPDLG, Model 21033781
US
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£45.55 ≈ | — | 85 | 5.47 x 2.9 x 1.89 in | 背光数字显示屏 | — | ✓ |
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The Kidde COPDLG is a plug-in alarm with AA battery backup that detects carbon monoxide, natural gas, and propane. It includes low-level CO alerts, an 85 dB alarm, and a backlit digital display, making it suitable for homes seeking broader gas protection and easier nighttime monitoring. ★ 适合人群它适合家庭使用，因为其电化学一氧化碳传感器、低浓度一氧化碳警报、可检测一氧化碳、天然气和丙烷的 3X 检测功能、背光数字显示屏以及 85 dB 报警声，能够提供更早且更醒目的警告。
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Kidde COP, Model 21033777
US
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£25.71 ≈ | 10 | 85 | 2.9 x 1.52 x 5.47 英寸 | 多色 LED 指示灯 | 10 | ✗ |
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The Kidde COP is a plug-in carbon monoxide alarm with an electrochemical sensor, rotating plug, multicolor LED indicators, and two AA batteries for temporary protection during power outages. It is designed for home use and includes HUSH, test, power-surge immunity, and a 10-year end-of-life notification. ★ 适合人群适合家庭使用，因为其电化学传感器能够准确检测一氧化碳，85 dB 报警声在 10 英尺处测定，并且 AA 备用电池可在短期停电期间保持保护功能。
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Kidde COPD, Model 21033779
US
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£32.32 ≈ | — | 85 | — | 数字背光显示屏 | — | ✓ |
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This plug-in carbon monoxide detector includes two AA backup batteries for continued detection during power outages and a digital backlit display that shows CO levels. It suits homeowners who want visible readings, electrochemical sensing, and reliable backup power in a standard home outlet. ★ 适合人群它适合家庭使用，因为结合了电化学传感器、85 dB 警报器、用于查看一氧化碳浓度的数字背光显示屏，以及可在停电期间提供保护的两节 AA 备用电池。 |
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Kidde COPDLQW, Model 21033783
US
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£55.49 ≈ | 10 | 85 | 2.9 x 1.52 x 5.47 in | 背光数字显示屏 | — | ✓ |
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The Kidde COPDLQW is a plug-in smart carbon monoxide alarm with an electrochemical sensor, low-level CO alerts, indoor air quality monitoring, Wi-Fi notifications, and two AA backup batteries. Its backlit digital display and mobile alerts suit homeowners who want visible readings and remote monitoring, including households with children, older adults, or pets. ★ 适合人群它适合用于可靠、准确的家庭一氧化碳检测，因为采用电化学传感器，可提供低浓度警报，配备 85 dB 警报器和背光数字显示屏，并可通过 Kidde 应用发送实时通知。
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