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The Triplett GSM250 Desktop Indoor Air Quality CO2 Meter can be used to monitor air quality in office buildings, schools, exhibition halls, shopping malls, meeting rooms, fitness centers, restaurants and other public places. It simultaneously displays CO2, Temperature and Relative Humidity. It can be used on the desktop or wall mounted and has a display with a light bar for easy reading from long distances. A 3-color light bar (green / yellow / red) changes color with CO2 concentration.

Triplett GSM400 Portable Indoor Air Quality CO2 Meter

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Carbon Dioxide (CO2), Carbon Monoxide (CO) and Oxygen (O2) Handheld Detector

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CO2 Meter 3IN1/5 IN 1 Temperature Humidity Sensor Tester Air Quality Monitor Carbon Dioxide TVOC Formaldehyde HCHO Detector

LCD screen with large digital display, clear and easy to read. Intelligent backlight, soft and eye protection.

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3-1 Carbon Monoxide Detector Portable Mini Air Quality Monitor with Lanyard Smoke Alarm CO Gas Meter Temperature Humidity Sensor Built-in 1000mAh Battery, Indoor/Outdoor (Black) - Yahoo Shopping

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