CSPARKV （7.6×7.6×3cm）Portable CO2 Detector, Indoor Air Quality Monitor CO2 Detector with NDIR Sensor and LCD Display, CO2 Monitor with Alarm for Home, Office

High Precision Sensor This CO2 detector adopts advanced NDIR sensor, which detects carbon dioxide by infrared detection technology with high precision, strong anti-interference and excellent stability.

Dual Alarm Function This CO2 detector has CO2 indicator lights on its screen - green light for good concentration (400~699ppm), yellow light for average concentration (700~1499ppm), and red light for dangerous concentration (1499~5000ppm). When the detected CO2 concentration exceeds 1500 ppm, the device will alarm to remind you. The CO2 alarm value is customizable.

Portable and Durable This CO2 monitor is small, you can take it anywhere and hang it with the included lanyard. This CO2 monitor comes with a built-in 1000mAh lithium battery that can be fully charged in 3 hours and last for about 72 hours.

Large LCD Display This portable CO2 detector features a large color LCD display, which is easy to read and pleasant to the eye. If it is not used for 5 minutes, it will automatically switch to the energy-saving ECO mode, without disturbing the environment.

Wide Application This CO2 monitor is suitable for home, office, grow tent, greenhouse, production warehouse and more. NOTE: We recommend that when using the detector for the first time, place the device in an open, unpopulated environment and manually calibrate it once to avoid inaccurate readings.