CO2 Carbon Dioxide Meter (with Temperature and Humidity Meter) CHE-C1

[Tabletop CO2 (carbon dioxide) meter that detects CO2, measures and displays temperature and humidity]

●This CO2 (carbon dioxide) meter measures and displays CO2 (carbon dioxide), temperature, and humidity.
●It monitors the air environment in living rooms and children's rooms at home, offices and conference rooms at companies, public facilities such as libraries, hotel rooms, greenhouses at farms, cars, etc.
●It alerts you with sound and light when the CO2 (carbon dioxide) concentration level is high.
●It can also be operated with a built-in battery.
●A battery level icon is displayed so you know when it needs charging.
●Charging is easy with a USB charging cable.
*AC adapter is not included, so please prepare one separately.
●It uses the NDIR sensor method recommended by the Ministry of Economy, Trade and Industry.

＜Installation Guidelines＞
*One unit is recommended for every 30 to 50 cubic meters. For areas larger than 50 cubic meters, it is recommended to install two or more units.
※Since CO2 is heavier than oxygen, it tends to accumulate at the bottom, but if there are people present or even slight airflow, it will mix with O2.
CO2 meters measure CO2 that enters naturally through the intake port, so in an environment with absolutely no airflow, the measured value may vary depending on the location.

■Measurement range and measurement items: CO2/400 to 6000ppm, temperature/-20 to 50 degrees, humidity/1 to 99%RH (non-condensing)
■Resolution: CO2/1ppm, temperature/0.1 degrees, humidity/1%RH
■Accuracy: CO2/+-50ppm + 5% of reading (400 to 5000ppm), temperature/+-1.5 degrees, humidity/0% to 80%RH +-5%RH, others +-10%RH
■LED alarm (CO2): Green (400 to 1000ppm), yellow (1000 to 2000ppm), red (2000ppm to )
■Buzzer alarm (CO2): None (400 to 1000ppm), once every 2 seconds (1000 to 2000ppm), twice/1 second interval (2000ppm to )
■CO2 sensor type: Non-dispersive infrared (NDIR) gas sensor
■Data update: within 1 second
■Power supply: 3.7V lithium-ion battery (built-in) 2000mAh
■Charging port: USB Type-C (for DC5V 1A)
■Operating time: 8 hours (when using the built-in battery), charging time 4 hours
■Operating environment: -10 to 50 degrees Celsius, 85% RH or less (no condensation)
*Although the temperature measurement display on the main unit shows -20 to 50 degrees Celsius, the operating environment including other components is -10 to 50 degrees Celsius.
■Storage environment: -20 to 60 degrees Celsius, 90% RH or less (no condensation)
■Size: W91.8 x D36 x H97.8 mm
■Weight: Approx. 198 g
■Set includes: Main unit, USB charging cable 1m (USB Type-C to USB A), instruction manual (warranty)
≪Calibration function≫
Automatic calibration method
1. Turn on the power and leave it outdoors (in a place with clean air) for 20 minutes.
2. Press and hold the "Up arrow ▲, Down arrow ▼" buttons on the back simultaneously for more than 3 seconds and confirm that you hear a "di-di-di..." sound.
3. The device will enter automatic calibration mode and the monitor will continuously display 150 seconds. Do not operate the product during this time.
4. The countdown will begin from the 150 displayed on the monitor, and will return to the original display when completed.
※If 6000 ppm is displayed after performing this procedure, please repeat steps 2 to 5. Please try the calibration (correction) process again.