Trac10308 Carbon Dioxide CO2 BLE Sensor measures gas concentration and transmit its values over Bluetooth Low Energy. On top of the gas concentration, the logger also measures temperature, humidity and barometric pressure.
You can use a free mobile application to configure the device and read the data from its memory. If you add Gateway, you can build a remote monitoring system.

• CO2: 400 ppm – 5000 ppm, accuracy ±(40 ppm + 5 % of reading)
• Temperature: -15 to +70°C, accuracy: up to 0.4°C
• Humidity: 0 to 99% RH, accuracy up to 4% in the range of 0 to 80%
• Pressure: 300 to 1100 hPa, absolute accuracy +/- 3 hPa at 0 to + 65°C, relative +/- 0.12 hPa at 0 to + 65°C, p = 800 – 900 hPa
• Battery ensures up to 5 years of maintenance-free operation
• Measurement period: 1 minute – 10 days (configurable by the user)
• User configurable alarm thresholds. If any of the thresholds is exceeded, sensor will send the data to the platform immediately
• The device stores 40,000 measurements in its memory, when the memory is full, the oldest measurements are overwritten
• Add Gateway and Cloud to build a real time monitoring system. The maximum distance between the sensor and the Gateway is 100 m in the open space and 20 – 30 m in the buildings
• Use a free mobile application to configure the logger, read the data from its memory, generate reports and set alert thresholds