Efento wireless carbon dioxide (CO₂) logger 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. 

• 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 Efento Gateway and Efento 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