Bluetooth Low Energy

Wireless carbon dioxide CO2 logger

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. If you add Efento 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 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
Check our prices

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Order a starter kit - $165 only

The offer is dedicated to companies only.

Check it yourself. The starter kit includes all you need to test Efento wireless sensors and Efento Cloud platform:
- NB-IoT temperature and humidity sensor
- Efento Cloud access
- Free shipping worldwide

Our customers

Newsletter May 2025

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