With an infrared sensor (IR sensor) specifically for carbon dioxide.
With sensors for room temperature and relative humidity.
The device is in normal applications maintenance-free, calibration usually not neccessary. If required, calibration can be carried out by a specialist.
Plastic housing, suitable for wall mounting or flush mounted box.
Measuring range: 0-3,000 ppm +/- 2% MBE.
Digital output either Ethernet TCP/IP or Modbus RTU protocol.