These multifunctional HVAC transmitters measure temperature, relative humidity, CO2 and ambient light level. Their IP65 enclosure is designed for outdoor applications or applications in harsh environments. In many applications, the integrated light sensor can be used to control the ventilation system in function of the occupancy of the space. All settings can be adjusted via Modbus RTU. Sentera CO2sensorstransmit the measured values into an analogue output or a Modbus RTU register. The algorithm ofintelligent sensors controla single analogue output based on the measured temperature, relative humidityh and CO2 values. They can directly control an EC fan, an AC fan speed controller or a damper actuator.