Outdoor CO2 sensors
HVAC transmitters to measure CO2, temperature, relative humidity and ambient light level. Their IP65 enclosure is designed for outdoor or harsh-environment applications. In many situations, the integrated light sensor can be used to control the ventilation system in function of the occupancy of the space. Settings can be adjusted via Modbus RTU. The Sentera NDIR CO2 outdoor sensors transfer the measured values to a Modbus RTU register, they have no analogue outputs. The controller's algorithm creates a control output based on the measured temperature and relative humidity values. This control output value is written in a separate Modbus register.