Additional specifications and description
HVAC transmitter for harsh environments
People and animals produce CO2 or carbon dioxide while breathing. That makes CO2 concentration a good indicator for the occupancy and activity level in a space. In many applications, CO2 sensors are used as an indicator for the ventilation requirements. This HVAC transmitter measures temperature, relative humidity, CO2 and ambient light level. Based on the temperature and humidity, the dew point is calculated. All values are available via Modbus RTU communication.
NDIR sensor technology
NDIR or Nondispersive Infrared technology is used to measure the CO2 level. This technology offers a low life-cycle cost and a precise and stable long-term operation.
Reduced installation time
One RJ45 connector is all it takes to connect this sensor! Modbus RTU communication and the power supply are connected via one UTP cable - we call it Power over Modbus or PoM. All measured values are available via Modbus RTU communication. The supply voltage is 24 VDC. To facilitate wiring, we recommend to use a Sentera 24 VDC power supply with RJ45 connector. These power supplies offer protection against short circuit, overload and overvotage. A 24 VDC supply voltage increases the electrical safety and reliability of your installation
Easy to use!
This sensor doesn't require configuration. Once installed, it is ready to use. The default settings will do for most applications. If necessary, the settings can be adjusted via Modbus RTU.
E.g. the temperature range, the relative humidity range or the CO2 range can be adjusted via Modbus RTU. Also the light intensity of the LEDs for status indication is adjustable. The Modbus register map provides a complete overview of all adjustable settings.
Self-calibrating to compensate sensor drift
The ABC logic self-calibrating algorithm is by default enabled. This algorithm is designed to be used in applications where CO2 concentrations will drop to outside ambient conditions (400 ppm) at least one time (15 minutes) in a 7day period, which is typically seen during unoccupied periods. The sensor will reach its operational accuracy after 25 hours of continuous operation at a condition that it was exposed to ambient reference levels of air at 400 ppm ± 10 ppm CO2.
Corrosion protected and Ammonia resistant
The electronic components and pcb of this CO2 transmitter are treated with a corrosion protective and ammonia resistant coating. This makes the sensor extremely suitable for the agricultural sector or applications with high humidity. Each sensor is calibrated and tested in our factory. In the unlikely event of CO2 sensor element failure, this module can be replaced. We use sensor elements and components of high quality. This ensures the long-term stability and accuracy of this HVAC transmitter. The enclosure offers an IP65 protection against ingress of dust and moisture. To ensure optimal performance, it should be protected from direct sunlight.