Johnson Controls offers carbon dioxide (CO2) and temperature transmitters for measuring and transmitting CO2 levels, ranging from 0 to 2,000 parts per million (ppm) and temperatures, ranging from 32 to 122°F (0 to 50°C) within HVAC CO2 and temperature applications. Specific HVAC CO2 applications include Demand Control Ventilation (DCV), fresh air and Indoor Air Quality (IAQ), and rooftop air handling Economizer controls systems. This compact wall-mounted device produces 0 to 10 V and 4 to 20 mA signal for CO2 output and provides connections to a platinum temperature sensor (Pt1000 RTD). It is designed to work as part of any
integrated Building Automation System (BAS). The CO2 and temperature transmitter is easy to install and requires no maintenance or field calibration.

This multifunctional CO2 and temperature transmitter uses an advanced CO2 sensing technology. The second-generation, silicon-based CARBOCAP® sensor provides stability and reliability. The CARBOCAP sensor operates in accordance with the single-beam, dual-wavelength method. This patented sensor has unique reference measurement capabilities, offering excellent stability over five years in typical HVAC applications.