CDD4B400T12R

Outside Air Carbon Dioxide Sensor, 0-20,000 ppm, with non-heated enclosure, 1000 Ohm Platinum, IEC 751, 385 Alpha, thin film, Relay Output https://downloads.greystoneenergy.com/Submittals/PS-CDD4XXX.pdf https://downloads.greystoneenergy.com/Install%20Notes/IN-GE-CDD4XXX.pdf