




Dwyer Instruments CDSN | Carbon Dioxide/Temperature transmitter | Wall mount | Universal current/voltage output | 2000 PPM
To help achieve LEED® certification and energy savings, the Model CDSN Carbon Dioxide Transmitter precisely monitors the temperature and CO2 concentration in office buildings, schools, and other indoor areas. Digital barometric pressure adjustment is a feature of the Model CDSN that aims to increase accuracy. To interact with almost any building management controller, customers can choose the transmitter output to be 4-20 mA, 0-5 VDC, or 0-10 VDC using the CO2 universal output. The home security function also lessens the possibility of physical manipulation.

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- Specifications
- Features
- Downloads
Accuracy | +/-40 PPM +3% of reading |
Approvals | CE |
Connection | Electrical: Screw terminals |
ENCLOSURE MATERIAL | ABS |
Enclosure Rating | NEMA 1 (IP30) |
Humidity | Limits: 0 to 85%, non-condensing |
Manufacturer | Dwyer Instruments |
Maximum operating temperature | Operating: 32 to 122°F (0 to 50°C) Storage: -22 to 158°F (-30 to 70°C) |
Output Signal | Field selectable Current: 4-20 mA or 0-20 mA Voltage: 0-5 V, 1-5 V, 0-10 V, or 2-10 V |
Power | 24 VAC/VDC +/- 20%, 50/60 Hz |
Range | 0 to 2000 PPM |
Response Time | < 120 s (????90) |
Sensor Type | NDIR, 15 year life expectancy |
TEMPERATURE SENSOR | Accuracy: +/-1°C @ 25°C |
Type | Carbon Dioxide Transmitter |
Warm up time | < 2 minutes operational; 10 minutes max accuracy |
- Combine temperature and CO2 measurement with DIP switch selectable current/voltage outputs to reduce inventory and save time.
- Integral passive temperature minimizes the amount of equipment installed in the area and requires little upkeep thanks to Automatic Baseline Correction (ABC), which takes sensor drift into account.
- Lower operating costs by employing a CO2 sensor that is low energy, consistent, and dependable.
- Utilize backplate electrical connections to streamline installation.
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