Dwyer Instruments SERIES CDX Catalog Page

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RoHS

Series

CDX

Wall Mount Carbon Dioxide Transmitter

Measures up to 2000 ppm, Adjustable Output

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The Series CDX Carbon Dioxide Transmitter is a low cost and high performing CO2

sensor. This product will provide immediate energy savings by functioning in conjunction
with building automation systems and allowing the user to effortlessly and effectively
control fresh air into preferred areas. On-Demand ventilation using CO2 sensors prevents
energy losses from over ventilation while maintaining indoor air quality. The potential for
the greatest energy saving occurs in areas where occupancy alters over the duration of the
day. The Series CDX Transmitters utilize the patented Automatic Background Calibration
(ABC) Logic self-calibration system. ABC Logic virtually eliminates the need for manual
calibration in applications where the indoor CO2 level drops to outside levels during
unoccupied periods. If the transmitter is being used in an application where a building is
continuously occupied 24 hours per day, then the user will permit that the ABC Logic
feature be turned off.

Model
CDX-2W10
CDX-2W20
CDX-2E10
CDX-2E20

ACCESSORIES
Model 1508, Duct Mount Enclosure
Model 1552, Outside Air Measurement Enclosure

Output

Current
Voltage
Current
Voltage

Housing

North America
North America
Europe
Europe

North American European

North American

SPECIFICATIONS
Range: 0 to 2000 PPM.
Accuracy: ±30 PPM or 3% of reading,

whichever is higher. CO2 accuracy
statement excludes standard gas used
for calibration that has an accuracy of
2% and there is a potential digital to
analog error of up to 1%.
Temperature Dependence: 0.2% FS
per °C (± 0.11% per °F).
Stability: < 2% of FS over life of
sensor (15 years).
Pressure Dependence: .135% of
reading per mm of Hg.

Response Time: 5 s.
Warm Up Time: < 2 min (operational),

10 min (max. accuracy).

Temperature Limits:

Operating: 32 to 122°F (0 to 50°C);
Storage: -40 to 158°F (-40 to 70°C).

European

Humidity Limits: 0 to 95% relative

humidity, non-condensing.
Power Requirements: 18 to 30 VAC
RMS, 50/60 Hz, or 18 to 42 VDC,
polarity protected.
Power Consumption: .7 W @ nominal
voltage of 24 VAC RMS.
Sensor: Non-dispersive infrared
(NDIR) absorption.
Output: Analog, 0 to 5 V or 0 to 10 V
jumper selectable (100 Ω output
impedance), 4 to 20 mA (RL maximum
500 Ω).
Housing: Flammability classification
UL94 5VA.
Weight: European Housing: 5.44 oz
(154 g); North American Housing: 6.24
oz (177 g).

Agency Approvals: CE, RoHS.

AIR QUALITY

Carbon Dioxide

Transmitters