Duct Mounted
Wall Mounted
Duct Mounted

Dwyer SERIES CDTV CO2/VOC Transmitter

Dwyer SERIES CDTV Carbon Dioxide/Volatile Organic Compound (VOC) Transmitter reduces energy cost in buildings by lowering the amount of conditioned air based on the occupancy of the space. By sensing both CO2 and VOC, the transmitter can detect fumes that may need to be exhausted during lower occupancy periods.

Applications: HVAC applications in hospitals, schools, and commercial buildingsDemand control ventilationOdor controlWaiting rooms or other spaces that may be occupied 24 hours a day

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Tax /GST included

Dwyer Series CDTV Carbon Dioxide/Volatile Organic Compound Transmitter simultaneously outputs Both CO2 / VOC.


• Combination VOC and CO2 outputs reduce labor and material costs

• Single beam dual wavelength NDIR CO2 sensor allows for use in spaces that may be occupied 24 hours a day

• VOC output is correlated to be equivalent to CO2 measurements

• Ventilate using ASHRE’s occupancy-based VRP Algorithm

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Data sheet

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CO2: 0-2000 ppm & VOC:0 to 2000 ppm CO2 equivalent.
CO2: ±40 ppm ±3% of reading.
Pressure dependency
CO2: 0.13% of reading per mm of Hg.
Response Time
CO2: 2 minutes for 99% step change; VOC: 5 minutes.
CO2: Single-beam, dual-wavelength NDIR; VOC: MEMS metal oxide semiconductor
Temperature Limits
32 to 122°F (0 to 50°C).
16 to 35 VDC / 19 to 28 VAC
Temperature Dependance
±8 ppm / °C at 1100 ppm.
Non Linearity
CO2: 16 ppm.
Duct Air velocity
0-4000 FPM (20.32 m/s).
Power Consumption
Average: 2 watts; Peak: 3.75 watts
Current: 0 to 20 mA, 4 to 20 mA, 0 to 10 mA, or 2 to 10 mA (depending on selection jumper, max 500 O); Voltage: 0 to 10 VDC, 2 to 10 VDC, 0 to 5 VDC, or 1 to 5 VDC (depending on selection jumper, min 500 O); Relay: SPST NO 2A @ 30 VDC
Agency Approval
Duct mount: NEMA 4X (IP66) for housing only; Wall mount: IP20.

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