




Dwyer Instruments CDTV-2D4E4 | Duct VOC & CO2 transmitter | Universal analog outputs | 2000PPM CO2 | PT1K Ohm RTD temperature sensor
A carbon dioxide/volatile organic compound (VOC) transmitter, the Series CDTV, Model CDTV-2D4E4 lowers energy costs in buildings by adjusting the amount of conditioned air according to the occupancy of the space. The transmitter can identify vapors that might need to be expelled during times of lesser occupancy by detecting both CO2 and VOC.

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- Specifications
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Accuracy | CO2: +/-40 ppm +/-3% of reading |
Approvals | CE |
Enclosure Rating | Duct mount: NEMA 4X (IP66) for housing only Wall mount: IP20 |
Manufacturer | Dwyer Instruments |
Maximum operating temperature | 32 to 122°F (0 to 50°C) |
Non Linearity | CO2: 16 ppm |
Output | 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 |
POWER CONSUMPTION | Average: 2 watts Peak: 3.75 watts |
Power | 16 to 35 VDC / 19 to 28 VAC |
PRESSURE | Dependence: CO2: 0.13% of reading per mm of Hg |
Range | CO2: 0 to 2000 or 0 to 5000 ppm (depending on model) VOC: 0 to 2000 ppm CO2 equivalent |
Range | Duct Air Velocity: 0-4000 FPM (20.32 m/s) |
Response Time | CO2: 2 minutes for 99% step change; VOC: 5 minutes |
Sensor Type | CO2: Single-beam, dual-wavelength NDIR; VOC: MEMS metal oxide semiconductor |
Temperature | Dependence: +/-8 ppm / °C at 1100 ppm |
Type | Carbon Dioxide/Volatile Organic Compound Transmitter |
Weight | 5.6 oz (158.8 g) |
- Combination CO2 and VOC outputs lower material and labor costs.
- Single beam dual wavelength NDIR CO2 sensor allows for usage in locations that may be used 24 hours a day.
- There is a correlation between VOC emission and CO2 measurements.
- Utilize ASHRE's occupancy-based VRP Algorithm for ventilation.
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