Dwyer Instruments CDTV-2D4F4 | Duct VOC & CO2 transmitter | Universal analog outputs | 2000PPM CO2 | 20K Ohm temperature sensor
The Dwyer CDTV-2D4F4 is a duct-mount CO₂ and VOC transmitter with a 0-2000 PPM CO₂ range, VOC measurement correlated to 0-2000 ppm CO₂ equivalent, universal analog outputs, and a 20 kΩ thermistor temperature sensor. The transmitter features a NEMA 4X (IP66) duct housing.
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Part Number: CDTV-2D4F4
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Product Overview
The Dwyer CDTV-2D4F4 is part of the Series CDTV Carbon Dioxide/Volatile Organic Compound (VOC) transmitter range, designed to help reduce building energy costs by adjusting the amount of conditioned air according to occupancy.
By measuring both CO₂ and VOC, the transmitter can identify changes in indoor air conditions and detect fumes that may require additional exhaust or ventilation during lower-occupancy periods. This makes combined CO₂ and VOC monitoring useful for demand-controlled ventilation and odor-control applications.
The CDTV-2D4F4 is a duct-mount model with a 0-2000 PPM CO₂ range, a VOC output correlated to 0-2000 ppm CO₂ equivalent, and a 20 kΩ thermistor temperature sensor.
CO₂ measurement uses a single-beam dual-wavelength NDIR sensor, while VOC measurement uses a MEMS metal oxide semiconductor sensor. The combined sensing arrangement allows CO₂ and VOC monitoring from one transmitter rather than requiring separate devices.
The transmitter provides jumper-selectable universal current and voltage outputs for integration with building automation, HVAC, and ventilation control systems. The duct housing is rated NEMA 4X (IP66), while the specified duct air velocity range is 0-4000 FPM (20.32 m/s).
Key Benefits
- Simultaneous CO₂ and VOC measurement from one transmitter
- 0-2000 PPM CO₂ measurement range
- VOC output correlated to 0-2000 ppm CO₂ equivalent
- 20 kΩ thermistor temperature sensor
- Single-beam dual-wavelength NDIR CO₂ sensor
- MEMS metal oxide semiconductor VOC sensor
- Jumper-selectable universal current and voltage outputs
- NEMA 4X (IP66) duct housing
- Duct air velocity range of 0-4000 FPM (20.32 m/s)
- Suitable for demand-controlled ventilation and odor-control applications
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
The Dwyer CDTV-2D4F4 is suited for HVAC engineers, building automation professionals, facility managers, and ventilation-control applications requiring CO₂, VOC, and temperature monitoring directly within ductwork.
Typical applications include:
- Demand-controlled ventilation
- HVAC and building automation systems
- Odor-control applications
- Hospitals, schools, and commercial buildings
- Projects requiring combined CO₂ and VOC monitoring in duct air
How to Specify & Commission It
- Install the CDTV-2D4F4 in the duct according to the installation requirements.
- Connect the required 16-35 VDC or 19-28 VAC power supply.
- Set the required current or voltage output using the jumper-selectable configuration.
- Connect the CO₂, VOC, and temperature outputs to the appropriate controller.
- Verify the transmitter readings and output signals during commissioning.
- Allow for the specified response times of approximately 2 minutes for CO₂ and 5 minutes for VOC when checking changing conditions.
- Ensure the duct air velocity remains within the specified 0-4000 FPM range.
Frequently Asked Questions
What does the Dwyer CDTV-2D4F4 measure?
It measures CO₂ from 0 to 2000 PPM, VOC with an output correlated to 0-2000 ppm CO₂ equivalent, and temperature using a 20 kΩ thermistor.
What sensors does the CDTV-2D4F4 use?
It uses a single-beam dual-wavelength NDIR sensor for CO₂, a MEMS metal oxide semiconductor sensor for VOC, and a 20 kΩ thermistor for temperature measurement.
What analog outputs are available?
The transmitter provides jumper-selectable current outputs of 0-20, 4-20, 0-10, or 2-10 mA, with a maximum load of 500 Ω. Voltage outputs include 0-10, 2-10, 0-5, or 1-5 VDC, with a minimum load of 500 Ω.
How accurate is the CO₂ measurement?
The specified CO₂ accuracy is ±40 ppm + 3% of reading.
How fast does the transmitter respond?
The response time is approximately 2 minutes for a 99% CO₂ step change and 5 minutes for VOC.
Does the CDTV-2D4F4 have a display?
No. The CDTV-2D4F4 does not include an integral display.
What is the duct air velocity range?
The specified duct air velocity range is 0-4000 FPM (20.32 m/s).
What is the enclosure rating?
The duct housing is rated NEMA 4X (IP66).
What is the power requirement?
The transmitter operates from 16-35 VDC or 19-28 VAC. Average power consumption is approximately 2 W, with a peak of 3.75 W.
Is genuine Dwyer stock available with UAE shipping?
Yes. General Tech Services LLC offers genuine Dwyer Instruments stock with free UAE-wide shipping. Call +971 6 5436933 for pricing and current availability.
Request a Quote Today
For pricing, availability, or assistance specifying the Dwyer CDTV-2D4F4 VOC & CO₂ transmitter, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
