Dwyer Instruments CDTV-2D4E4 | Duct VOC & CO2 transmitter | Universal analog outputs | 2000PPM CO2 | PT1K Ohm RTD temperature sensor
The Dwyer CDTV-2D4E4 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 Pt1000 Ω RTD temperature sensor. The transmitter features a NEMA 4X (IP66) duct housing.
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Part Number: CDTV-2D4E4
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Product Overview
The Dwyer CDTV-2D4E4 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 detect changes in indoor air conditions and identify fumes that may require additional exhaust or ventilation during lower-occupancy periods. Combining these measurements in one device can help reduce the need for separate transmitters in HVAC and building automation applications.
The CDTV-2D4E4 is a duct-mount model with a 0-2000 PPM CO₂ range, a VOC output correlated to 0-2000 ppm CO₂ equivalent, and a Pt1000 Ω RTD 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 provides CO₂ and VOC outputs from one transmitter while also providing a temperature signal through the Pt1000 Ω RTD.
The transmitter provides jumper-selectable universal current and voltage outputs for integration with building automation, HVAC, and ventilation control systems. Its duct housing is rated NEMA 4X (IP66), with a specified duct air velocity range of 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
- Pt1000 Ω RTD 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-2D4E4 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, VOC, and temperature monitoring
How to Specify & Commission It
- Install the CDTV-2D4E4 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-2D4E4 measure?
It measures CO₂ from 0 to 2000 PPM, VOC with an output correlated to 0-2000 ppm CO₂ equivalent, and temperature using a Pt1000 Ω RTD sensor.
What sensors does the CDTV-2D4E4 use?
It uses a single-beam dual-wavelength NDIR sensor for CO₂, a MEMS metal oxide semiconductor sensor for VOC, and a Pt1000 Ω RTD 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-2D4E4 have a display?
No. The CDTV-2D4E4 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-2D4E4 VOC & CO₂ transmitter, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
