Dwyer Instruments CDTV-2N404 | Wall Voc & CO2 transmitter | Universal analog outputs | 2000 ppm CO2
The Dwyer CDTV-2N404 is a wall-mount CO₂ and VOC transmitter with a 0-2000 PPM CO₂ range, VOC measurement correlated to 0-2000 ppm CO₂ equivalent, and universal analog outputs. This model has no temperature output and no integral display and uses a North American housing.
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Part Number: CDTV-2N404
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Product Overview
The Dwyer CDTV-2N404 is part of the Series CDTV Carbon Dioxide/Volatile Organic Compound (VOC) transmitter range, designed to help reduce building energy costs by adjusting conditioned-air requirements according to occupancy.
By sensing both CO₂ and VOC, the transmitter can also detect fumes and other conditions 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-2N404 is a wall-mount model with North American housing, providing a CO₂ measurement range of 0 to 2000 PPM and a VOC output correlated to 0-2000 ppm CO₂ equivalent. It has no temperature output and does not include an integral LCD display.
CO₂ measurement uses a single-beam dual-wavelength NDIR sensor, allowing the transmitter to be used in spaces occupied 24 hours a day. VOC measurement uses a MEMS metal oxide semiconductor sensor.
Combining CO₂ and VOC sensing in a single transmitter can reduce the need for separate devices, wiring, and installation work. Its universal analog outputs can be configured for different current and voltage signal requirements and connected to building automation and ventilation control systems.
Need local display capability? The CDTV-2N404-LCD is the corresponding version with an integral LCD display.
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
- Single-beam dual-wavelength NDIR CO₂ sensor
- MEMS metal oxide semiconductor VOC sensor
- Jumper-selectable universal current and voltage outputs
- Compact wall-mount North American housing
- No temperature output
- No integral LCD display
- Suitable for demand-controlled ventilation and odor-control applications
- Suitable for spaces occupied 24 hours a day
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
The Dwyer CDTV-2N404 is suited for HVAC, building automation, ventilation, and facility-management applications where CO₂ and VOC monitoring is required without a local display or temperature output.
Typical applications include:
- Demand-controlled ventilation
- Odor-control applications
- Hospitals, schools, and commercial buildings
- Waiting rooms and other spaces occupied 24 hours a day
- Projects where combining CO₂ and VOC sensing can reduce installation costs
How to Specify & Commission It
- Mount the CDTV-2N404 according to the installation requirements for its North American wall-mount housing.
- 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 and VOC outputs to the building automation, ventilation, or control system.
- Verify the connected outputs and readings during commissioning.
- Allow for the specified response times of approximately 2 minutes for CO₂ and 5 minutes for VOC when checking changing conditions.
Frequently Asked Questions
What does the Dwyer CDTV-2N404 measure?
It measures CO₂ from 0 to 2000 PPM and VOC with an output correlated to 0-2000 ppm CO₂ equivalent.
Does the CDTV-2N404 measure temperature?
No. The CDTV-2N404 has no temperature output.
What sensors does the CDTV-2N404 use?
It uses a single-beam dual-wavelength NDIR sensor for CO₂ and a MEMS metal oxide semiconductor sensor for VOC.
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-2N404 have a display?
No. The CDTV-2N404 has no integral display. The CDTV-2N404-LCD is the corresponding version with an integral LCD.
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-2N404 VOC & CO₂ transmitter, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
