Dwyer Instruments CDTV-2N404-LCD | Wall Voc & CO2 transmitter | Universal analog outputs | 2000 ppm CO2 with LCD display
The Dwyer CDTV-2N404-LCD is a wall-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 an integral LCD display. This model has no temperature output and uses a North American housing.
Genuine Dwyer Instruments stock · Free UAE-wide shipping
Part Number: CDTV-2N404-LCD
Request a quote in under a minute — call +971 6 5436933.
Product Overview
The Dwyer CDTV-2N404-LCD 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 also identify fumes and other air-quality conditions that may require increased ventilation, even during periods of lower occupancy. This makes combined CO₂ and VOC sensing useful for demand-controlled ventilation and odor-control applications.
The CDTV-2N404-LCD is a wall-mount model with North American housing and measures CO₂ from 0 to 2000 PPM. Its VOC output is correlated to 0-2000 ppm CO₂ equivalent. Unlike temperature-equipped CDTV variants, this model has no temperature output.
For CO₂ measurement, the transmitter uses a single-beam dual-wavelength NDIR sensor designed for use in spaces occupied 24 hours a day. VOC measurement is handled by a MEMS metal oxide semiconductor sensor.
Combining CO₂ and VOC sensing in one transmitter can reduce the need for separate devices, wiring, and installation work. The transmitter provides jumper-selectable universal current and voltage outputs, allowing integration with building automation and ventilation control systems.
The integral LCD display provides local readings directly at the transmitter.
Need the same transmitter without the display? The CDTV-2N404 is the corresponding version without the integral LCD.
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
- Integral LCD for local readings
- No temperature output
- Wall-mount North American housing
- 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-LCD is suited for building automation, HVAC, ventilation, and facility-management applications where both CO₂ and VOC information is required from a single wall-mounted transmitter.
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-LCD according to the installation requirements for its North American wall-mount housing.
- Connect the required power supply of 16-35 VDC or 19-28 VAC.
- Set the required current or voltage output using the jumper-selectable output configuration.
- Connect the CO₂ and VOC outputs to the building automation, ventilation, or control system.
- Verify the displayed readings and connected outputs 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-LCD 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-LCD measure temperature?
No. The CDTV-2N404-LCD has no temperature output.
What sensors does it 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?
CO₂ accuracy is specified as ±40 ppm + 3% of reading.
How fast does the transmitter respond?
The specified response time is approximately 2 minutes for a 99% CO₂ step change and 5 minutes for VOC.
Does the CDTV-2N404-LCD have a display?
Yes. It includes an integral LCD display for local readings.
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.
What is the difference between the CDTV-2N404-LCD and CDTV-2N404?
The CDTV-2N404-LCD includes an integral LCD display, while the CDTV-2N404 is the version without the integral LCD.
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-LCD VOC & CO₂ transmitter, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
