Dwyer Instruments CDT-2D4D | Carbon Dioxide Transmitter | Duct mount | 2000 ppm | CO2 transmitter with current/voltage CO2 outputs and PT100 Ohm RTD temperature output
The Dwyer CDT-2D4D is a duct-mount carbon dioxide and temperature transmitter with a 0-2000 ppm CO₂ range, universal 4-20 mA, 0-5 VDC or 0-10 VDC CO₂ output and a Pt100 Ω RTD temperature output. It is designed for indoor air monitoring, demand-controlled ventilation and HVAC applications requiring duct-mounted CO₂ and temperature measurement. Genuine stock at General Tech Services LLC, UAE, with free UAE-wide shipping. Request a quote in under a minute - call +971 6 5436933.
Part No. CDT-2D4D
Product Overview
The Dwyer Instruments Series CDT Carbon Dioxide Transmitters accurately monitor CO₂ concentration and temperature in indoor environments to support ventilation control and energy-saving applications. The CDT-2D4D is a duct-mount model with a 0-2000 ppm CO₂ range and a Pt100 Ω RTD temperature output.
A single-beam, dual-wavelength NDIR sensor automatically compensates for light-source aging effects in occupied and unoccupied buildings. The transmitter also provides digital barometric pressure adjustment and field calibration capability.
The CO₂ output is universal and can be configured for 4-20 mA, 0-5 VDC or 0-10 VDC to match the connected controller. Its NEMA 4X (IP66) housing is suitable for duct applications with air velocities up to 4000 FPM (20.32 m/s), while the backplate electrical connection simplifies installation.
Key Benefits
- 0-2000 ppm CO₂ measurement with Pt100 Ω RTD temperature output
- Single-beam, dual-wavelength NDIR sensor with 15-year life expectancy
- Universal CO₂ output: 4-20 mA, 0-5 VDC or 0-10 VDC
- CO₂ and temperature measurement in one transmitter
- NEMA 4X (IP66) duct-mount housing
- Suitable for duct air velocities up to 4000 FPM (20.32 m/s)
- Digital barometric pressure adjustment
- Field calibration capability
- Backplate electrical connection
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
- HVAC systems requiring duct-mounted CO₂ and temperature monitoring
- Demand-controlled ventilation in schools, offices and hospitals
- Building automation and ventilation control systems
- Projects requiring a universal 4-20 mA, 0-5 VDC or 0-10 VDC CO₂ output
- Installations requiring a Pt100 Ω RTD temperature output
- LEED-driven ventilation monitoring applications
- Duct systems requiring a rugged NEMA 4X (IP66) transmitter housing
How to Specify & Commission It
- Confirm the application requires a 0-2000 ppm duct-mounted CO₂ transmitter with a Pt100 Ω RTD temperature output.
- Mount the CDT-2D4D in the duct according to the installation manual and verify the duct air velocity is within the 4000 FPM (20.32 m/s) limit.
- Wire the power supply and select the required CO₂ output: 4-20 mA, 0-5 VDC or 0-10 VDC.
- Set the digital barometric pressure adjustment and perform field calibration if required.
- Connect the Pt100 Ω RTD temperature output to the controller.
- Verify the CO₂ and temperature readings at the connected controller before placing the system into service.
Frequently Asked Questions
What does the CDT-2D4D measure?
It measures CO₂ from 0-2000 ppm and temperature through a Pt100 Ω RTD output.
What CO₂ outputs are available?
The transmitter provides a universal selectable output of 4-20 mA, 0-5 VDC or 0-10 VDC.
How accurate is the CDT-2D4D?
CO₂ accuracy is ±40 ppm + 3% of reading at 2000 ppm. Temperature accuracy is ±1°C at 25°C.
What sensor technology is used?
The CDT-2D4D uses a single-beam, dual-wavelength NDIR sensor with a 15-year life expectancy.
Is the CDT-2D4D wall or duct mounted?
The CDT-2D4D is a duct-mount transmitter with a NEMA 4X (IP66) housing.
What is the maximum duct air velocity?
The transmitter is suitable for duct air velocities up to 4000 FPM (20.32 m/s).
Does it support field calibration?
Yes. The CDT-2D4D provides field calibration capability and digital barometric pressure adjustment.
Is genuine stock available with UAE shipping?
Yes. Genuine Dwyer Instruments stock is available from General Tech Services LLC, UAE, with free UAE-wide shipping. Call +971 6 5436933 for pricing and current availability.
Request a Quote Today
For pricing or to place an order, contact General Tech Services LLC.
Call +971 6 5436933 | www.generaltechshop.ae
