Dwyer Instruments CDT-2D40 | Carbon Dioxide Transmitter | Duct mount | 2000 ppm CO2 range | 4 to 20 mA / 0 to (5 or 10) VDC CO2 output
The Dwyer CDT-2D40 is a duct-mount carbon dioxide transmitter with a 0-2000 ppm CO₂ range and universal 4-20 mA, 0-5 VDC or 0-10 VDC output. This model is dedicated to CO₂ measurement and does not provide a temperature output, making it suitable for indoor air monitoring, demand-controlled ventilation and HVAC applications. 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-2D40
Product Overview
The Dwyer Instruments Series CDT Carbon Dioxide Transmitters accurately monitor CO₂ concentration in indoor environments to support ventilation control and energy-saving applications. The CDT-2D40 is a duct-mount model with a 0-2000 ppm CO₂ range and no 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
- Dedicated 0-2000 ppm CO₂ measurement
- Single-beam, dual-wavelength NDIR sensor with 15-year life expectancy
- Universal CO₂ output: 4-20 mA, 0-5 VDC or 0-10 VDC
- No temperature output for applications requiring dedicated CO₂ monitoring
- 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 dedicated duct-mounted CO₂ 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
- Applications where temperature measurement is not required
- 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 without a temperature output.
- Mount the CDT-2D40 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.
- Verify the CO₂ reading at the connected controller before placing the system into service.
Frequently Asked Questions
What does the CDT-2D40 measure?
It measures CO₂ from 0-2000 ppm only. This model does not provide a temperature 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-2D40?
CO₂ accuracy is ±40 ppm + 3% of reading at 2000 ppm.
What sensor technology is used?
The CDT-2D40 uses a single-beam, dual-wavelength NDIR sensor with a 15-year life expectancy.
Does the transmitter provide temperature measurement?
No. The CDT-2D40 is a dedicated CO₂ transmitter with no temperature output.
Is the CDT-2D40 wall or duct mounted?
The CDT-2D40 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-2D40 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
