Dwyer Instruments CDT-2N40-LCD | Carbon Dioxide | Wall Mount | Universal current/voltage output | North American Housing | LCD Display
The Dwyer CDT-2N40-LCD is a wall-mount carbon dioxide transmitter with a North American housing, a 0-2000 ppm CO₂ range, universal 4-20 mA, 0-5 VDC or 0-10 VDC output and an integral LCD display. This model is dedicated to CO₂ measurement and does not provide a temperature output, making it suitable for indoor CO₂ monitoring, demand-controlled ventilation and building automation 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-2N40-LCD
Product Overview
The Dwyer Series CDT Carbon Dioxide Transmitters accurately monitor CO₂ concentration in indoor environments to support ventilation control and energy-saving strategies. The CDT-2N40-LCD is a wall-mount model with a North American housing, a 0-2000 ppm CO₂ range and no temperature output. An integral LCD display provides local indication of the measured CO₂ concentration.
A single-beam, dual-wavelength NDIR sensor automatically compensates for light-source aging effects in both occupied and unoccupied buildings. The transmitter provides digital barometric pressure adjustment and field calibration capability for accurate CO₂ measurement.
The CO₂ output is universal and can be selected as 4-20 mA, 0-5 VDC or 0-10 VDC to match the connected controller. Push buttons provide access to the menu structure, while an internal DIP switch can lock the menu to help prevent unwanted changes. Backplate electrical connections simplify installation.
The CDT-2N40 is the same transmitter configuration without the integral LCD display.
Key Benefits
- Dedicated CO₂ measurement from 0-2000 ppm.
- Single-beam, dual-wavelength NDIR sensor with a 15-year life expectancy.
- Universal CO₂ output selectable as 4-20 mA, 0-5 VDC or 0-10 VDC.
- Integral LCD display provides local CO₂ indication.
- Digital barometric pressure adjustment supports measurement compensation.
- Field calibration capability simplifies commissioning and maintenance.
- Lockable push-button menu access helps prevent unwanted configuration changes.
- Backplate electrical connection simplifies installation.
- CDT-2N40 is available as the non-LCD configuration.
- Genuine Dwyer stock with free UAE-wide shipping.
Who This Product Is Best For
- Schools, offices and hospitals using demand-controlled ventilation.
- Commercial HVAC and building automation projects requiring dedicated CO₂ monitoring.
- Projects specifying wall-mounted CO₂ sensing with universal analog outputs.
- LEED-oriented ventilation monitoring applications.
- HVAC control systems requiring selectable 4-20 mA, 0-5 VDC or 0-10 VDC CO₂ output.
- Installations requiring local CO₂ indication through an integral LCD.
- Applications where temperature measurement is not required.
How to Specify & Commission It
- Confirm the 0-2000 ppm CO₂ range, absence of temperature output and wall-mount North American housing are suitable for the application.
- Mount the transmitter according to the installation manual and selected indoor location.
- Wire the power supply and select the required 4-20 mA, 0-5 VDC or 0-10 VDC CO₂ output.
- Set the barometric pressure and perform field calibration if required.
- Configure the transmitter menu and lock it with the internal DIP switch if required.
- Verify the CO₂ reading at the connected controller and integral LCD.
Frequently Asked Questions
What does the CDT-2N40-LCD measure?
It measures CO₂ from 0-2000 ppm only. This model does not provide a temperature output.
What CO₂ outputs are available?
The CO₂ output is selectable between 4-20 mA, 0-5 VDC and 0-10 VDC.
How accurate is the CDT-2N40-LCD?
CO₂ accuracy is ±40 ppm + 3% of reading at 2000 ppm.
What sensor technology is used?
It uses a single-beam, dual-wavelength NDIR CO₂ sensor with a stated 15-year life expectancy.
Does the CDT-2N40-LCD have a display?
Yes. The CDT-2N40-LCD has an integral LCD display. The CDT-2N40 provides the same transmitter configuration without the integral LCD.
Is the CDT-2N40-LCD wall or duct mounted?
The CDT-2N40-LCD is a wall-mount model with a North American housing.
Can the sensor be field calibrated?
Yes. The transmitter provides field calibration capability and digital barometric pressure adjustment.
Is genuine stock available with UAE shipping?
Yes. Genuine Dwyer 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
