Dwyer Instruments CDTR-2N4F4-LCD | Carbon Dioxide/Temperature/Humidity | Wall Mount | Universal current/voltage output | 20 kO Thermistor Temperature Output | North American Housing | LCD Display
The Dwyer Instruments CDTR-2N4F4-LCD is a wall-mounted carbon dioxide, relative humidity, and temperature transmitter designed to combine multiple environmental measurements in a single device. It provides a 0-2000 PPM CO₂ range, a 20 kΩ thermistor temperature output, universal analog outputs, and a configurable integral LCD display.
The North American housing configuration is suitable for HVAC, building management, demand-controlled ventilation, and retrofit applications where CO₂, humidity, and temperature monitoring are required.
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Part Number: CDTR-2N4F4-LCD
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Product Overview
The Dwyer CDTR-2N4F4-LCD is part of the Series CDTR Carbon Dioxide, Relative Humidity and Temperature Transmitters, designed to reduce the number of individual sensors required for wall or duct installations.
This model provides a 0-2000 PPM CO₂ measurement range using a single-beam dual-wavelength NDIR sensor. The sensor automatically corrects the CO₂ measurement against light-source aging effects, helping maintain reliable measurement performance over time.
The transmitter also incorporates digital barometric pressure adjustment and field calibration, allowing the device to be configured and calibrated for installation conditions.
For system integration, the CDTR-2N4F4-LCD provides universal 4-20 mA, 0-5 VDC, or 0-10 VDC outputs for CO₂ and relative humidity. This makes it suitable for connection to a wide range of building management controllers and HVAC control systems.
A key feature of this model is its integral configurable LCD display. The display can be configured to show temperature only, relative humidity only, CO₂ only, CO₂ and humidity, or CO₂ and temperature, providing local visibility of environmental conditions without requiring a separate display device.
The temperature measurement is provided through a 20 kΩ thermistor output, allowing the temperature signal to be integrated into compatible control systems.
Key Benefits
- Measures CO₂, relative humidity, and temperature in one device
- 0-2000 PPM CO₂ measurement range
- Single-beam dual-wavelength NDIR sensor
- 20 kΩ thermistor temperature output
- Universal 4-20 mA, 0-5 VDC, or 0-10 VDC outputs for CO₂ and RH
- Digital barometric pressure adjustment
- Field-calibration capability
- Configurable integral LCD display
- Wall-mount North American housing
- Suitable for HVAC, BMS, and demand-controlled ventilation applications
- Helps reduce the number of separate environmental sensors required
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
The Dwyer CDTR-2N4F4-LCD is suited for:
- HVAC demand-controlled ventilation systems
- Building management system (BMS) projects
- Commercial and industrial indoor environments
- Wall-mounted CO₂, humidity, and temperature monitoring
- Retrofit projects requiring multiple measurements from one device
- Applications requiring universal analog outputs
- Facilities needing a local LCD display alongside controller integration
How to Specify & Commission It
- Mount the CDTR-2N4F4-LCD on the wall according to the installation requirements for the North American housing.
- Connect the required power and output wiring.
- Select the appropriate 4-20 mA, 0-5 VDC, or 0-10 VDC output configuration for CO₂ and RH.
- Set the required barometric pressure value and perform field calibration if necessary.
- Configure the integral LCD to display the required combination of temperature, RH, and CO₂.
- Verify the CO₂, relative humidity, and temperature readings at the connected controller.
Frequently Asked Questions
What does the Dwyer CDTR-2N4F4-LCD measure?
It measures carbon dioxide, relative humidity, and temperature. The CO₂ range is 0-2000 PPM, and temperature is provided through a 20 kΩ thermistor output.
What type of CO₂ sensor does it use?
The transmitter uses a single-beam dual-wavelength NDIR sensor that automatically corrects for light-source aging effects.
What outputs are available?
Universal 4-20 mA, 0-5 VDC, or 0-10 VDC outputs are available for CO₂ and relative humidity.
What temperature output does the CDTR-2N4F4-LCD provide?
The model uses a 20 kΩ thermistor temperature output.
Does the CDTR-2N4F4-LCD have a display?
Yes. It includes an integral configurable LCD display.
What can the LCD display show?
The LCD can be configured to display temperature only, RH only, CO₂ only, CO₂ and humidity, or CO₂ and temperature.
Can the transmitter be calibrated in the field?
Yes. The CDTR-2N4F4-LCD provides digital barometric pressure adjustment and field calibration.
Where can the CDTR-2N4F4-LCD be used?
It is suitable for HVAC demand-controlled ventilation, BMS installations, commercial and industrial indoor environments, and retrofit applications requiring CO₂, humidity, and temperature monitoring.
Is genuine stock available with UAE shipping?
Yes. Genuine Dwyer Instruments stock with free UAE-wide shipping is available. Call +971 6 5436933 for pricing and current availability.
Request a Quote Today
For pricing, availability, or technical assistance with the Dwyer CDTR-2N4F4-LCD CO₂/RH/Temperature Transmitter, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
