Dwyer Instruments CDT-2N4E | Carbon Dioxide/Temperature | Wall Mount | Universal current/voltage output | Pt1000 RTD Temperature Output | North American Housing
The Dwyer CDT-2N4E is a wall-mount carbon dioxide and temperature transmitter designed for indoor environmental monitoring. It measures CO₂ from 0 to 2000 PPM and provides a Pt1000 Ω RTD temperature output, with a universal CO₂ output selectable between 4–20 mA, 0–5 VDC, and 0–10 VDC.
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Part Number: CDT-2N4E
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Product Overview
The Dwyer CDT-2N4E combines CO₂ and temperature measurement in a single wall-mounted transmitter, helping building and HVAC systems monitor indoor air conditions while reducing the number of devices required in occupied spaces.
The transmitter measures CO₂ concentrations from 0 to 2000 PPM and uses a Pt1000 Ω RTD for temperature measurement across 32 to 122°F (0 to 50°C). Its universal CO₂ output can be configured for 4–20 mA, 0–5 VDC, or 0–10 VDC, allowing integration with a wide range of building automation and HVAC control systems.
A single-beam, dual-wavelength NDIR sensor provides CO₂ measurement with a stated 15-year life expectancy. The sensor automatically corrects measurement against light-source aging effects, while digital barometric pressure adjustment and field calibration capability support accurate operation over time.
The CDT-2N4E features a North American wall-mount housing with an IP20 enclosure rating. Push buttons provide access to the transmitter's menu structure, while an internal DIP switch can lock the controls to help prevent unwanted changes. A backplate electrical connection simplifies installation.
With CO₂ and temperature measurement combined in one device, the CDT-2N4E is suited to applications such as demand-controlled ventilation, schools, offices, hospitals, and LEED-driven ventilation monitoring.
For applications requiring local visual indication, the CDT-2N4E-LCD provides the same transmitter configuration with an integral LCD display.
Key Benefits
- Measures CO₂ from 0 to 2000 PPM
- Combines CO₂ and temperature measurement in one wall-mount transmitter
- Pt1000 Ω RTD temperature output
- Universal CO₂ output: 4–20 mA, 0–5 VDC, or 0–10 VDC
- Single-beam, dual-wavelength NDIR CO₂ sensor
- 15-year sensor light-source life expectancy
- Digital barometric pressure adjustment and field calibration capability
- Lockable push-button menu access
- North American wall-mount housing
- Backplate electrical connection for installation
- IP20 enclosure rating
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
The Dwyer CDT-2N4E is suitable for:
- HVAC and building automation systems requiring CO₂ monitoring
- Demand-controlled ventilation in schools, offices, and hospitals
- Projects requiring CO₂ and temperature measurement from a single wall-mounted device
- LEED-driven ventilation monitoring
- Building operators monitoring indoor environmental conditions
- Control systems requiring a selectable 4–20 mA, 0–5 VDC, or 0–10 VDC CO₂ signal
How to Specify & Commission It
- Mount the CDT-2N4E wall housing and use the backplate electrical connection.
- Connect the required power supply of 16–35 VDC or 19–28 VAC.
- Select the required CO₂ output: 4–20 mA, 0–5 VDC, or 0–10 VDC.
- Set the barometric pressure and perform field calibration if required for the installation.
- Verify the CO₂ and temperature readings at the connected controller or building automation system.
- Lock the push-button menu through the internal DIP switch when access protection is required.
Frequently Asked Questions
What does the Dwyer CDT-2N4E measure?
The CDT-2N4E measures CO₂ from 0 to 2000 PPM and temperature using a Pt1000 Ω RTD temperature output.
What CO₂ outputs are available?
The transmitter provides a universal CO₂ output selectable as 4–20 mA, 0–5 VDC, or 0–10 VDC.
What is the temperature range?
The temperature measurement range is 32 to 122°F (0 to 50°C).
How accurate is the CDT-2N4E?
CO₂ accuracy is ±40 ppm + 3% of reading, while temperature accuracy is ±1°C at 25°C.
What sensor technology does the CDT-2N4E use?
It uses a single-beam, dual-wavelength NDIR sensor with a stated 15-year life expectancy. The transmitter also provides digital barometric pressure adjustment and field calibration capability.
Does the CDT-2N4E have an integral display?
No. The CDT-2N4E does not have an integral LCD display. The CDT-2N4E-LCD is the corresponding configuration with an integral LCD.
Does the CDT-2N4E have a relay output?
No. The CDT-2N4E does not include a relay output.
What power supply does the CDT-2N4E require?
It operates from 16–35 VDC or 19–28 VAC and has an average power consumption of 2 W.
Where can the CDT-2N4E be used?
It is suitable for indoor applications including demand-controlled ventilation, schools, offices, hospitals, and LEED-driven ventilation monitoring.
Is genuine Dwyer stock available with UAE shipping?
Yes. General Tech Services LLC supplies genuine Dwyer Instruments products with free UAE-wide shipping. Call +971 6 5436933 for pricing and current availability.
Request a Quote Today
For pricing, availability, or technical assistance with the Dwyer CDT-2N4E CO₂/temperature transmitter, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
