CDT SERIES

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EE CDS201 Room Sensor | \(CO_{2}\), Humidity & Temperature Transmitter

DWYER CDT SERIES  | NDIR CARBON DIOXIDE  & TEMPERATURE TRANSMITTER

The Dwyer Series CDT is a versatile carbon dioxide (\(CO_{2}\)) and temperature transmitter designed to accurately monitor indoor air quality while maximizing energy savings through demand-controlled ventilation. A high-accuracy wall or duct-mount transmitter that monitors \(CO_{2}\) concentration and temperature with universal outputs and an optional LCD.

  • Minimize inventory and save time by combining CO 2 and temperaturemeasurements into one transmitter
  • Requires minimal maintenance with Automatic Baseline Correction (ABC) to accountfor sensor drif
  • Reduce operation costs using a low energy, reliable, and repeatable CO 2 sensor
  • Simplify installation with backplate electrical connection
DWYER CDT SERIES  | NDIR CARBON DIOXIDE  & TEMPERATURE TRANSMITTER
The Series CDT utilizes single-beam, dual-wavelength Non-Dispersive Infrared (NDIR) technology to provide superior long-term stability and accuracy. Unlike sensors using Automatic Baseline Correction (ABC), the CDT’s dual-wavelength design automatically compensates for light source aging, making it suitable for both intermittently and continuously occupied buildings. It features digital barometric pressure adjustment and field-calibration capabilities to ensure precision in diverse environments.

PRODUCT USES:

  • Demand control ventilation (DCV) in schools, offices, and hospitals.
  • HVAC system optimization for LEED® certification.
    Indoor air quality monitoring in commercial buildings.
  • Energy management by regulating fresh air intake based on occupancy levels.

Technical Sheets

Instruction Manual

Catalog Page

Specifications

DWYER CDT SERIES  | NDIR CARBON DIOXIDE  & TEMPERATURE TRANSMITTER – KEY SPECIFICATIONS

  • 𝐶𝑂2 Range: 0 to 2,000 ppm or 0 to 5,000 ppm (model dependent).
  • Temperature Range: 32 to 122°F (0 to 50°C).
  • 𝐶𝑂2 Accuracy: ±40 ppm+3% of reading (at 2,000 ppm).
  • Outputs: Universal 4-20 mA, 0-5 VDC, or 0-10 VDC; optional SPST NO relay rated 2A @ 30 VDC.
  • Sensor Type: Single-beam, dual-wavelength NDIR (15-year life expectancy).
  • Power Requirements: 16-35 VDC or 19-28 VAC.
  • Enclosure Rating: Duct mount: NEMA 4X (IP66) for housing; Wall mount: IP20.

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