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Series CDT Carbon Dioxide/Temperature Transmitter

Brand: Dwyer Instruments, LLC
Does not ship to United States
The Series CDT Carbon Dioxide and Temperature Transmitters accurately monitor the CO2 concentration and temperature in indoor environments to help achieve energy savings.

For increased sensor accuracy, a single beam dual wavelength nondispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied* and unoccupied buildings against light source aging effects.

The single beam dual wavelength sensor technology provides the highest level of accuracy compared to Automatic Baseline Correction methods which can unintentionally shift the calibration based on CO2 levels and barometric pressure conditions.

In order to achieve a higher level of accuracy, the Series CDT includes digital barometric pressure adjustment and the ability to field-calibrate the sensor.

For applications that require visual indication, the wall mount configurations of the Series CDT can be ordered with an integral LCD display.

Push buttons are standard on all configurations of the transmitters for access to the menu structure, but wall mount configurations can be ordered without the buttons. To prevent tampering, the action of the buttons can be locked out using an internal dip switch selection.
Features
  • Single beam dual wavelength NDIR sensor eliminates draft due to light source aging
  • Integral passive temperature outputs reduce number of devices mounted in the space
  • Service display tool available for models without an integral LED
  • Optional Integral Display and Relay Output
show more
The Series CDT Carbon Dioxide and Temperature Transmitters accurately monitor the CO2 concentration and temperature in indoor environments to help achieve energy savings.

For increased sensor accuracy, a single beam dual wavelength nondispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied* and unoccupied buildings against light source aging effects.

The single beam dual wavelength sensor technology provides the highest level of accuracy compared to Automatic Baseline Correction methods which can unintentionally shift the calibration based on CO2 levels and barometric pressure conditions.

In order to achieve a higher level of accuracy, the Series CDT includes digital barometric pressure adjustment and the ability to field-calibrate the sensor.

For applications that require visual indication, the wall mount configurations of the Series CDT can be ordered with an integral LCD display.

Push buttons are standard on all configurations of the transmitters for access to the menu structure, but wall mount configurations can be ordered without the buttons. To prevent tampering, the action of the buttons can be locked out using an internal dip switch selection.
Features
  • Single beam dual wavelength NDIR sensor eliminates draft due to light source aging
  • Integral passive temperature outputs reduce number of devices mounted in the space
  • Service display tool available for models without an integral LED
  • Optional Integral Display and Relay Output

Specifications

Accuracy

  • ± 1° C (± 1.8° F) at 25° C
  • ± 2 % - RH
  • ± 40 ppm ± 3 % of Reading - CO₂

Approvals & Certifications

  • FC Factory Calibration Certificate
  • LEED

Approvals & Certifications

  • CE

Consumption

  • 2 W - Average
  • 3.75 W - Peak

Flow Rate

  • 0 to 2000 ppm
  • 0 to 4000 fpm (0 to 20.32 mps)
  • 0 to 5000 ppm

Humidity

  • 10 to 95 % Relative Humidity, Non-Condensing

Mounting

  • Duct Mount
  • Wall Mounted

Output

  • 0-10 Vdc
  • 0-5 Vdc
  • 2 A at 30 Vdc - SPST Relay:
  • 4-20 mA (Max. 500 ohms)
  • SPST Normally Open, 2 A at 30 Vdc

Power Requirement

  • 16-35 Vdc
  • 19-28 Vac

Response Time

  • 2 minutes for 99 % Step Change

Sensor / Probe Type

  • RTD
  • Thermistor

Switch Type

  • SPST - Relay

Temperature Range

  • 0° to 50° C (32° to 122° F)

Typical Applications

  • Demand control ventilation in schools, office buildings, hospitals, and other indoor environments
  • LEED® certification