Dwyer CDT-2D40 Duct Mount Carbon Dioxide Transmitter

Product Id : 157753


Dwyer CDT-2D40 Duct Mount Carbon Dioxide Transmitter accurately monitors the CO2 concentration in indoor environments to help achieve energy savings. For increasing 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.
Application: Demand control ventilation in schools, office buildings, hospitals, and other indoor environments

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Country : United States

Product Description

Dwyer CDT-2D40 Duct Mount Carbon Dioxide Transmitter is  Single-beam dual-wavelength sensor technology provides the user the highest level of accuracy when compared to Automatic Baseline Correction methods which can unintentionally shift the calibration based on CO2 levels and barometric pressure condition. In order to achieve a higher level of accuracy, the CDT includes digital barometric pressure adjustment and the ability to field-calibrate the sensor. The Push buttons are standard on all configurations of the transmitters.

Features of Dwyer CDT-2D40 Duct Mount Carbon Dioxide Transmitter : 

  • Single beam dual-wavelength NDIR sensor eliminates draft due to light source aging
  • Integral passive temperature outputs reduce the number of devices mounted in the space
  • Service display tool available for models without an integral LED
  • Optional integral display and relay output

Additional Information

Weight 1 kg
Manufacturer Dwyer
Model No CDT-2D40
Product Series CDT Series
CO2 Measuring Range 0 to 2000 or 0 to 5000 ppm
Accuracy ±40 ppm
Temperature Range 0 to 50°C
Accuracy_1 ±1°C @ 25°C
Sensors Single beam, dual wavelength NDIR
Temperature Dependance ±8 ppm/°C at 1100 ppm.
Pressure dependency 0.13% of reading per mm of Hg
Non Linearity 16 ppm
Response Time 2 min for 99% step change.
Operating Temperature 0 to 50°C
Operating Humidity 10 to 95% RH (noncondensing)
Duct Air Velocity Range 0 to 4000 FPM (20.32 m/s).
Power Consumption Average: 2 w; Peak: 3.75 w.
Output Current: 4 to 20 mA (max. 500 Ω); Voltage: 0 to 5 VDC or 0 to 10 VDC (min. 500 Ω); Relay: SPST NO rated 2 A @ 30 VDC.
Power Requirements 16 to 35 VDC or 19 to 28 VAC
Dimension 4-25/32" x 11-49/64"
Weight 125 Grams

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