top of page

CDWN/CDDN&CDWC Carbon Dioxide (CO2) Transmitter/Controller

Applications & Features

  • CD-N series carbon dioxide transmitters/controllers are designed for monitoring & controlling indoor air quality
  • CDWN/CDWC is suitable for wall mount and CDDN is suitable for duct mount
  • High performance NDIR digital sensor and circuit, ensure precise measurement and temperature compensation
  • Stable, reliable and fast response
  • 15 years sensor life without maintenance
  • Digital technology applied, over voltage and reverse polarity protection, high reliability and anti-interference capability
  • All electrical terminals are on the inside bottom, avoid any possible destroy to PCB when wiring (for CDWN/CDWC)
  • Multiple outputs selection
  • LCD & function keys can set various parameters, calibrate and adjust output, so the product can be a stand-alone controller (for CDWC)

Specifications for CDWN (wall mount) &CDDN (Duct)

  • Sensor: NDIR sensor, with ABC algorithm
  • Sampling Method: diffusion
  • Accuracy: see models
  • Response time: 120s (30cc/min, low airflow)
  • Drift: ±10ppm/year
  • Range: 0~2000ppm (Measurement range 400~2000 ppm)
  • Output: 4~20mA, 0~10V, RS485/Modbus
  • Load resistance: ≤500Ω (Current output),

≥2kΩ (Voltage output)

  • Power supply: 16~28VAC/16~35VDC
  • Display: Optional LCD (CDWN), with unit display
  • Display resolution: 1ppm
  • Working environment: 0~50°C , 0~85%RH (Non-cond.)
  • Temp. Compensation: CDWN0/CDDN0:10~40°C

CDWN1/CDDN1:0~50°C

  • Storage temperature: -20~60°C
  • Housing: ABS+PC (CDWN), fireproof ABS (CDDN)
  • Protection: IP30 (CDWN), IP65 (CDDN)
  • Weight: 135g (CDWN), 230g (CDDN)
  • Approval: CE
  • ABC algorithm:

Automatic Baseline Correction, it constantly keeps track of the sensor's lowest reading over a few days interval and slowly corrects for any long term drift detected as compared to the expected fresh air value of 400 ppm CO2.

Models for CDWN&CDDN

Model

CDWN

 

 

Wall mount CO2

Transmitter

Duct mount CO2

Transmitter

Accuracy

CDDN

 

 

50 ppm + 5% reading

40 ppm + 3% reading

Output

 

0

 

4~20mA & 0~10VDC

4~20mA & 0~10VDC RS485/Modbus

1

Display (CDWN

 

 

0

N/A

LCD

1

 

Specifications for CDWC

  • Sensor: NDIR sensor, with ABC algorithm
  • Sampling Method: diffusion
  • Accuracy: see models Temp.
  • Compensation: CDWC0:10~40°C; CDWC1:0~50°C
  • Response time: 120s (30cc/min, low airflow)
  • Drift: ±10ppm/year
  • Range: 0~2000 ppm (measure range 400~2000ppm)
  • Output: 2×SPST, 3A-30VDC/250VAC
  • Communication: optional RS485/Modbus
  • Power supply: 16~28VAC/16-35VDC
  • Display and keys: with LCD Display and 3 touch keys, see more details on LCD & Keys operation Display resolution: 1ppm
  • Working environment: 0~50°C , 0~85%RH (Non-cond.)
  • Storage temperature: -20~60°C
  • Housing: ABS+PC
  • Protection: IP30
  • Weight: 135g

Approval: CE Models for CDWC

Model

CDWC

 

 

Wall mount CO2 Controller

Accuracy

 

0

 

50 ppm + 5% reading

40 ppm + 3% reading

1

Communication

 

 

0

N/A

RS485/Modbus

1

 

Carbon Monoxide (CO) Transmitter

SKU: CDWN/CDDN&CDW
$1,000.00 Regular Price
$500.00Sale Price
Excluding GST