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

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