The EVAL-CN0338-ARDZ shield is a Non-Dispersive Infrared(NDIR) carbon dioxide detector reference design. Complete with thermopile sensor, lamp, and light tube, this design interfaces directly with the dual 24-bit sigma delta converters on the EVAL-ADICUP360.
The EVAL-CN0338-ARDZ shield is optimized for CO2 sensing, but can accurately measure the concentration of a large number of gases by using thermopiles with different optical filters.
EVAL-CN0338-ARDZ shield uses NDIR(Non-Dispersive Infrared) physical sensing technique, it does not chemically react with the target gas or give off any toxic by products when measuring the gas concentration. Stable after long period of storage. With two calibrate method (standard beer-lambert calibration and modified beer-lambert calibration) the measurement range can up to 0% ~ 100%. With the temperature composition algorithm in firmware, the CN0338 eliminated temperature drift from idea gas law.
The CN0338 firmware use P0.1 and P0.2 port of ADuCM360 as UART communicate port, for detailed description about how to connect P0.1 and P0.2 UART port to USER USB or DEBUG UBS, please reference EVAL-ADICUP360 Base Board Hardware
The following is the CN0338 shield board picture (not to scale):
The following is the CN0338 sensor board picture (not to scale):