SparkFun Photoacoustic Spectroscopy CO2 Sensor - PASCO2V01 (Qwiic)

• SparkFun Photoacoustic Spectroscopy CO2 Sensor - PASCO2V01 (Qwiic)
• Incorporates advanced photoacoustic spectroscopy
• Delivers accurate CO2 measurement: 0-32,000ppm
• Features direct ppm readouts via I2C, UART, PWM
• Integrates compact 1in x 1.6in board design
• Offers configurable interrupt pin functionality

The SparkFun Photoacoustic Spectroscopy CO2 Sensor - PASCO2V01 (Qwiic) incorporates the XENSIV? PAS CO2 sensor package from Infineon?, designed to deliver precise CO2 measurements in parts-per-million (ppm) format. Utilizing a photoacoustic spectroscopy measurement system, it combines narrow-band filtered infrared light with a sensitive microphone within the sensing cavity to accurately detect CO2 concentrations ranging from 0 to 32,000ppm. The sensor achieves optimal accuracy of (30ppm + 3%) when readings are between 400ppm and 5,000ppm.

This sensor features an integrated microcontroller that facilitates direct ppm readouts through three communication interfaces: I2C, UART, and PWM. The device requires a 12V supply for the infrared emitter, with an AP3012 boost regulator included to convert 3.3V from a Qwiic connection to a clean 12V output. The compact board, measuring 1 inch by 1.6 inches, routes the I2C bus to dual Qwiic connectors and provides access to all sensor pins via 0.1-inch spaced headers.

The interrupt pin offers unique functionalities, including alarm thresholds, data readiness, and sensor busy statuses, and can be configured for early measurement start notifications. A week-long calibration period is necessary, with measurements taken every 10 seconds and requiring at least 30 minutes of outdoor exposure.

 WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov