SparkFun Photoacoustic Spectroscopy CO2 Sensor - PASCO2V01 (Qwiic)
The SparkFun Photoacoustic Spectroscopy CO2 Sensor features the Infineon XENSIV PAS CO2 (PASCO2V01) sensor, which delivers highly accurate CO2 measurements in direct parts-per-million (ppm) format. The photoacoustic spectroscopy system combines narrow-band filtered IR light with a sensitive microphone inside the sensing cavity, measuring CO2 concentrations from 0 to 32,000 ppm with a best accuracy of ±(30 ppm + 3%) between 400 ppm and 5,000 ppm.
The sensor communicates over I2C, UART, or PWM, with an integrated microcontroller that converts raw data into direct ppm readings. The board includes an AP3012 boost regulator providing a clean 12 V supply for the IR emitter from a 3.3 V Qwiic connection. All sensor pins are broken out to 2.54 mm spaced headers for flexible wiring options.
Key Features
- Photoacoustic Spectroscopy – High-accuracy CO2 sensing with integrated microcontroller for direct ppm output
- Three Communication Interfaces – I2C (default, address 0x28), UART, and PWM
- Wide Measurement Range – 0–32,000 ppm CO2
- High Accuracy – ±(30 ppm + 3% of reading) between 400 ppm and 5,000 ppm
- Three Operating Modes – Idle, continuous, and single-shot
- Qwiic Connectors – Two Qwiic connectors for daisy-chaining I2C devices
- On-Board 12 V Boost Regulator – AP3012 with decoupling capacitors, powered from 3.3 V
- Configurable Interrupt Pin – Alarm thresholds, data ready, sensor busy, and early measurement start notification
- Power-Saving Option – Interrupt and boost enable pins on adjacent headers for easy power management during measurements
Specifications
- Sensor – Infineon XENSIV PASCO2V01
- CO2 Range – 0–32,000 ppm
- Accuracy – ±(30 ppm + 3%) at 400–5,000 ppm
- VDD3.3 – 3.0–3.6 V (3.3 V typical)
- VDD12 – 10.8–13.2 V (12 V typical)
- Operating Temperature – 0–50 °C
- Operating Humidity – 0–85% RH
- I2C Address – 0x28
- Board Dimensions – Approximately 25.4 × 40.6 mm
Ideal For
- Indoor air quality monitoring
- HVAC and ventilation control systems
- Environmental and greenhouse monitoring
- Smart building and IoT applications
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Description
The SparkFun Photoacoustic Spectroscopy CO2 Sensor features the Infineon XENSIV PAS CO2 (PASCO2V01) sensor, which delivers highly accurate CO2 measurements in direct parts-per-million (ppm) format. The photoacoustic spectroscopy system combines narrow-band filtered IR light with a sensitive microphone inside the sensing cavity, measuring CO2 concentrations from 0 to 32,000 ppm with a best accuracy of ±(30 ppm + 3%) between 400 ppm and 5,000 ppm.
The sensor communicates over I2C, UART, or PWM, with an integrated microcontroller that converts raw data into direct ppm readings. The board includes an AP3012 boost regulator providing a clean 12 V supply for the IR emitter from a 3.3 V Qwiic connection. All sensor pins are broken out to 2.54 mm spaced headers for flexible wiring options.
Key Features
- Photoacoustic Spectroscopy – High-accuracy CO2 sensing with integrated microcontroller for direct ppm output
- Three Communication Interfaces – I2C (default, address 0x28), UART, and PWM
- Wide Measurement Range – 0–32,000 ppm CO2
- High Accuracy – ±(30 ppm + 3% of reading) between 400 ppm and 5,000 ppm
- Three Operating Modes – Idle, continuous, and single-shot
- Qwiic Connectors – Two Qwiic connectors for daisy-chaining I2C devices
- On-Board 12 V Boost Regulator – AP3012 with decoupling capacitors, powered from 3.3 V
- Configurable Interrupt Pin – Alarm thresholds, data ready, sensor busy, and early measurement start notification
- Power-Saving Option – Interrupt and boost enable pins on adjacent headers for easy power management during measurements
Specifications
- Sensor – Infineon XENSIV PASCO2V01
- CO2 Range – 0–32,000 ppm
- Accuracy – ±(30 ppm + 3%) at 400–5,000 ppm
- VDD3.3 – 3.0–3.6 V (3.3 V typical)
- VDD12 – 10.8–13.2 V (12 V typical)
- Operating Temperature – 0–50 °C
- Operating Humidity – 0–85% RH
- I2C Address – 0x28
- Board Dimensions – Approximately 25.4 × 40.6 mm
Ideal For
- Indoor air quality monitoring
- HVAC and ventilation control systems
- Environmental and greenhouse monitoring
- Smart building and IoT applications
