Pmod AQS: Digital Gas Sensor for Air Quality

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The Pmod AQS is a digital gas sensor for monitoring indoor air quality at low power. With the AMS CCS811, you can detect a wide range of Volatile Organic Compounds (VOCs) using the micro-hotplate technology, enabling a highly reliable solution for gas sensors with very fast cycle times.

  • Optimized low-power modes
  • Integrated MCU with ADC
  • The Total Volatile Organic Compound (TVOC) output range is from 0ppb to 1187ppb
  • 10-bit measurement resolution
  • 6-pin Pmod connector with I²C interface
  • Pass-through Pmod host port for daisy chaining
  • Product Compliance: 
    • HTC: 847330118
    • ECCN: EAR99
  • Pmod AQS
  • Custom anti-static Pmod packaging

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  • 1
    Baseline correction too often

    Posted by Nathan Schattke on 3rd Jun 2021

    The data sheet says it should baseline correct every 24 hrs max but that the firmware can rewrite. Digilent seems to have adjusted the firmware. I got over 500 baseline values over a 59 hr period. The physical structure is very hard to build a gas flow path around. It does respond quickly to foul odors.