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Sensirion - SGP40

General Description

The Sensirion SGP40 sensor provides real-time measurements of volatile organic compounds (VOC). The sensor also provides temperature and relative humidity measurements. The SGP40 sensors are metal oxide (MOx) based sensors intended for indoor air quality applications. The sensors output VOC index values that can be converted to VOC concentrations in ppb using vendor-provided algorithms based on known laboratory conditions using ethanol as a test gas.  

Principle of Operation

The Sensirion SGP40 sensor uses a metal oxide gas sensor to detect VOC. The sensor is equipped with a temperature-controlled micro hotplate to provide a humidity-compensated VOC signal that is converted to a VOC index using Sensirion’s Gas Index Algorithm.


  • Dimensions: 39 x 15 x 5.5 mm, L x W x H (as-tested on the SEK-SVM4x Development Board); 2.44 x 2.44 x 0.85 mm, L x W x H (sensor only)
  • Weight: N/A
  • Battery: No
  • Power supply: No
  • Sensor lifetime: N/A
  • Clock function: No
  • Sampling mechanism: N/A
  • Environmental operating conditions: 0 – 90% RH; -10 – 50 °C
  • Internal data logging: No
  • Data communication/logging: USB, data can be visualized and retrieved using Sensirion Control Center Software
  • Weatherproof: No


  • Indoor air quality monitoring

Manufacturer's product webpage

    South Coast Air Quality Management District

    21865 Copley Dr, Diamond Bar, CA 91765



    © 2024 South Coast Air Quality Management District