The industry standard for air quality sensors

Air monitoring

The industry standard for air quality sensors

10 Dec, 2025

Alphasense has everything you need! A product range specifically designed for environmental air quality instruments.

Alphasense's range of gas and particulate sensors is backed by over 25 years of design and manufacturing experience. These sensors are suitable for a variety of applications in both fixed and portable detection instruments.

Electrochemical sensors for PPB measurements

Environmental air quality gas sensors require PPB sensitivity over a wide range of environmental conditions. In 2011, Alphasense sensors were the first PPB electrochemical sensors and have become the industry standard.

Alphasense PPB sensors are optimised for outdoor applications providing:

  • Long life
  • Unmatched baseline stability
  • High sensitivity

Photoionisation detectors (PID) for VOC measurement

PIDs are considered the gold standard for total VOC measurement and will provide sensitivity down to PPB levels.

The new Alphasense PIDX sensors are designed for environmental air quality applications:

  • Unmatched sensor-to-sensor repeatability
  • Stability over varying environmental conditions
  • PPB sensitivity

Optical particle counters (OPC) for PM1, PM2.5, PM4.25 and PM10

Particulate concentration is one of the most widely measured indicators of air quality. Optical particle counters (OPC) are the most widely used technique for PM measurements.

The Alphasense line of OPCs provides an accurate reading across all size ranges: PM1.0, PM2.5, PM4.25 and PM10.

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