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Home / Articles and Press Releases / Press Release / VOC Sensors and How MiniPID 2 Works

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Press Release

VOC Sensors and How MiniPID 2 Works

By ION Science

| Read Bio

Published: May 20th, 2020

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There are 3 main VOC sensors that are used to detect VOCs, these include:

  1. Photoionisation detector (PID)
  2. Flame ionisation detector (FID)
  3. Metal oxide semi-conductor sensor (MOS)

ION Science manufactures MiniPID sensors to detect VOCs.

The MiniPID 2 is made up of 3 key components, the body, UV lamp, and the electrode stack.

When VOC gas enters the detection chamber, UV light (ultraviolet) energies the molecules, releasing negatively charged electrons. Therefore, the VOC molecule becomes positively charged.

The negatively charged electrons are attracted to the positive electrode and positively charged molecules are attracted to the negative electrode.

This results in a tiny electrical current that increases with gas concentration.

Many PID sensors give false readings in the presents of humidity as moisture creates a conductive path in the electrodes.

However, the MiniPID 2 uses patent fence electrode technology that blocks the conductive path, this practically eliminates the issue.

The MiniPID 2 also has an anti-contamination filter, this blocks airborne particles entering the detection chamber.

It also helps retain tiny amounts of ozone generated in the chamber.

Ozone actively cleans the electrode stack ensuring optimum performance is maintained.

For more information on ION Science products for use within your industry, please visit their website here.

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ABOUT THE AUTHOR

ION Science

ION Science Ltd is a leading manufacturer of gas detection instrumentation within industrial applications. Our product portfolio ranges from our revolutionary photoionization detectors (PIDs) for volatile organic compounds (VOCs) with optimal performance in humid and dirty working environments, to IAQ monitors, gas leak detectors and mercury analysers, all distributed world wide.

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