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Ambient Sulphur Dioxide Monitor

Ambient Sulphur Dioxide Monitor

Ambient Sulfur Dioxide Monitor

The APSA-370 is a device for the continuous monitoring of atmospheric SO2 using UV fluorescence. The APSA-370 employs an proprietary, internal dry-method sampling device to achieve the highest levels of sensitivity and accuracy. The dry-method, due to its minimal maintenance requirements capability of continuous monitoring and instantaneous analysis of gas in its unaltered state, has been a preferred method for monitoring the atmospheric pollution.


  • UV-fluorescent detector resistant to moisture interference; Low range: 0-0.05 ppm F.S.
  • Alternately to FDP measurements, the detector design is highly SO2 selective and requires no supplemental gas.
  • An integral HC-cutter with a selective membrane eliminates interfering components.
  • Incorporates a lamp intensity compensator.
  • Uses a built-in inert PTFE sample inlet filter.

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