Model 802
UV Fluorescence SO₂ Analyzer

Principle of Operation

A filtered UV light enters the fluorescence chamber and excites the SO₂ molecules of the sample gas. As the excited SO₂ molecules decay to lower energy states they emit UV light at a longer wavelength. The light emitted by the excited SO₂ molecules is detected by a photomultiplier (PMT) after passing through a black glass optical filter allowing light at 350nm to pass. According to Beer-Lambert Law, the intensity emitted UV light is proportional to concentration of SO₂. Therefore, the concentration of the SO₂ in the fluorescence chamber can be deducted from the emitted UV light detected by the PMT.

Features

● LCD touch screen

● Modular design

● Network oriented

● Auto light source control

● Auto alarm functions.

● Flexible calibration options

● Advanced digital processor