Total sulfur analyzer
max. 20 000 ppb | Model 108E Teledyne Advanced Pollution Instrumentation

The TAPI Model 108E is designed to measure mixed sulfur impurities, collectively referred to as Total Sulfides (TS), in air or carbon dioxide (CO2) gas. Since there is no SO2 scrubber in the system, the instrument reading is the sum of the oxidized sulfur compounds and SO2.

The Model 108E consists of a modified M100E UV Fluorescence SO2 Analyzer, with special software and a M501TS high temperature thermal oxidizer. Sulfur compounds are heated as they pass through the converter and are oxidized into SO2.

When analyzing CO2, which generally contains no oxygen, there is an assembly to add air, giving approximately 6% oxygen to the sample before it passes through the converter. This dilution of the sample gas is corrected in the calibration procedure. The added oxygen allows the sulfur compounds to be oxidized to SO2 making the M108E respond to the total number of sulfur molecules in the sample gas. SO2 is unaffected by the converter.