Diteco - Model DTC-HS34 - Hydrogen Sulphide (H2S) Analyser System - Datasheet

Measures H2S in continuous flowing and pressurized gaseous streams. Duty: To measure the concentration of H2S in a process gas stream. The principle of operation is as follows. A reel of paper tape impregnated with lead acetate is exposed to the gaseous process sample in the sample chamber. Hydrogen sulphide (H2S) in the process sample reacts with the lead acetate, after acidification, to form lead sulphide (PbS), a brown compound that stains the tape. The higher the concentration of H2S the darker the stain. A focused LED and single photo detector system continuously measures the darkening stain and the analyser reports this as a 4-20mA output of the concentration of H2S.