Analytical Technology

A15/81 system
The conventional method for measuring sulfide concentrations in water is to use analyzers that employ selective ion electrodes (SIE) for sensing. While providing adequate sensitivity, poor-quality samples make fouling of the analytical system a major concern. The A15/81 system overcomes this problem by employing a polagraphic H2S gas sensor that never comes into contact with the sample; only the gas stream containing the stripped H2S reaches the sensor. The device provides extremely high measurement sensitivity down to low parts-per-billion levels.