Both analyzer 933 and rack mount package analyzer 933RM are a unique ultraviolet (UV) photometric analyzer system designed for the low-level measurement of hydrogen sulfide (H2S), carbonyl sulfide (COS), and methyl mercaptan (CH3SH) in natural gas applications. Capable of unattended operation for an extended time period, the 933 consists of a fully integrated analyzer and sample system. It provides a fast response time to increasing or decreasing H2S and other sulfur species concentrations. The 933 uses AMETEK’s proprietary frontal elution chromatography sampling technique, combined with the exceptionally high-resolution, multi-wavelength 900 Series UV optical bench. These combine to provide an accurate, interference-free measurement. With optional measurements also available for carbonyl sulfide (COS) and methyl mercaptan (CH3SH), the 933 is ideal for a range of applications in the hydrocarbon processing, natural gas, and petrochemical industries.