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Monday, 27-Aug-2012 10:19 Email | Share | | Bookmark
H2S Analyzers

The primary detection technology of H2S Analyzers by ANALYTICAL SYSTEMS INTERNATIONAL has three advantages based on the chemistry and physics involved."No interference" is proven by years of experience with various applications where no other chemical reaction with lead acetate has been found to darken the sensing tape except H2S. This ensures that only a sulfur-specific reaction will occur. "Linear response “indicates that the rate of tape darkening is linear with respect to the H2S concentration. The benefit of this response is the straight forward relationship between the measured variable and quantity units. Equipment maintenance is easier and only a single point calibration is required. "Parts per billion sensitivity" relates to measurements that can be made even when the H2S concentration is only one one-billionth of the total volume. This accuracy benefits the user in determining acceptable levels that can be monitored.
This detection technology is applied to a range of product applications. Mathematical formulations and field-proven results demonstrate the calculation precision that is available.
It is important to note that a variety of fundamentally different implementations have been applied to lead acetate chemistry over the years. These fundamental selections of sample handling, optical coupling, signal detection, and information processing each have major impact on the system performance. The following descriptions outline some of the parameters implemented by ANALYTICAL SYSTEMS INTERNATIONAL to achieve superior performance and easy operation.
• Sample flow is tangent to ASI Tape to eliminate effects from porosity variations when sample is passed through the substrate
• Signal generation is based on H2S concentration only, therefore sample volumetric flow rate does not affect accuracy
• Calibration options allow flexibility to match available resources with application requirements
• Spectral correlation of the optical path for optimum impedance matching has been designed into the system.
• Conversion resolution of the signal is more than 100 times greater than with previously available technology.
• ANALYTICAL SYSTEMS INTERNATIONAL information processing algorithms completely eliminate the effects of parameter offsets commonly referred to as drift.
• Signal over sampling algorithms are implemented for statistical detection processing and accuracy correlation
• Full floating point precision is used to execute all information processing algorithms
• Function keys and local display provide easy operation selection and direct result display
• Diagnostic program execution and status alarms contribute to reliable on-line operation
• Plain language displays with descriptions of operation status support easy operation


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