ABB’s Sensi+™ is a compact natural gas contaminants analyzer that utilizes Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technology.
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It offers fast, precise, and simultaneous measurement of corrosive substances like hydrogen sulfide (H₂S), carbon dioxide (CO₂), and water (H₂O) in complex natural gas streams.
The composition of natural gas streams varies based on their source well and processing stage. This variation can be short-term or long-term, and gas standards are typically methane-based, posing challenges for accurate measurements of contaminants.
Analytical instruments, including those based on Tunable Diode Laser (TDL) technology, face the common challenge of cross-interference.
Hydrocarbons in natural gas absorb laser light, impacting the measurement of contaminants. Some methods involve scrubbers, but they cannot track real-time changes in gas composition.
Sensi+ overcomes these challenges due to OA-ICOS's sensitivity, even with small absorption spectrum changes. Recent advancements in ABB's spectroscopic analysis algorithms allow Sensi+ to differentiate contaminant absorption from the natural gas background, eliminating the need for chemical gas scrubbers.
Validation experiments with custom gas mixtures demonstrate Sensi+'s accuracy across varying gas compositions. Interference uncertainty remains low, making it a reliable choice for measuring H₂S, CO₂, and H₂O.
In conclusion, Sensi+ revolutionizes natural gas quality monitoring by confidently measuring contaminants, regardless of source gas, processing stage, or composition variations, without the need for chemical scrubbers or custom analyzers.
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This information has been sourced, reviewed and adapted from materials provided by ABB Measurement & Analytics - Analytical Measurement Products.
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