Design and validation of temperature-independent measurements
ABB has introduced Sensi+ NG, a compact natural gas contaminant analyzer based on a unique tunable diode laser (TDL) technology known as Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS). The technology accurately, reliably and simultaneously measures corrosive substances such as hydrogen sulfide, carbon dioxide, water and oxygen in real time in complex and time-varying natural gas streams.
Every field-installed analytical instrument will be exposed to varying ambient temperatures, whether from diurnal or seasonal cycles; this is unavoidable. Temperature variations can influence a variety of internal components, leading to a cumulative negative effect on final measurements. This paper introduces you to the key technology – OA-ICOS laser absorption – which is at the core of the Sensi+ NG multi-gas analyzer. This robust opto-mechanical design minimizes thermal influences that allow these devices to perform reliably and accurately across the full operating temperature range of -14oC to 55oC (7oF to 130oF).
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