Safety
Open Path Gas Detection System for Simultaneous Methane & Hydrogen Sulphide Monitoring in Sour Gas
Oct 09 2009
Senscient’s (USA) ELDS™ is a new open path gas detection (OPGD) system, based on innovative Enhanced Laser Diode Spectroscopy™ (ELDS) detection technology designed to provide new levels of plant safety and risk reduction in offshore platforms, FPSO’s, onshore petrochemical facilities and refineries. Senscient ELDS OPGD systems provide many unique and attractive features designed to fulfill the promise of truly fit-and-forget open path gas detection.
ELDS offers reliable, open path detection of both methane and hydrogen sulphide in a single unit for sour gas leakage. This system has a faster response than any other hydrogen sulphide detection technology. It also
eliminates need to replace or re-calibrate sensors additionally there are no false alarms from any other gases including diesel fumes or oil mist. Owners of this system will enjoy true ease-of-installation, with vibration
and misalignment tolerant optics as well as the SimuGas™ feature, which provides the ability to accomplish on-demand, remote functionality testing right from the control room or PLC.
Using a separate transmitter and receiver configuration, Senscient [ISO-8859-1?]ELDS™ 2000 Series OPGD systems can detect and measure methane and hydrogen sulfide over distances between 5 and 40 m.
The ELDS technique measures the Harmonic [ISO-8859-1?]Fingerprint™ introduced onto the transmitter’s laser beam(s) by absorption by any target gas in the monitored path.
In the vast majority of instances, hydrogen sulfide is found as a component of the solution gas or natural gas present at the facility, intimately mixed with predominantly methane. When solution gas or natural gas containing hydrogen sulfide leaks, its components do not separate regardless of the density of the individual gases. It remains intimately mixed and the hydrogen sulfide follows the same leak path as the rest of the gas.
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