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Health & Safety


Accurate gas sensing is a crucial feature of plant health and safety regimes – and also for the efficient and reliable operation of oil and gas plants. Eugene McCarthy reports.


Eugene McCarthy informa que el sensor de gas preciso es una característica crucial para los regímenes de salud y seguridad de la planta, así como para la operación eficiente y fiable de las plantas de petróleo y gas.


Die genaue Gasmessung ist wesentlich für Gesundheits- und Arbeitsschutz im Werk und auch für den effizienten und zuverlässigen Betrieb von Öl- und Gasanlagen. Eugene McCarthy berichtet.


Leak detector recognises ultrasound ‘fingerprints’


D


esigned to withstand the harshest environments, from arctic to tropical conditions, the new FlexSonic acoustic gas


leak detector (Fig. 1) from Det-Tronics is described the company as a revolutionary step forward over traditional gas leak detectors. “It’s the first non-contact gas leak detector of its kind that recognises unique ultrasound ‘fingerprints,’” said md Jerry Slocum.


Te detector analyses 24 discrete ultrasonic bands, ignoring nuisance ultrasonic sources. A high-fidelity microphone continuously monitors for the distinct ultrasound emitted by pressurised gas leaks across the widest spectrum of frequencies. Unlike traditional non-contact gas leak detectors, the FlexSonic detector can be programmed to ignore background noises, discerning between gas leaks and environmental noises such as metal-on- metal contact, fans, machinery or vehicles. For noisy applications, it learns both regularly occurring and random sounds, detecting the actual acoustic gas leak ‘signature’.


“Tis next-generation technology improves gas leak detection capabilities by recognising real leaks and reducing false positives,” said Michael Bragg, product group manager, Det-Tronics. “For potentially hazardous locations, the FlexSonic detector offers an additional layer of protection that complements traditional gas leak detectors.”


Te company has also


Fig. 1. The FlexSonic acoustic gas leak detector from Det-Tronics recognises unique ultrasound ‘fingerprints’.


announced that its X3302 multi spectrum infra red (IR) hydrogen flame detector is certified as SIL 2 capable by Exida. As a result it now can be used in extreme


hazard applications that pose a high risk of hydrogen fire, including refineries, chemical loading, compressor areas, and gas plants. For its part, Emerson Process


Management has released the Micro Motion gas density meter, the next generation of the Micro Motion 7812 gas density meter designed for natural gas custody transfer, refinery/ fuel gas measurement, hydrogen purity monitoring and many other process gas applications. In applications where the ultimate in


real-world measurement performance is required, the Micro Motion gas density meter is the ideal choice to solve problems that users confront on a daily basis such as reducing custody transfer gain/loss errors, inefficient hydrogen cooling of turbines or reduced steam heat and reliability from fired heaters. Emerson says this meter raises the


standard in online density metering by using proven Ni-span C vibrating cylinder technology that is optimised to ensure outstanding performance under varying process and environmental conditions. Te meter’s quality is complemented


by a new, state-of-the-art, automated calibration facility. Calibrations are traceable to national standards with an optional IEC/ISO17025 accreditation that ensures compliance to the most stringent custody transfer requirements.


Te gas density meter also incorporates a new diagnostic capability called known density


verification that checks the meter for measurement alarm conditions, sensor integrity and the presence of coating, erosion or corrosion. Tis expands the availability of diagnostics information in critical density measurement applications and can result in significant


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