Vibrating fork level switch for safety instrumented systems
Rosemount 2130 switch certified for SIL 2 applications, even with low-density products.
Emerson Process Managementhas extended the capability of its Rosemount 2100 series of vibrating short-fork level switches with the introduction of the Rosemount 2130 for SIL 2 (safety integrity level) safety instrumented systems. This new version features built-in fault monitoring / self-checking diagnostics and is ideal for high and low level alarms.
Following successful third-party evaluation by Exida, the Rosemount 2130 has the required FMEDA (failure modes, effects, and diagnostic analysis) report. As a result, companies in the oil & gas production, refining, petrochemical, chemical, and power industries can benefit from low-maintenance vibration fork technology while ensuring compliance with associated IEC industry standards.
With several output types with a safe failure fraction (SFF) over 90%, the resulting FMEDA report shows SIL 2 suitability. As per IEC 61508 and IEC 61511, the documentation provides safety instrumentation engineers with the required failure data and with proof test recommendations. With a five-year-plus proof test interval, the proof test can be coordinated with plant turnaround, minimizing process interruption and reducing risk to personnel.
The Rosemount 2100 series is already a popular choice for high- and low-level alarm and pump control duties. The new 2130 version is simple and easy-to-use, reliable in a wide range of applications and requires no on-site calibration. The visible heart-beat LED gives an instant visual indication that the unit is operational. In addition, built-in fault monitoring / self diagnostics can detect extreme corrosion of the forks, or any other internal or external damage to the fork sensor, which triggers a warning LED and safe handling of the load.
Further functionality in the new version includes a low-density option suitable for liquids with a specific gravity down to 0.5 (500 kg/m3), a wide choice of electronic output options for use on their own, or as part of an analog or digital plant monitoring network.
罗斯蒙特2130是专为使用的极端temperatures ranging from -70 to 260 °C (-94 to 500 °F) and like other models in the Rosemount 2100 range, the new model is available with 316L stainless steel as standard, ECTFE/PFA copolymer coated 316L stainless steel, or corrosion resistant alloy C wet side, as well as a choice of electronic output types and aluminum or stainless steel housing options.
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Edited by Peter Welander, pwelander@cfemedia.com
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