Vibrating Fork Level Switch Is Suitable For High And Low Level Alarms

Emerson Process Management has extended the capability of its Rosemount 2100 series of vibrating short fork level switches with the introduction of the Rosemount 2130 for (Safety Integrity Level) SIL 2 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 global organization Exida, the Rosemount 2130 has the required Failure Modes, Effects and Diagnostic Analysis (FMEDA) report. As a result, companies in the oil and-gas production, refining, petrochemical, chemical and power industries can benefit from the almost maintenance-free 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 2130 requires no on-site calibration, and the visible "heart-beat" LED gives an instant visual indication that the unit is operational. In addition, the 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.