Emerson Process Management”s Rosemount 2130 vibrating fork liquid level switch is designed for use in extremes of temperature from -94 F to +500 F (-70 C to +260 C). The new version has built-in fault monitoring/self-checking diagnostics, making it a good fit for applications in the chemical, power generation and oil & gas industries. The level switch is already widely accepted for high- and low-level alarm and pump control duties and requires no on-site calibration. The addition of the extreme-temperature version expands the application range. A “heart-beat” LED gives an instant visual indication that the unit is operational. A built-in fault monitoring/self diagnostic can detect any corrosion of the forks, or any other internal or external damage or breaks in the internal electrical wiring, thus triggering a warning LED and fail-safe handling of the load. A low-density option is available for liquids with a specific gravity down to 0.5 (500 kg/m3). Electronic output options support stand-alone use or integration as part of an analog or digital plant monitoring network. Available with 316L stainless steel as standard or corrosion-resistant alloy C wet side, as well as a choice of aluminium or stainless steel housing options.