Emerson vibrating fork allows level detection in harsh conditions
Emerson Automation Solution has unveiled its new vibrating fork level detector, which monitors the presence or absence of liquids and sand/liquid build-ups, and aims to provide safe level detection in harsh conditions. The Rosemount 2140 is the world's first wire Hart vibrating fork level detector and offers reliable level detection while increasing the safety and efficiency of plant and workers. It is easy to install as it has no moving parts and is largely unaffected by flow, vibration and product variations.
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The Rosemount 2140 HART vibrating fork level detector (photo: Emerson)

Emerson Automation Solutions has launched the Rosemount 2140, the world’s first wired HART vibrating fork level detector. Offering enhanced ease-of-use, smart diagnostics, and remote proof-testing capability, the device provides reliable level detection while helping increase the safety and efficiency of both plant and workers.

The Rosemount 2140 performs in applications with high temperatures and harsh conditions unsuitable for other level monitoring devices. It is easy to install and maintain as there are no moving parts. The device is virtually unaffected by flow, bubbles, turbulence, foam, vibration, sediments content, coating, liquid properties and product variations. It can be used to monitor not only liquids but also liquid-to-sand interface, which enables the build-up of sand or sludge deposits in a tank to be detected.

Compatible with the HART 5 and HART 7 hosts, the Rosemount 2140 enables operators to continuously monitor electronic and mechanical health. Frequency Profiling functionality immediately detects any build-up, fork blockage, or excessive corrosion, indicating maintenance may be required and allowing this to be scheduled during periods of downtime. In addition, Power Advisory functionality monitors voltage and current drawn over the device’s lifetime with a Process Alert for potential issues that could become a problem, such as corrosion.

An optional integral LCD display shows switch output states and diagnostics so an operator can inspect the device locally. Also, selectable Media Density and Media Learn functions help configure appropriate density settings to calculate and maintain optimum and consistent switching points in fluids of unknown properties so the device always switches with the highest degree of reliability.

For safety-critical applications, a dedicated version of the Rosemount 2140 certified to IEC61508 is available with a 97% safe failure fraction and 96% diagnostics coverage, making it one of the safest devices in the current SIL2 market.

For installations within safety instrumented systems, a fully-integrated remote proof-testing capability eliminates the need to access the top of the vessel for extracting the device from the process. This saves time and increases process availability, worker safety and efficiency.