Fieldbus & Industrial Networking


Smart Wireless vibrating fork liquid level switch

October 2012 Fieldbus & Industrial Networking

Emerson Process Management has enhanced its Rosemount 2160 IEC 62591 (WirelessHART) vibrating fork liquid level switch with faster update rates and advanced broadcasting functions to improve its suitability for critical level control applications. The 2160 also features improved diagnostic capabilities that help to reduce plant maintenance costs. Typical applications for the level device include overfill protection, high and low level alarms, pump control (limit detection), pump protection and empty pipe detection.

The Rosemount 2160 level switch now provides one second update rates, extending the range of suitable level control applications to include fast moving applications such as those found in batch filling. Wireless network redundancy and robustness enable customers to extend their use to critical monitoring and control applications.

For monitoring applications, a unique trending capability enables the collection of data samples for a specified device variable. This reduces the number of transmissions over the wireless network, optimising power module life. A new advanced broadcasting function ensures that changes in process value, frequency of the vibrating fork, battery voltage or temperature are transmitted immediately, thereby improving both safety and diagnostic capability.

The 2160 has no moving parts and requires minimal maintenance. The condition of the forks is continuously monitored to help identify corrosion, build up or damage. Plant-wide alerts can be configured to warn of changes in an instrument’s status, giving operators advanced warning of any potential instrument health problems. Should an operator need to inspect the unit, a new ‘squawk’ feature helps identify a specific device. An integral LCD display showing switch output states and diagnostics provides real time, accurate verification of process conditions.

The 2160 liquid level switch is virtually unaffected by flow, bubbles, turbulence, foam, vibration, solids content, coating, liquid properties and product variations. It is designed for use in extreme temperatures and performs in harsh process conditions that are unsuitable for other switches. Two models are available, covering the temperature range -68 to 260°C.

For more information contact Mark Tapson, Emerson Process Management, +27 (0)11 451 3700, mark.tapson@emerson.com, www.emersonprocess.com



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