Vibrating Fork Switch 2120D MOBREY

Overview of the Rosemount 2120 Level Switch Measurement principle The Rosemount 2120 is designed using the principle of a tuning fork. A piezo-electric crystal oscillates the forks at their natural frequency. Changes to this frequency are continuously monitored. The frequency of the vibrating fork sensor changes depending on the medium in which it is immersed. The denser the liquid, the lower the frequency. When used as a low level alarm, the liquid in the tank or pipe drains down past the fork, causing a change of natural frequency that is detected by the electronics and switches the output state. When the Rosemount 2120 is used as a high level alarm, the liquid rises in the tank or pipe, making contact with the fork which then causes the output state to switch. Key features and benefits  Function virtually unaffected by flow, bubbles, turbulence, foam, vibration, solids content, coating products, liquid properties, and product variations  The Rosemount 2120 is designed for operation in process temperatures from –40 to 302 °F (–40 to 150 °C)  A ‘heartbeat’ LED indicates its operating state. The LED also flashes when the switch output is ‘off’ and is constantly lit when 'on'  Adjustable switching delay prevents false switching in turbulent or splashing applications  ‘Fast drip’ fork design gives quicker response time, especially with viscous liquids. Rapid wet-to-dry and dry-to-wet time setting for highly responsive switching  Fork shape is optimized for polishing to meet hygienic requirements. Mechanical- and electro-polishing options.  Magnetic test point makes functional test easy  No moving parts or crevices for virtually no maintenance