2120D1AV1NAAA0000 2120 Series Fork Level Switch Vibrating Level Switch, Relay Output, Side or Top Mount, Glass Filled Nylon Body

Rosemount Liquid Level Switch_x000D_ The Rosemount Liquid Level Switch is designed using the principle of a tuning fork. A piezo-electric crystal oscillates the forks at their natural frequency. 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 2110 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._x000D_ Features and Benefits_x000D_ Materials of construction is 316/316L Stainless Steel (1.4401/1.4404) dual certified_x000D_ Process connection size is 1in BSPT (R) thread_x000D_ Relay DPCO, 20 to 264 Vac 50/60Hz, 20 to 60 Vdc_x000D_ Standard surface finish_x000D_ Housing has glass filled nylon and M20 conduits/cable threads_x000D_ Fork length is standard length of 1.7in (44 mm)_x000D_ Function virtually unaffected by flow, bubbles, turbulence, foam, vibration, solids content, coating products, liquid properties, and product variations_x000D_ Operation temperatures ranges from –40°C and 150°C_x000D_ A ’heartbeat’ LED indicates its operating state, LED also flashes when the switch output is ’off’ and is constantly lit when 'on'_x000D_ Adjustable switching delay prevents false switching in turbulent or splashing applications_x000D_ ’Fast drip’ fork design gives quicker response time, especially with viscous liquids_x000D_ Rapid wet-to-dry and dry-to-wet time setting for highly responsive switching_x000D_ Fork shape is optimized for polishing to meet hygienic requirements_x000D_ Mechanical- and electro-polishing options_x000D_ Magnetic test point makes functional test easy_x000D_ No moving parts or crevices for virtually no maintenance_x000D_ Specific extended fork length is factory default length (only if Fork Length A or H is selected)_x000D_ Applications_x000D_ Overfill protection_x000D_ High and low point level alarms_x000D_ Pump control or limit detection_x000D_ Run dry or pump protection_x000D_ Hygienic applications_x000D_ High-temperature applications_x000D_ Wireless applications_x000D_ Most liquids including coating liquids, aerated liquids, and slurries_x000D_ Certifications_x000D_ ATEX Intrinsic Safety