Product Overview: The Industry Standard for Point Level Detection

The Rosemount 2120 Vibrating Fork Level Switch is a robust and highly reliable point level detector designed to prevent overfills, run-dry pump conditions, and control high or low levels in vessels. Its simple yet effective principle-detecting the frequency shift of a vibrating fork when submerged-makes it immune to common process disturbances that plague other technologies. Trusted across industries, the 2120 is the definitive solution for applications where safety, reliability, and minimal maintenance are non-negotiable.

Common Challenges & The Rosemount 2120 Solution

Challenge	Common Issue with Other Technologies	How Rosemount 2120 Solves It
False Trips from Foam & Turbulence	Capacitance, optical, and float switches can falsely trigger due to foam, splashing, or agitated surfaces.	Tuning Fork Technology: Only detects the density of the actual liquid, ignoring foam, air bubbles, waves, and turbulence for unwavering reliability.
Fouling & Buildup on Sensor	Switches with moving parts or sensing surfaces can fail due to coating, clogging, or material buildup.	Self-Cleaning Action: The continuous vibration of the fork minimizes material adhesion and prevents buildup, ensuring long-term performance.
Failing in Abrasive or Viscous Media	Floats can get stuck, and diaphragms can wear out, leading to failure and process shutdowns.	No Moving Parts to Clog or Wear: A simple, solid fork design offers exceptional resistance to wear from abrasive slurries and is unaffected by high viscosity.
Complex Installation & Calibration	Some switches require complex wiring, calibration, or frequent adjustment after installation.	Simple Two-Wire Installation: Easy to install and set up. No calibration required-it's essentially "plug-and-play" for quick commissioning.
Harsh Process Conditions	Standard switches may not withstand high pressure, temperature, or corrosive chemicals.	Robust Construction: Available in a variety of materials (316L SS, Hastelloy, Alloy C-22) to handle extreme pressure, temperature, and corrosive environments.

Core Technical Advantages

· Tuning Fork Principle: Detects the precise resonant frequency shift caused by liquid immersion, providing a highly reliable and maintenance-free switching action.

· No Calibration Required: The setpoint is fixed at the factory, eliminating the need for on-site calibration and the potential for human error.

· High Reliability & Safety: Offers a high degree of repeatability and is suitable for Safety Instrumented Systems (SIS) up to SIL 2 certification, helping to prevent costly and dangerous incidents.

· Flexible Electrical Options: Available in both AC and DC voltages, with SPDT or DPDT relay outputs, and a NAMUR NE 43 option for hazardous area applications with a barrier.

· Global Hazardous Area Certifications: Certified to ATEX, IECEx, FM, CSA, and more for global deployment in Division/Zone 1 and 2 areas.

Typical Application Scenarios

· Pump Protection: Prevent pump run-dry conditions in transfer and charge pumps.

· Overfill Prevention: Reliable high-level alarm and shutdown in storage tanks and process vessels.

· Low-Level Detection: Ensure adequate fluid volume in day tanks, mixing vessels, and boilers.

· Slurry & Abrasive Services: Level detection in mining, mineral processing, and wastewater sludge applications.

· Chemical Processing: High/low level control in aggressive chemical tanks and reactors.

Why Choose the Rosemount 2120

Choosing the Rosemount 2120 is an investment in process safety and operational continuity:

· Unmatched Proven Track Record: The most trusted name in vibrating fork technology, with a global installed base proving its reliability every day.

· Reduced Cost of Ownership: Virtually zero maintenance and no requirement for recalibration translate into significant savings on labor and downtime over its lifespan.

· Engineered for Safety: Designed and certified for use in safety loops, providing peace of mind and helping you meet functional safety standards.

· Global Support Network: Backed by Emerson's extensive global service and support infrastructure, ensuring you have help when you need it.

Product Keyword

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