The Rosemount 2130 is a vibrating fork level switch designed to detect whether a liquid has reached a predefined level. A piezoelectric element causes the fork to vibrate at its natural frequency. When the fork contacts liquid, the vibration frequency changes, allowing the electronics to identify the level condition and switch the output.
Its robust construction and plug-and-play design simplify installation and commissioning. The switch is designed to operate reliably despite many common process variations, including turbulence, foam, coating, vibration, and changes in liquid properties. Built-in diagnostics and a magnetic test point support convenient device-status checks and functional testing.
Key Features
- Vibrating fork technology for reliable point-level detection
- High- and low-level switching for liquid applications
- No moving mechanical parts for reduced mechanical wear
- No routine field calibration required
- Adjustable switching delay to help prevent false switching in turbulent or splashing conditions
- Fast-drip fork design for quicker response, particularly in viscous liquids
- Electronic self-checking for device condition monitoring
- Heartbeat LED for visible status and instrument health indication
- Magnetic test point for convenient functional testing
- SIL 2 safety certification for specified safety instrumented applications
- Multiple electronics and process connection options to suit different installations
- Hazardous-area protection options available for selected configurations
Suitable Applications
- Tank high-level and low-level alarms
- Overfill prevention
- Pump protection and dry-run prevention
- Chemical processing
- Oil and gas production
- Refining and petrochemical processing
- Water and wastewater treatment
- Liquid storage vessels
- Viscous liquid detection
- Pipeline and process equipment monitoring
- Safety instrumented systems
- Industrial liquid-level control
Technical Highlights & Selection Considerations
- Measurement principle: The switch detects changes in fork vibration frequency when the fork becomes immersed in liquid.
- Process conditions: Designed to handle challenging conditions such as turbulence, foam, coating, vibration, and changes in liquid properties. Confirm suitability for the actual process.
- Switching delay: Adjustable delay helps reduce nuisance switching caused by splashing or temporary turbulence.
- Viscous liquids: The fast-drip fork design supports quicker wet-to-dry switching. Confirm performance for particularly sticky or slow-draining liquids.
- Process temperature: The official datasheet lists an operating range of −70 to 260°C (−94 to 500°F) for applicable configurations. Verify the limits of the exact model and process connection.
- Mounting: Select a suitable process connection and orientation, allowing liquid to flow freely between the forks.
- Electrical output: Output types, supply requirements, and switching behavior depend on the selected electronics.
- Hazardous areas: Explosion-proof, flameproof, and intrinsically safe versions are available for selected configurations. Check the approvals required at the installation site.
- Safety certification: SIL 2 certification applies to specified configurations. Confirm the exact model certification and follow the manufacturer's safety manual.
- Functional testing: Use the magnetic test point according to the manufacturer's instructions and the site's proof-test procedure.
Frequently Asked Questions
Q1: What is the Rosemount 2130 used for?
It detects whether liquid has reached a preset high or low level in a tank, vessel, or pipeline, providing a switching signal for alarms, control, or protective interlocks.
Q2: How does the Rosemount 2130 work?
A piezoelectric element vibrates the fork at its natural frequency. When liquid contacts the fork, the vibration frequency changes, and the electronics switch the output accordingly.
Q3: Does the Rosemount 2130 require calibration?
It does not require routine field calibration for normal operation. Follow the manufacturer's instructions for installation, functional testing, and maintenance.
Q4: Can the Rosemount 2130 handle turbulent or foaming liquids?
It is designed to provide reliable switching under many challenging conditions, including turbulence and foam. An adjustable switching delay can help reduce false switching caused by splashing or transient process changes.
Q5: Is the Rosemount 2130 suitable for safety applications?
Specified configurations are SIL 2 certified to IEC 61508 for safety instrumented systems. Confirm the certification of the exact model and validate the complete safety function against applicable requirements.
Q6: What should I check before purchasing?
Confirm the liquid properties, process temperature and pressure, required switching delay, process connection, electrical output, power supply, mounting arrangement, and any hazardous-area or safety approvals.
