Rosemount 2555 Solids Level Switch – Capacitance Probe
1. Product Description Below Price
The Rosemount 2555 Solids Level Switch uses advanced RF capacitance probe technology to provide reliable point-level detection for powders, grains, and bulk solids in silos, hoppers, and process vessels. Designed for materials with dielectric constants as low as 1.5, it supports full, demand, and empty detection across a wide range of industrial solids-handling applications.
Featuring Active Shield Technology, the Rosemount 2555 helps minimize false switching caused by material buildup or caking on the probe. Its robust construction supports demanding applications involving high temperatures, heavy mechanical loads, and high tensile forces, while automatic calibration, self-diagnostics, and hazardous-area approval options simplify commissioning and support dependable operation.
2. Product Overview
Product Introduction
The Rosemount 2555 is a capacitive solids level switch designed to detect the presence or absence of bulk material at a defined point in a vessel. It measures the change in RF capacitance between the probe and the vessel wall as material covers or uncovers the probe, switching its output to indicate the level condition.
Its Active Shield Technology helps maintain reliable detection when material accumulates on the probe, making it particularly useful for challenging applications involving dust, coating, or caking. With rod and cable probe options, automatic calibration, and configurable switching behavior, the Rosemount 2555 can be adapted to a variety of vessel designs and process conditions.
Key Features
- RF capacitance measurement for reliable point-level detection of bulk solids
- Low dielectric material detection down to a dielectric constant of 1.5
- Active Shield Technology to minimize false switching caused by buildup and caking
- Full, demand, and empty detection for silo and vessel monitoring
- Automatic calibration to simplify commissioning
- Continuous self-diagnostics for device condition monitoring
- Robust probe design for high mechanical loads and tensile forces
- High-temperature capability up to 500°C (932°F) for applicable configurations
- High-pressure capability up to 25 bar (363 psi) for applicable configurations
- Rod and cable probe options for different installation requirements
- Hazardous-area and hygienic approval options depending on configuration
- Fail-safe high or low switching modes for application-specific alarm strategies
Suitable Applications
- Silo high-level and low-level detection
- Hopper and storage bin monitoring
- Cement and lime production
- Sand and mineral processing
- Grain and agricultural storage
- Chemical powders and granules
- Plastic pellets and polymer powders
- Fertilizer production
- Food ingredient handling
- Power generation and bulk material storage
- Sticky or caking-prone solids
- High-temperature solids processes
Technical Highlights & Selection Considerations
- Measurement principle: RF capacitance changes as the material covers or uncovers the probe. The switch detects this change and updates its output.
- Dielectric constant: Suitable for materials with dielectric constants as low as 1.5. Actual performance depends on material properties and installation conditions.
- Active Shield Technology: Helps reduce the influence of buildup on the probe, particularly in coating- or caking-prone applications.
- Probe type: Select a rod or cable version based on vessel dimensions, mounting position, material movement, and mechanical loading.
- Installation orientation: Rod versions support vertical, horizontal, and angled installation; cable versions are intended for vertical installation.
- Process limits: Maximum ratings of 500°C (932°F) and 25 bar (363 psi) apply to suitable configurations. Confirm the permitted temperature and pressure for the exact probe, housing, and process connection.
- Electrical output: Output type and supply requirements depend on the selected electronics.
- Calibration and sensitivity: Correct setup depends on the material's dielectric properties and the application. Follow the manufacturer's commissioning instructions.
- Safety behavior: Select fail-safe high or low switching according to the required control or alarm response.
- Certifications: Hazardous-area and hygienic approvals are configuration-dependent. Verify the required certifications and wetted-material compatibility before ordering.
Frequently Asked Questions
Q1: What is the Rosemount 2555 used for?
It detects whether bulk solids have reached or moved away from a defined level in silos, hoppers, bins, and process vessels.
Q2: How does the Rosemount 2555 work?
It measures RF capacitance between the probe and the vessel wall. When material covers or uncovers the probe, the capacitance changes, triggering the corresponding switching output.
Q3: Can the Rosemount 2555 detect materials with low dielectric constants?
Yes. It is designed to detect solids with dielectric constants as low as 1.5, subject to suitable application conditions and correct configuration.
Q4: What is Active Shield Technology?
Active Shield Technology helps minimize the effect of material buildup or caking on the probe, reducing the risk of false switching in challenging solids applications.
Q5: What are the maximum operating temperature and pressure?
The product datasheet lists capabilities up to 500°C (932°F) and 25 bar (363 psi) for applicable configurations. The actual limits depend on the selected probe and process connection.
Q6: What should I consider when selecting a Rosemount 2555?
Consider the material's dielectric constant and tendency to build up, vessel dimensions, probe type and length, mounting orientation, process temperature and pressure, electrical output, and required approvals.
3. SEO Page Title
Rosemount 2555 Solids Level Switch | ProInstru
4. Meta Description
Rosemount 2555 capacitance probe level switch for bulk solids, with Active Shield Technology, automatic calibration and robust high-temperature performance.
5. Product Image SEO
- Image File Name: rosemount-2555-solids-level-switch-capacitance-probe.jpg
- Alt Text: Rosemount 2555 capacitance probe solids level switch for silo and hopper level detection
- Image Title: Rosemount 2555 Solids Level Switch – Capacitance Probe
- Image Caption: Reliable bulk solids point-level detection with Active Shield Technology for demanding industrial applications.
