Rosemount™ 2555 Solids Level Switch – Capacitance Probe

Description

Rosemount™ 2555 Solids Level Switch

Reliable Capacitance Measurement For Bulk Solids

The Rosemount™ 2555 Solids Level Switch offers industry‑leading performance for point‑level detection using a rugged capacitance probe design. Engineered to operate across a wide spectrum of bulk solids, it is suitable for monitoring full, demand, or empty conditions in virtually any vessel—flat‑roof silos, cone hoppers, bins, or process reactors. Its sensitivity to materials with a dielectric constant as low as 1.5 makes it ideal for low‑density or non‑conductive solids that challenge traditional sensing technologies. By withstanding operating pressures up to 363 psi (25 bar) and temperatures as high as 932°F (500°C), the Rosemount 2555 delivers reliable service in extreme industrial environments. The combination of Emerson engineering precision and field‑proven robustness ensures accurate level switching even in high‑stress applications.

Performance Stability Under Extreme Process Conditions

Unmatched durability characterizes the Rosemount 2555, designed specifically for severe operational demands. It resists high mechanical stress, tensile forces, and material impacts common in bulk storage facilities. Built for deployment in high‑temperature and high‑pressure zones, it retains accuracy without drift over time, minimizing recalibration needs. Active Shield Technology eliminates false switching by preventing material build‑up, coating, or caking on the probe surface—a crucial advantage for sticky or adhesive solids like hydrated lime, gypsum powder, or plastic pellets. This immunity to contamination greatly reduces maintenance downtime while preserving operational safety in industries ranging from energy production to cement manufacturing.

Flexible Applications Across Diverse Global Industries

Versatility is the hallmark of the Rosemount 2555, which supports a wide range of industrial applications:

• Cement and aggregate: perfect for clinker silos, gypsum bins, and fly ash storage under harsh process conditions.
• Food and beverage: accurate detection for ingredients like sugar, flour, milk powder, and starch, even under high humidity.
• Chemical manufacturing: reliable performance for polymer pellets, detergents, pigments, and catalysts in corrosive or pressurized vessels.
• Agriculture: manages grain, feed, seed, and fertilizer inventories in automated silos with precision and minimal maintenance.
• Power generation: controls coal handling systems, biomass feedstocks, and waste byproducts safely, ensuring balanced fueling.

These application examples demonstrate the adaptability of capacitance sensing across different dielectric properties without compromising reliability.

Ease Of Installation And Calibration Process

The Rosemount 2555 simplifies commissioning through intuitive features like automatic calibration via push‑button controls and a clear internal display. This user‑friendly design enables rapid setup without requiring specialist instruments, ensuring operators can deploy the switch quickly across multiple vessels. The optional remote electronics housing allows installation in hazardous or space‑restricted environments by keeping sensitive components away from direct exposure. Broad compatibility with standard relay outputs ensures easy integration into legacy or modern PLC systems, while mechanical adaptability supports horizontal, vertical, or angled probe positioning. These integration advantages reduce engineering time during plant upgrades or maintenance interventions.

Active Shield Technology For Measurement Reliability

At the heart of the Rosemount 2555’s reliability is Emerson’s proprietary Active Shield Technology, engineered to repel dust, adhesions, and crust formations on the sensing probe. By dynamically isolating the measurement signal from interference, it guarantees stable detection even when the probe is immersed in sticky or cling‑prone materials. For industries processing hygroscopic powders or granulated solids, this technology dramatically cuts cleaning frequency and prevents costly shutdowns. Whether handling flour in a bakery silo or clinker in a cement tower, operators benefit from consistent switching responses that safeguard product quality, protect equipment, and maintain continuous workflow.