Description
Rosemount 2501 Rotating Paddle Solids Level Switch Technical Data and Engineering Selection Guide
Rosemount 2501 Rotating Paddle Solids Level Switch is supplied by SANTAN for new projects, installed-base replacement and complete model-code review. The verified information below supports preliminary engineering selection and quotation preparation.
Verified Product-Family Specifications
| Measurement principle | Rotating-paddle point-level detection |
|---|---|
| Media | Powders, granules and coarse bulk solids |
| Mounting | Vertical, horizontal or oblique installation |
| Material sensitivity | Suitable vane options are available for low-density solids; verify the selected density range |
| Process conditions | Standard and high-temperature configurations; confirm limits from the complete order code |
| Functions | Covered/uncovered detection with configurable switching behavior |
| Diagnostics / safety | Self-monitoring, switching-delay and fail-safe options by configuration |
| Mechanical selection | Multiple paddles, shafts/extensions, process connections and construction materials |
Published values describe the product family and are configuration dependent. Final range, accuracy, materials, pressure, temperature, approvals, communications and accessories must be checked against the selected Emerson/Rosemount model code and current documentation.
Best-Fit Application
Use the 2501 for high, demand or empty detection in silos and hoppers. Select the paddle and extension from the real bulk density, particle size, buildup, mechanical load and mounting direction; do not apply a product-family temperature extreme without the exact high-temperature model code.
Quotation and Selection Data Required
| Application | Continuous level, interface, open-channel flow, alarm or overfill duty |
|---|---|
| Process | Liquid/solid properties, dielectric constant, density, viscosity, foam, dust and buildup |
| Geometry | Measuring range, tank/silo dimensions, nozzle, obstructions and mounting position |
| Design limits | Operating/design pressure and temperature; wetted-material requirements |
| Electrical | Power, wired/wireless output, update rate, enclosure and hazardous-area requirements |
| Compliance | SIL, hygienic, custody-transfer, drinking-water or other project approvals |
Related Engineering Resources
- Level solutions for tanks, reactors and silos
- How to prepare an instrument inquiry
- SITRANS LPS200 rotating-paddle switch
- Rosemount 2160 liquid point-level detector
- SIL, IP rating and material selection
- Level measurement products
Official Manufacturer Reference
Emerson official Rosemount 2501 product page and November 2025 product data sheet
Request a Quote
Send the complete Rosemount model code, quantity and process data to sales@santanfluid.com. For a faster engineering review, use WhatsApp: +86 136 9022 3185 (China) or +62 823 1767 3750 (Indonesia). SANTAN will confirm the selectable configuration before quotation; no online payment is required.
Standard Technical Specification Summary
Use these fields for preliminary selection. Final values depend on the complete manufacturer model code and selected options.
| Model | Rosemount 2501 Solids Level Switch - Rotating Paddle |
|---|---|
| Measurement Range | Bulk solids down to 15 g/L minimum density depending on paddle and sensitivity; boom length 70 to 4000 mm; up to 1100 deg C and 10 bar |
| Accuracy | Repeatable point-level detection with adjustable sensitivity; response depends on paddle, material density and installation |
| Process Connection | Process connections from 1 inch NPT with threaded and flanged options; vertical, horizontal or oblique mounting |
| Output Signal | Motor-driven rotating paddle with relay or switch output; supply and contact configuration depend on order code |
| Certifications | ATEX, IECEx and FM hazardous-location options are available by configuration |
| Application Industries | Cement and aggregates; grain and feed; plastics; chemicals; mining; powders, pellets and bulk-solid silos |
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