Core Technical Advantages
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Mechanical Precision: The sensor features a knife-edged driver bearing and a plated brass ball bearing for the torque tube shaft. This design minimizes friction, allowing the controller to respond to minute changes in fluid specific gravity.
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Application Versatility: Because it senses displacement (buoyancy) rather than just a simple float level, it is effective for monitoring the boundary between two immiscible liquids (interface) or detecting density changes in a single fluid.
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Field Flexibility: The controller action is field-reversible from direct to reverse without needing additional parts. Sensors can be either right- or left-hand mounted to accommodate existing piping layouts.
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Supply Pressure Conservation: To lower operational costs and reduce emissions, the relay exhaust opens only when the input signal changes, conserving supply air or gas during steady-state operation.
Technical Core
| Feature | Technical Specification / Detail |
| Control Type | Pneumatic Proportional or Proportional-plus-Reset |
| Input Signal | Liquid Level, Interface, or Density (Displacement-based) |
| Max Outlet Pressure | 35 psi (2.4 bar) |
| Area Classification | Group II Category 2 Gas and Dust |
| Certifications | ATEX, PED, CUTR |
| Supply Media | Air or Natural Gas |
| Mounting Type | 249 Series Torque Tube Arm Mounted |
| Stability Feature | Standard liquid damping orifice in cage sensor connection |
Xi’an Yunrui Trading Co., Ltd. Technical Support
Xi’an Yunrui Trading Co., Ltd. is a major supplier of Fisher brand products. We specialize in providing original, high-efficiency Emerson automation solutions to industrial clients. Beyond supplying core hardware like the 2500 Pneumatic Level Controller, we leverage deep technical expertise to provide professional support and model selection guidance for procurement and engineering projects. By optimizing our supply chain, we provide a distinct pricing advantage, ensuring we offer highly competitive prices while assisting clients in optimizing processes and achieving digital upgrades.
If you require a specific mounting orientation or need to match a displacer material (such as Monel or Stainless Steel) to a corrosive process fluid, please contact our technical team for a detailed quote.
