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Fisher™ 2500 Pneumatic Level Controller
Fisher 2500 Controller
Fisher 2500 pneumatic level controllers provide rugged, dependable, and simply constructed pneumatic instrumentation for liquid level, interface level, and density service.
Fisher™ 2500 Pneumatic Level Controller


Area Classification
Group II Category 2 Gas and Dust
Max Outlet Pressure
35 psi
Mounting Type
249 Series Torque Tube Arm Mounted
Operating Temperature
Standard Temperature
Position Control
On/Off, Control, Monitoring
Process Control
Supply Media
Air, Natural Gas
Other Configurations
Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.


  • Set point, proportional valve opening, and reset changes are made with simple dial knob controls.
  • Few moving parts are used. A knife-edged driver bearing in the sensor and the plated brass instrument case ball bearing for the torque tube rotary shaft help to provide low-friction operation.
  • Available in a variety of orientations and connection styles, and all sensors can be either right- or left-hand mounted.
  • Displacer reaction to small specific gravity changes allows these instruments to be used for level, interface of two fluids, and density applications where a response to low levels of input signal change is required.
  • Action is field reversible from direct to reverse or vice versa, without additional parts.
  • Supply pressure conservation is enhanced in all constructions because relay exhaust opens only when input signal changes.
  • Comes standard with a liquid damping orifice in the lower equalizing connection for the cage sensor that helps provide additional stability.