Fisher 2502-249B Level-Trol Displacer Level Controller

The Fisher™ 2502-249B Level-Trol Displacer Level Controller is a pneumatic instrument engineered for precise control of liquid levels, liquid-liquid interfaces, or fluid density within industrial process vessels. This device combines a 2502 Series pneumatic controller with a 249B displacer-type sensor, ensuring accurate and reliable performance in various applications.

Key Features:

• Accurate Level Control: The 2502 Series controller receives input from the 249B displacer sensor, detecting changes in buoyant force corresponding to variations in liquid level or density. This input is then translated into a pneumatic output signal, facilitating precise control of connected final control elements.

• Durable Construction: Designed with minimal moving parts, the system incorporates a knife-edged driver bearing and a plated brass instrument case ball bearing for the torque tube rotary shaft, ensuring low-friction operation and extended service life.

• Ease of Maintenance: The controller features a spring-out wire that allows for in-service cleaning of the relay orifice, reducing downtime and maintenance efforts.

• Supply Pressure Conservation: The relay exhaust opens only when output pressure is being reduced, enhancing supply pressure conservation and operational efficiency.
  

Specifications:

• Controller Type: 2502 Series Pneumatic Controller

• Sensor Type: 249B Displacer-Type Level Sensor

• Output Signal: Standard pneumatic output signal proportional to the process variable

• Process Connections: Available in NPS 1-1/2 or 2 sizes, with options for screwed (NPT) or flanged connections adhering to ASME standards

• Pressure Rating: Up to CL600, accommodating a wide range of industrial applications

• Displacer Lengths: Standard lengths include 14 inches (356 mm) and 32 inches (813 mm), with additional lengths available depending on sensor construction

• Materials of Construction:

  • Cage, Head, Torque Tube Arm: Cast iron

  • Displacer: 304 Stainless Steel (standard); 316 Stainless Steel and other materials available upon request

  • Torque Tube: N05500 (standard); other materials available upon request
    

Applications:

The Fisher 2502-249B Level-Trol Displacer Level Controller is suitable for a variety of industrial applications requiring precise liquid level, interface level, or density control, including:

• Chemical processing

• Oil and gas production

• Refining operations

• Power generation

• Water and wastewater treatment