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Preferred Instruments

Preferred Instruments manufactures microprocessor based controllers, instruments, and electric actuators for combustion and process applications. Preferred Instruments also manufactures oil tank gauging and leak detection equipment. A major component of the Instrument group sales is from control systems integration and personal computer based Supervisory Control and Data Acquisition systems. Preferred Utilities' industrial factory is located in Danbury, CT


Key Features

  • Multiple Torque Output Options
  • Self Locking Drive System To Hold In Last Position
  • Designed For Modulation Service

Link Trim Actuator
Model LTA, Link Trim Actuator – Easy to install actuator used for Oxygen Trim control on single point positioning (Jackshaft) burners. The LTA mounts in-line as part of the burner fan damper linkage rod assembly.

Model SM, Servo Actuator
Model SM, Rotary Servo Actuator – Modulates, and closes the valves and/or dampers in accordance with the integrated combustion control and burner management system programs.

Model UM, Servo Actuator
Model UM, Servo Actuator – Used on boiler control applications that have a maximum of 720 ft-lbs torque required. For heavier-duty service – consult the factory.

Power Arm Linear Actuator
Model PL, Power Arm Linear Actuator – This unit may be started, stopped or instantly reversed at any point within the stroke without damage, over heating or loss of power.