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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

Monitoring Systems

Key Features

  • Panel Mounted
  • NEMA 4 Faceplate Operator Interface
  • LCD Display

Draft Damper Assembly
Model E-Link, Draft Damper Assembly – Pre-mounts a Model SM-15 servo actuator and JC-22XMTR Draft Range Transmitter Assembly. Only a stack draft connection is required.

JC-10D Digital Process Monitor
Model JC-10D, Process Bar Graph Indicator and Alarm Monitor – Microprocessor based indicator alarm that can be field configured for a wide variety of applications. The instrument provides a highly visible backlit LCD display with easy to understand bar graph, scaled numeric display, and front panel alarm messages.

JC-15D Flue Gas Temperature Monitor
Model JC-15D, Flue Gas Temperature Monitor – Microprocessor based indicating instrument with a heavy duty Thermocouple Assembly. Flue gas temperature is continuously displayed using a highly visible backlit LCD display. An intuitive bar graph display and alarm messages provide clear stack temperature status.

JC-22D Draft Controller
Model JC-22D, Draft Monitor and Controller – Microprocessor based draft controller, indicating instrument, and alarm monitor. The JC-22D directly accepts a 4-20 mADC draft transmitter signal, 120 VAC flame safeguard interface, and outputs a solid state switching (Triac) or 4-20 mADC outlet damper actuator control signal.

JC-30D Smoke Opacity Monitor
Model JC-30D, Smoke Opacity Monitoring System – Microprocessor-based indicating instrument with a smoke duct mounted optical sensing assembly. The system provides a continuous opacity readout, alarm indication and shutdown capability.