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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



PCC-III Digital Loop Controller
Model PCC-III, Multiple Loop Controller – Large I/O quantity, integral oxygen sensor, highly visible front panel, intuitive “Blockware”, redundant memories, 4-20 mADC input and outputs, 120 VAC discrete contact inputs, isolated relay outputs, 24 VDC transmitter power supply, the ability to control electric positioners directly and built-in industry standard communications allows the PCC-III to be integrated into complex systems with a minimum number of external components.

Plant Wide Controller (PWC)
Model PWC, Plant Wide Controller – Standard applications for boiler modulating lead/lag, cooling towers and air compressors can be expanded to include additional monitoring or control additional pumps, variable speed drives and valves.