Preferred Instruments

Preferred Instruments manufactures microprocessor based controllers, instruments, and electric actuators for combustion and process applications. A major component of the Instrument group sales is from control systems integration and personal computer based Supervisory Control and Data Acquisition systems.  This includes; system design, engineering drawings, manuals, system fabrication, custom software, configuration, test, and field start up. Preferred Instruments has the experience and expertise to develop products for industrial burners and boilers flame safeguards, industrial process optimization, and process controls.

Servos & Actuators

Link Trim Actuator 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. Request More Information
Model SM, Servo Actuator Rotary Servo Actuator - Modulates, and closes the valves and/or dampers in accordance with the integrated combustion control and burner management system programs. Request More Information
Model UM, Servo Actuator Servo Actuator - Used on boiler control applications that have a maximum of 720 ft-lbs torque required. Request More Information
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. Request More Information

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Flame Safe Guard

QA-16 Data Acquisition System 16 Point Data Acquistion Module - Inexpensive 16-point data acquisition system for use on single burner, and small multiple burner combustion systems. Request More Information
Quanta Flame 5004-01 UV Scanner Ultraviolet (UV) Sensor for Monitoring Gas or Oil Flames - Scanners are recommended for detecting flames from standard fuel gases, some waste gases and light oil fuels such as No. 2 oil. Request More Information
Quanta Flame Flame Safeguard Controller Controls - Sequences the burner through Purge, Ignition, Pilot Trial for Ignition, Main Trial for Ignition, and Run modes. It monitors the burner flame and running interlocks to safely shut down the burner in the event of an unsafe operating condition. Request More Information

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Control System Integration

BurnerMate Light Powerful, economical burner control Request More Information
BurnerMate TS Boiler Control System Custom-programmable boiler control and flame safeguard system that includes one or two DCS-III loop controllers and a flame safeguard microprocessor communicating via Modbus with a 10” or 15” OIT touch screen. Request More Information
BurnerMate Universal Boiler Control System Complete boiler control in an economical, off-the-shelf, pre-programmed controller. Separate processors are used for flame safeguard and combustion control for NFPA 85 compliance. Request More Information
BurnerMate Universal Industrial Our U.L. recognized and FM Approved expanded system offers complete fully metered boiler control in an economical, off-the-shelf, pre-programmed controller. Separate processors are used for flame safeguard and combustion control providing NFPA 85 compliance. Request More Information
BurnerMate Universal: BMU-Edit Software that runs on your Windows-based PC and allows you to set the parameters of the BurnerMate Universal from your laptop. Communication between the BMU and your PC is done via a standard USB A/B (printer) cable. Request More Information
Chief Dispatcher Boiler Plant Master Control System Chief Dispatcher Modulating Lead Lag Control System - Off-the-shelf, standard modulating lead/lag applications can be expanded to control circulating water variable speed pumps and isolation valves while monitoring the flame safeguard and boiler control systems Request More Information
Feedwater Center Control System Feedwater Center, Boiler Feedwater Controller - Designed to control the surge tank, Deaerator (DA) tank, transfer pumps, and feedwater pumps (on-off or VSD) to improve water quality and feedwater system reliability. Request More Information
UtilitySaver Boiler Retrofit Controller UtilitySaver Fuel and Electricity Saving Controller - Designed to minimize total energy consumption of a burner (both fuel and electricity usage). UtilitySaver combines the fuel savings of an Oxygen trim system with the electrical kWh savings of a Variable Speed Drive (VSD) FD fan. Request More Information
PCC-III Digital Loop Controller Multiple Loop Controller - Large I/O quantity, integral oxygen sensor, highly visible front panel, intuitive “Blockware”, redundant memories, and built-in industry standard communications. Request More Information
Plant Wide Controller (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. Request More Information

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SCADA Systems

SCADA/Flex Distributed Control System Supervisory Control And Data Acquisition System - Designed to provide remote operation, graphic display of information, alarm message display, report generation, historical trending and remote controller tuning. Request More Information

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Draft Controls

JC-22D Draft Controller Draft Monitor and Controller - Microprocessor based draft controller, indicating instrument, and alarm monitor. Request More Information
Draft Range Transmitter Assembly Draft Transmitter with Low Draft Cutout Switch - Field mountable boiler draft range transmitter and independent high pressure cut-out switch with 5 second time delay relay. Request More Information

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Smoke Opacity Monitor

JC-30D Smoke Opacity Monitor 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. Request More Information

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Temperature Control

JC-15D Flue Gas Temperature Monitor 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. Request More Information

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Please contact us today. 800-667-1779.

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