Instrument Quality Air. Compressed air supply that has been filtered of particulate and moisture.

Forming gas, a mixture of H₂ and N₂ gasses usually with 4% H₂ or less in the mixture.

Hydrogen gas; a concentration > 8% in air is considered explosive. For concentrations higher than 4%, FurnacePros requires inclusion of the Hydrogen Operation (HO) option to safely use hydrogen as a process gas in a furnace.

Input/Output signals as an aggregate.  IO is comprised of signals from one or more of these sources: AI (analog input), AO (analog output), DI (digital input), or DO (digital output)

Proportional Controller. Control loop feedback controller comprised of proportional (P), integral (I) and derivation (D) algorithms.  P adjusts the output based on a gain adjustment as a function of the present error.  The I function fine tunes the P adjustement based upon the accumulation of past errors.  The D adjusts the process control based upon a prediction of future errors.

4-inch (100 mm) belt. Built by RTC 4" furnaces were mostly single chamber, 2 and 3 zone high and low temperature models like the LA-304 and RA-304 and variations. 4-inch furnaces use same IR heating lamps as 6-inch series.

6-inch (150 mm) belt. Built by RTC 6" furnaces were mostly single chamber, 2 and 3 zone high and low temperature models like the LA-304 and RA-304 and variations.  RTC built a few TF-series and other series IR furnaces with 6-inch belts.  The LA series was discontinued by RTC in 2004.  In response to demand, LCI began offering an updated LA-306 with 1000C high temperature capability and LCI's newly designed Discrete Digital control system.  In addition LCI began offering rebuilt RTC LA-306's with the new Discrete Digital control system in 2012. See new LA-306 and refurbished RTC LA-306.

9.5-inch (240 mm) belt. Built by RTC and LCI, 9-inch furnaces are built in many configurations including single chamber LA-309 through the large for chamber 8-9 zone S-1209H hydrogen furnaces. 9-inch furnaces are available in every series and offer a good balance between economy and production throughput.  LCI builds 9-inch furnaces with computer control as well as in a Production (P) configuration with its newly designed Discrete Digital control system.  The P-series offers tight temperature control without the continuing updates and obsolescence associated with a PC and Microsoft operating system. See LA-309, LA-309P, TF-series and S-series furnaces.

9.5-inch (240 mm) belt (see 9 inch).  Built by RTC, 10" furnaces were offered in almost every furnace series.  These 10-inch furnaces were all built with 9.5 inch belts and were rebranded as 9-inch furnaces sometime aroung 2005.

14-inch (355 mm) belt. Built by RTC, 14-inch furnaces were primarily built for solar cell applications, most often in one and two chamber configurations.  PVD-series are solar cell furnaces with a low temperture dryer before the furnace sections.

15-inch (380 mm) belt.   Built by RTC and LCI, 15-inch furnaces are built in many configurations including single chamber LA-309 through the large for chamber 8-9 zone S-1215H hydrogen furnaces. 15-inch furnaces are available in every series and offer high production throughput.  LCI builds 15-inch furnaces with computer/PLC control.   A few can be built with the Production (P) configuration replacing the furnace computer with LCI's newly designed Discrete Digital control system. See TF-series and S-series furnaces.

24-inch (610 mm) belt.   Built by RTC and LCI, 24-inch dryers are manufactured for optical curing and other low temperature (80-500C) precision heat treating or curing  applications.  Dryers can built in 2 to 5 chamber configurations, one temperature zone per chamber.  See D-series dryers. 

36-inch (915 mm) and 48-inch (1220 mm) belt.   Built by RTC, 36-inch and 48-inch furnaces were built in a number of large dryer configurations offering 80-500C large surface curing up to 36 or 48 inches wide.