Alicat Scientific, Inc.: pressure controller
The Model GC12-4CH is a four-channel pressure gauge and control device that is designed for industries such as semi-conductor, material handling, laboratory, medical equipment, aerospace, processing, and industrial equipment. Features include four independent pressure meters, control valves, and bleed valves with an integral field programmable PID loop controller. A choice of either analog or digital communication is available. Pressure control ranges from negative to 100 psig with +0.25% accuracy and 0.1% stability, according to the manufacturer.
—Alicat Scientific, Inc.