PGC is dedicated manufacturing the highest quality climate controlled systems for scientists and engineers. PGCs primary focus is precise humidity control. Parameter Generation & Control (PGC) was founded in 1977 to pro......PGC is dedicated manufacturing the highest quality climate controlled systems for scientists and engineers. PGCs primary focus is precise humidity control. Parameter Generation & Control (PGC) was founded in 1977 to provide equipment for research, testing, or quality/process applications requiring environmental simulation and control within extremely narrow tolerances. PGC is committed to continuing development of quality environmental simulation and control products. Achieving and maintaining very precise relative humidity (RH) -AND- temperature control distinguishes PGC from its competition. PGC produces three categories of environmentally controlled equipment. 1) Reach-in Chambers provide dependable performance wherever there is a requirement for very stable temperature and humidity. The RH and temperature are controlled to within +0.5% RH and +0.1°C respectively. 2) Conditioning Systems are manufactured and configured for operation with modular walk-in rooms, existing building spaces, or manufacturing processes. 3) Walk-in Rooms are modular-paneled rooms used in combination with PGC’s conditioning systems. Relative humidity constancies of +0.5% and temperature constancies of +0.1°C can be obtained in rooms as large as 30,000 cubic feet. All our products are planned, designed, and manufactured by PGC, resulting in a complete RH/temperature solution.