The leaders in environmental test equipment service ... Perry & Associates has over 35 years of experience in the field of environmental simulation test equipment and service.  Whether it's a benchtop unit, a walk-in, or a drive-in chamber, we can provide virtually any service related to environmental test chambers and associated control equipment. We offer the following services on all makes and models, including ESPEC, Thermotron, Russells, Tenney, Envirotronics, Blue M, Solo, Weiss, Despatch, Bethlehem, and many others: Chamber installation & start-up Repair of refrigeration, electrical, & control components Calibration & preventive maintenance Chamber relocation - one chamber or a whole laboratory Refrigerant conversion - replace obsolete types with EPA-approved HFC/HCFC's Personnel training on equipment use and basic maintenance Consultation - equipment purchase, test profiles, lab or chamber set-up/relocation, and more Chamber rebuilds and performance upgrades Click "Services" at left for more information.