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ACS
Since 1932, the name Angelantoni has always been synonymous with the advanced cold technology in both research and industry. In 1952 the production of environmental chambers for temperature and humidity started, rapidly followed by the first temperature vacuum chamber. At the Milan International Fair in 1961, Angelantoni exhibited the first refrigeration unit in Europe that could cool below -100ºC (-104ºC) using traditional compressor techniques without any cryogenic fluids. In 1988 the design and production of the first space simulator (vacuum down to 10 exp. – 7 mbar); in 2004 the first automated freezer at -80ºC. The group consists today of about 600 employees working in 7 units.

Angelantoni Industrie Spa, is located in Massa Marta (Perugia), Italy, designs and manufactures:-

• Environmental Test Chambers, Stress Screening Systems and Space Simulators (ACS Environmental Division).
• Equipment in the field of cold technology applied to laboratories of biological research, universities, hospitals (AS Biomedical Division).
• Coolant plants for industrial processes and cold stores for perishables, preservation (AG Industrial Cold Plant Division)

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ESS
Environmental Stress Systems Inc. grew out of Step Electronics Inc. in Campbell, California which was established in the 1980’s as an international microwave component supplier. When the founders saw additional opportunities in diverse markets, the company was expanded into several new divisions. One of the divisions began manufacturing standard and custom thermal platforms in 1987. Eventually, each new division was set up as separate company. ESS inc was established in 1989 as a spin off from Step Electronics by the environmental test equipment design and manufacturing personnel. The business was moved to Sonora, California where is it located today. Over the years the product line has expanded to provide an array of environmental stress screening products for commercial, automotive, aerospace and military electronics industries.