Polk Audio, 11500 Cronridge Dr, Owings Mills, MD 21117, US

Air Techniques International (ATI ) is a division of Hamilton Associates, Inc, a privately owned Baltimore manufacturing firm comprised of several specialty businesses. Hamilton Associates, Inc was established in 1951 by two brothers and continues to be family owned and operated ; exhibiting the same professional and time-honored principles of its founders. The ATI division is a well diversified business that maintains a variety of market balances: domestic and international customers, government and commercial business, and sales of equipment and instrument service. We pride ourselves on being a group of professionals bound by the common belief that the path to success is absolute dedication to customer service. This proven approach is the sole driver and basis for ATI's solid reputation and industry presence. Since 1961 ATI has been the leading designer and manufacturer of specialized test equipment for high efficiency particulate air (HEPA ) filters, ultra low penetration air filter (ULPA ) media, filter cartridges and respirators used by virtually all government, military and commercial organizations worldwide. ATI is considered a leader in our core technologies of aerosol generation and forward light scattering photometric detection. In addition, ATI is ISO 9001 -2008 certified. ATI manufactures a comprehensive line of test equipment from small portable units for on-site certification to the largest systems used by major producers and testing laboratories for testing filters and respirators. We also specialize in the design and manufacture of customized equipment for research, testing and quality assurance of air filtration systems. ATI test equipment is used by the world's leading corporations and institutions where particle free air is essential. The industries we serve include:

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