Assay Technology was founded in 1981 and is based in Pleasanton, Calif. The company manufactures and markets chemical exposure monitoring systems to address environmental and occupational health concerns. Assay Technology also provides analytical laboratory services and monitors to sample for more than 223 Occupational Safety and Health Administration-regulated chemicals. In February 2004, the company acquired the respirator cartridge and canister test facility of Miller-Nelson Research of Monterey, Calif. his acquisition positions Assay Technology to assume a position as one of the leading independent laboratories for the evaluation of cartridges and canisters used in air-purifying respirators.

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