Manufacturer and distributor of analytical instruments and automated analysis systems for water and wastewater treatment process control. Brand name products manufacted by the company in Waukesha Wisconsin include ChemScan, ActivTrac and ChemScan mini. These products detect chemical and optical parameters including nutrients, metals, halogens, color and light transmittance using UV-Visible Absorbance Spectrometry. Brands distributed by ASA include Cogent Environmental (dissolved metals analysis), Modern Water (water borne toxicity analysis and alarms) and AppliTek Scientific Instruments (compliance and organics analysis using digestion and titration).