As of August 31, 2015, Engineered Products Co. was acquired by Donaldson Company, Inc. Engineered Products Co., doing business as Filter Minder, designs, manufactures, and supplies filter monitoring devices. The company offers a line of filter monitors, including indicators, switches, and sensors that are used to monitor air and fuel filters in automotive, truck, off-highway vehicle, military vehicle, construction, agriculture, compressors, blowers, hydraulics, lawn and garden, and irrigation industries. Its products include visual/mechanical indicators that monitor the condition of engine air filters, fuel filters, or other low vacuum/pressure applications; visual/electrical switches that monitor the condition of engine air filters, fuel filters, or other low to medium vacuum/pressure applications; electronic pressure sensors that monitor various vacuum or pressure conditions ranging from cabin pressures to air or fuel filter restriction levels; and accessories and related products, including LED displays, custom fittings, mounting brackets, hoses, and grommets. The company markets its products through a network of distributors worldwide. Engineered Products Co. was founded in 1977 and is based in Waterloo, Iowa.