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.