Started in 1987, Logical Products Inc. LPI is a contract-manufacturing company providing test programming and calibration services in the United States. Located in Gurnee, Ill., it specializes in offering PCB (printed circuit board), electro-mechanical, mechanical and control panel assemblies. The firm caters to various industries, such as telecommunication, data acquisition, construction equipment, water\ chemical, instrumentation, oil\ gas, x-ray material analysis, medical, pharmaceutical, automotive\ RV and printing. Logical Products Inc. LPI is an ISO 9001 registered company.