US Nuclear Corp., formerly APEX 3 Inc., provides a range of radiation detection equipment and services. The Company operates through two segments: Optron and Overhoff. Optron is located in Canoga Park, California and Overhoff is located in Milford, Ohio. It designs and manufactures nuclear radiation detection and safety equipment, survey meters, air and water monitors, port security equipment and tritium air monitors. The Company's products consist of radiation water monitors, tritium monitors, air and water monitors, nano-second x-ray monitors, and vehicle, personnel, exit and room monitors. The Company also offers handheld survey meters/dosimeters, and port security equipment, along with supporting software and services. Its two divisions consisting of Optron Scientific Company Inc., doing business as Technical Associates, and Overhoff Technology Corporation (Overhoff) offer over 200 products that service and address the nuclear power industry, domestically and internationally.