美国AlphaLab  www.trifield.com
AlphaLab Incorporated was founded in January 1993 by Bill Lee, a Ph.D. in Physics (Superconducting Electronics, 1986) in Salt Lake City. Originally the company manufactured various electronics, including the TriField Meter (which reads a combination of electromagnetic fields). Over the years, a number of other standard meters were added, as well as custom designs. At present, there are approximately 20 employees occupying two adjacent buildings in downtown Salt Lake City.