PHDS Co. is a small company based in Knoxville, TN focused on developing and manufacturing the next generation of portable, mechanically cooled high purity germanium (HPGe) detectors. Germanium is the only detector material with sufficient energy resolution to reliably identify gamma-ray emitting radioisotopes and unambiguously distinguish between special nuclear material, industrial and medical sources. 

For 20 years PHDS Co. has specialized in designing and manufacturing the lightest weight HPGe spectrometers to allow for the rapid detection and characterization of radioactive material in-situ. In addition to the commercial line of detectors, PHDS Co. also builds customs detectors for novel applications. 

The GeGI gamma-ray Imager is an imaging spectrometer that redefines how an area can be rapidly characterized and surveyed. By combining high resolution spectroscopy and radiographic imaging, the GeGI rapidly identifies, locates, and quantifies radioisotopes in real time. The Fulcrum line of hand-held HPGe spectrometers provides rapid detection, identification, and quantification of radioisotopes in the field or in a shielded enclosure in a laboratory. With a simple user interface, both novice and experienced users now have access to high energy resolution spectroscopic data. 

PHDS Co.’s products are utilized in a wide range of applications from nuclear security, border control, decommissioning, nuclear waste cleanup, D&D and nuclear power. There is a substantial global installed base of PHDS Co. products.