HPG-100 high purity germanium γ-ray spectroscopy detector is specialized for on-site detection of radiation developed by Suzhou Weimu. Equipped with high-resolution probe and multichannel analyzer, it can identity γ-ray and its activity. HPG-100 is consisted of probe, liquid nitrogen cooling, digital multichannel analyzer and analysis software, measuring gamma rays and activities of radionuclide in various forms including water, soil, solid, aerosol and fallout.