Hangzhou Yong Hee Photonics Co.,Ltd was founded in 2001.It lies in the beautiful city-Hangzhou and is devoted to the manufacturing and development of scintillation crystals/detectors: Ce:YAP, Ce:YAG, Ce:GAGG, Ce:LuAG, CsI(Tl), CsI(Na), CsI(pure), NaI(Tl), GOS, BGO, LYSO(Ce),YSO(Ce), LaCl3(Ce), LaBr3(Ce),CaF2(Eu), BaF2, PbWO4, CdWO4, PbF2, CeF3, Plastic detector, LiI(Eu), Silicon photomultipliers, Photomultiplier Tubes.We have gone through 23 years and owned a good team and advanced instruments.We are being widely involved in medical imaging,nuclear physics,food safety testing,oil well survey,cargo safety inspection,aerospace,all kinds of ray detectors.