In the Western PA area there are two calibration vendors that I am aware of: Applied Health Physics Bethel Park, PA 15102-0197 412-835-9555 and GTS Instrument Services 2045 Rt. 286 Pittsburgh, PA 15239-2839 412-733-1900 CMU uses GTS and except for the neutron area they can probably do everything you asked for. We have never used AHP so it is difficult for me to give a comparison of services. Pete C.