The Gamma ray In Situ Portable Instrument (GISPI) was used in the radiometric survey the West Coast Fossil Farm (Bezuidenhout,2015). The GISPI consists of a NaI(Tl) scintillation detector, a digital Multi Channel Analyser (MCA), a rugged tablet PC with an onboard GPS and real time analysis software that also controls the whole system (see Fig. 1). The NaI(Tl) detector (7.62 7.62 cm) is coupled to the MCA and sealed in a padded case to protect the instruments from mechanical shock and dust. The scintiSPEC® MCA (http://gs.flir.com/) that is produced by FLIR® has a USB connection that acts as the power source for operation and allows data transfer.
A Trimble® Yuma rugged tablet PC (http://www.trimble.com/) with on-board GPS manages the systems and stores the data.