The RDS GPS Scintillometer is a dual-purpose gamma-radiation monitor that measures the external gamma count rate (c/s) and the external gamma dose rate (Sv/h) using a 1″ × 1″ NaI(Tl) crystal. It is typically used by a geologist to assess a gamma count-rate “signature” of uranium mineralisation and the count rate of uranium ore cores and ore-chip samples. It also offers first-level radiation-protection information: the geologist can estimate personal gamma-radiation dose based on the measured external gamma dose rate.
When an external GPS antenna is connected, the reading number, the coordinates, and the gamma count rate are logged into the internal memory. The distance in metres between subsequent monitoring/logging positions is programmed when the scintillometer is in programming mode. During a survey it is possible to set an alarm count-rate (c/s) level using two momentary switches.
Logged data can be downloaded into a MS Windows Hyperterminal as a text file that can be opened in MS Excel.