PC based Five Channel combined Gross Beta & Gamma Ray Spectrometer System FC1005 manufactured and supplied by Nucleonix systems is primarily designed to study natural rock and geological samples for the assay of atomic minerals namely of U-238, Th-232 & K-40.

The complete PC Based electronic system comprises of the following constituent units.
- 5” dia X 4” ht NaI detector with preamplifier
- Pancake Detector assembly for Beta
- Minibin & Power supply MB 403
- High Voltage Unit - HV502
- Quad SCA
- Six channel Data Acquisition Card
-Beta Channel counting card
- 4” Lead shielding
- Personnel computer system with software.

Gamma detector used in this system is a large area NaI detector assembly (5” dia X 4” ht) which is mounted vertically upwards to facilitate sample placing on the top. Samples are processed, Prepared and placed in a circular aluminium container of 5” dia X 11/2” ht. Over the sample, Beta detector assembly comprising of three pancake detectors with the detector windows facing the sample are mounted suitably and the signal from this is taken to Gross Beta Counting card sitting inside PC.

NaI Detector is biased by High Voltage Unit HV502 the output of this is fed to spectroscopy amplifier SA 524 for further amplification. This inturn is fed to a Quad Analyser SCA 641 for selecting energy windows.

Output from the Quad Analyser SCA 641 is fed to six channel counting card sitting inside PC. Under programme control this card counts, stores and displays the data.

Software developed in VB under Windows platform has menus designed to very user friendly. System generates report which gives complete assay of K, Th, & U present in the sample in PPM or Percentage.