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Rotunda Scientific Technologies
GMS312 Rolling Core Spectral Analyzer
The GMS312 Core Analyser is a Rolling Gamma Spectrometer designed to detect naturally occurring gamma radiation. Cores from 3.5 in. to 12 in. can be accommodated.

“…on site core analysis allows the operator to make effective, real-time assessments of the well site.”

The GMS312 offers the ability to log elemental concentrations of Uranium, Thorium, and Potassium by means of spectral analysis of gamma emissions from core materials. Data can be displayed in either API units or counts in six user defined Regions of Interest plus gross gamma count.

There two measurement modes; either Dynamic or Static. In the Dynamic mode, continuous measurements are made whilst the GMS312 is rolled along the core at a preset speed. In the static mode, the GMS312 is moved to each location and a static measurement made. In each mode, the depth is displayed.

Survey results are saved to the internal memory of the instrument, so that they may be downloaded and analyzed on a PC via the Core Analyzer Application software.
Designed by Rotunda Scientific Technologies™ LLC © 2012-2018
GMS312 Spectral Core Analyzer
Rolling Core Gamma Logger
  • Rolling Spectral Core Gamma Logger
  • Handle for comfortable operation
  • API units
  • Plot of Units vs Depth in Dynamic mode
  • Factory Pre-set Regions of Interest: Potassium, Uranium, Thorium & Total Gamma (KeV)
  • 3 additional optional user defined Regions of Interest
  • Data Logging
  • Background Correction
  • Metric, Imperial or US units
  • Preset rolling speeds in Dynamic mode from 25 to 1000 mm/s (1 to 39.4 inches/s)
  • Preset measurement intervals in Static mode from 25 to 1000 mm (1 to 39.4 inches)
  • Preset sample periods in Static mode from 10 to 900s

  • Log Elemental Concentrations of Uranium, Thorium, and Potassium 
  • ​On-Site Core Analysis
  • Accomodates Cores From 3.5 in. to 12 in.
Display                        480 x 72 pixel Transflective LCD with                                        white LED backlight
User Controls             Power ON / OFF
                                     Back / No
                                     Up / Down
                                     Left / Right
User Connections      Charging Input
                                     USB type B for connection to a PC
Memory                       8 GB Internal Memory
PC Software                Core Analyzer Data Manager included
Power                          Internal NiMH 7.2 V 6000 mAh battery
Power Supply             Input supply 110 to 240 V ac, supplied                                      with world-wide connectors
Detector                      72 x 72 mm (2.8" x 2.8") NaI(TI)
Energy Range             90 keV to 2,800 keV
Temperature               Operating range -10˚C to 40˚C
IP Rating                     IP54
Dimensions                320L x 320H x 150W mm
                                    12.6"L x 12.6"H x 5.9"W
Total Weight               15 kg
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