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Gamma Spectrometry
GMS 310 Spectral Gamma Core Logger Spectrometer with API-200

The GMS 310 Spectral Gamma Logger is ideally suited for the user that requires easy operation and rugged reliability. This is especially useful in the geophysical field of well or borehole logging and also other industrial applications such as the scrap metal recycling sector. Three Regions of Interest (ROI) are pre-programmed from the factory with a total of 6 ROIs allowing the user to preset specific radionuclides important for your investigative or operational environment. With the GMS 310 you don’t need to be a physicist to understand the results, as is common with more complex units that provide spectrum data for radionuclides unimportant to your operation. The GMS 310 comes preset with commonly used radionuclides, such as Uranium, Thorium and Potassium. In addition to the 6 ROIs the unit uses an additional region covering the entire energy range for overall gross measurements.​

Operation of the GMS Core Logger is accomplished through the use of the 6 large buttons that are easily operated even while wearing gloves or PPE. The buttons are color coded into function groups for power:

  • Red - On/Off
  • Yellow - Backlight
  • Blue - Up/Down
  • Green - Accept
  • Red - Decline

In addition to the large buttons, the display has a bright backlight to for easy operation in bright sun light or lighting conditions. The backlight on/off timing is adjustable via the menu.

With the large 51 x 51 mm (2 x 2 in) NaI detector the GMS 310 provides quick isotope detection and identification times to increase worker efficiency and eliminate wasted time. Sampling time is selectable via the onboard menu. Data is stored in the instrument and the measurements can be extracted to a PC with the weatherproofed enclosed USB connector. Behind the weatherproof enclosure is also the power recharging jack.

Included with Purchase

A rugged case, rechargeable batteries, battery charger, USB cable and PC software are included and complete the GMS 310 package making the unit ready to use out of the box (after fully charging the batteries). 
Gamma Spectrometer Storage Case
GMS Battery Access Cover
GMS Dust Cover
   GMS310 Storage & Travel Case                 GMS310 with Accessories
        Battery Access Cover                        Dust Cover over USB & Power
GMS 310 Gamma Spectrometer
GMS 310 Spectral Gamma Core Logger
​Hand-held Gamma Spectrometer with API-200 Reporting
  • 51 x 51mm (2" x 2" NaI Detector)
  • 6 ROIs with API-200 & 1 Total Integral
  • 3 User Settable Preset ROIs
  • Simple Menu / 6 Key Operation
Gamma Spectrometer with Accessories
  • Designed for Rugged Environments
  • USB Data Output with Cable
  • Rechargeable Batteries
GMS Case
GMS Spectral Gamma Logger Specifications
Display                         128 x 64 pixel Transflective LCD
                                      with white LED backlight
User Controls              6 button operation:
                                      Power ON / OFF
                                      Back / No
                                      Accept / Yes
User Connections       Charger Input
                                      USB Type B for connection to a PC
Detector                        Large 51 x 51 mm (2" x 2") Nal(TI)
Energy Range              90 to 2,100 keV
Power                           2 NiMH 4000 mAh 'C' size batteries
                                      ~12 hrs. operation at 20°C
                                      Full charge in ~10 hours
Charger                        Input Supply 110 to 240 V AC,                                                 supplied with worldwide connectors
Temperature                Operating Range: -10°C to 50°C
                                                                  (14°F to 122°F)
                                      Slowed Display   -20°C to 60°C
                                      at lower temps:    (-4°F to 140°F)
IP Rating                      IP 54
External Dimensions   330L x 150H x 90W mm 
                                      (13"L X 5.9"H X 3.5"W)
Weight                          1.9 kg (4.2 lbs)
Transport Case            (Transport case details may vary)
Dimensions                 500L x 210W x 390H mm
                                      (19.7"L x 8.3"H x 15.4"W)
Total Weight                7.5 kg (16.5 lbs) with GMS310 and                                             accessories
Serving the External Dosimetry, Radiation Detection, and Spectroscopy communities since 2012.
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