GMS310 Core Gamma Logger Side View
GMS310 Core Gamma Logger Side View
GMS310 Core Gamma Logger Top View
GMS310 Core Gamma Logger Front View
GMS310 Core Gamma Logger Back View
GMS310 Core Gamma Logger Dust Cap opened
GMS310 Core Gamma Logger with carrying case
GMS310 with Accessories

GMS310 Hand-Held API Core Gamma Logger

Portable, Easy to Use, and Built to Last.

The GMS310 Hand-Held Gamma Spectrum Core Logger is ideally suited for the user that requires API reporting, 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. The GMS310 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.​

Detector51 x 51 mm (2" x 2") Nal(TI)
Energy Range90 - 2,700 keV
Regions of InterestPotassium, Uranium, Thorium
+ 3 additional customizable regions
API-200 ReportingYes
Power2 NiMH 4000 mAh 'C' size batteries
~12 hrs. operation at 20°C
Full charge in ~10 hours
IP Waterproof RatingIP 54
Included with Purchase> Rugged carrying case
> Rechargeable batteries & battery charger
> USB cable and PC software

API Reporting

This instrument was built specifically to serve the Oil & Gas industry and offers API Reporting.

Rechargeable & Replaceable Batteries

When the instrument runs out of battery, you can recharge the existing stock or simply replace them with a new set!


The GMS310 is a hand-held instrument that comes with a carrying case that can be carried or shipped virtually anywhere.

PC Software

The PC Software allows you to analyze the trends among the measured data to help your core analysis team.

Why Choose Rotunda Scientific Technologies?

Worldwide Shipping

Are you outside the USA? No problem, we work with international customers every day!

Post-Purchase Support

We recognize that you are key to our success and we will stick with you beyond the purchase process.

Product Warranty

Most of our products include a 1 year warranty, including the GMS310!

Frequently Asked Questions

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