The world's smallest and highest resolution room temperature gamma ray spectrometer - for users that need extra output channels

The GR1-A is the advanced model of the GR1, a high-performance gamma ray spectrometer, containing auxiliary input/outputs that greatly increase operational flexibility. These allow the GR1-A to be tailored for specific applications in nuclear research and academia. Three MCX connectors provide energy and timing outputs and gate inputs.

The GR1-A is supplied with a licence for MultiSpect Analysis software, a unique application that allows connection of multiple GR1-As to a PC and has the ability to display multiple spectra; both live and saved from previous measurements. It provides the spectrum acquisition, display and storage functions, and the export of data for further analysis as well as match spectra to a pre-loaded library of over 400 radionuclides.

GR1-A - CZT gamma ray spectrometer

Main Features

  • Operational flexibility
  • MCX connectors
  • Analogue energy output
  • Timing output
  • MCA gate input
  • High spectral resolution
  • High efficiency
  • Compact
  • Simple to use
  • CZT solid state detector
  • USB powered
  • Low power consumption

Product Benefits

  • Can be used straight out the box or built into your own device
  • Can be mounted together with other devices side by side in an array to give you coverage of a larger area
  • Powered entirely through the USB bus, so no external power supply is needed

Product Specifications

  • Energy resolution: < 2.5% FWHM @ 662 keV
  • 1 cm cubed CZT detector
  • USB output
  • Three MCX connectors that provide energy and timing outputs and gate inputs
  • MultiSpect Analysis spectroscopy software included in the price

Find out more about the GR1-A Gamma-Ray Spectrometers

Download the GR1 family brochure

A PDF with the complete specification for the GR1 family.

Speak to our experts about the GR1-A

Make sure the GR1-A meets your needs and your budget


For users who are working in a multi source environment and need a better resolution, the GR1-A Plus (+) is available. The plus model shows a better resolution for users who have a lot of different sources and need to differentiate between them easily. The GR1-A+ very accurately defines the source and the quantity of the source while in the environment/field.

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