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GR1 – Gamma Ray Spectrometer

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  • High spectral resolution
  • High efficiency
  • USB powered
  • Compact
  • Simple to use

The GR1 is a high-performance gamma ray spectrometer utilizing a 1 cm³ CZT detector. It is completely self-contained, with built-in preamplifier, shaping amplifier, baseline restorer, pulse height digitizer, and HV supply. The digitized pulse heights of detected gamma-ray signals are sent to a PC via the USB. The unit is powered entirely from the USB bus, so no external power supply is needed. The K-spect software included with the GR1 spectrometer provides the spectrum acquisition, display, analysis, and storage

MAS-001 –  MultiSpect Analysis software (Qualitative). Note: One license per PC.
MAS-002 –  MultiSpect Analysis software (Quantitative / Qualitative). Note: One license per PC.
SW-001  –  Windows/Linux driver hardware between Kromek product and customer software inc email/tel support
GR1-SHIELD – Tungsten Shield and 3 collimators 8,6 kg for In-Situ measurements
GR1-ACC – Carbon fiber tripod & carrying case

Avaialble as;
GR1, with resolution < 2.5%
GR1+, with resolution < 2%


Stefan Isaksson


Technical specification

Detector: 10 x 10 x 10 mm CZT coplanar-grid detector
Energy range: 30 keV to 3.0 MeV
Energy resolution: 2.0 – 2.5% FWHM @ 662 keV
Photon sensitivity: 6,5% at 662 keV
Electronic noise: <10 keV FWHM
Maximum throughput USB: 30 kcps
Number of channels: 4096 (12 bit)
Differential non-linearity: < ± 1%
Integral non-linearity: < ± 0.02%
Power consumption: 250 mW
Dimensions: 25 x 25 x 63 mm
Weight: 60 gram
Temperature range: 0-50º C
Analysis Software: K-spect, Included and free to download

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