Nuclear radiation
Semiconductor detectors
and Associated electronics

Gamma-Radiation CdZnTe Micro Spectrometer


Gamma-Radiation Micro spectrometer μSPEC is a very compact high performance device with changeable CdZnTe detection modules. The μSPEC is based on application of high-sensitivity room temperature operating CdZnTe semiconductor detectors and miniature multi channel analyser MikroMCA527 (GBS Elektronik GmbH). The μSPEC allows measurements of gamma-radiation spectra and storing it for processing in a PC via USB port. The changeable detection modules contain the high quality CdZnTe quasi-hemispherical detector of volume 60 mm3, 500 mm3 or 1500 mm3.

The μSPEC is a self-sufficient device and consists of the CdZnTe detector, charge sensitive preamplifier, main amplifier, digital signals processor, high and low voltages power supplies and computer interface. It is communicated and powered from the PC via USB port.

The μSPEC is operated and entirely compatible with the Windows based GBS MCA166/MCA527 WinSPEC software.


  • Very compact
  • Changeable CdZnTe detection modules
  • Digital pulse processing
  • High energy resolution
  • High efficiency
  • High count rate capability
  • USB powered
  • Minimal power requirements
  • Easy-to-use


  • Gamma-radiation spectroscopy
  • Environmental monitoring
  • Nuclear power plants
  • Monitoring of nuclear material flow
  • Home land security



  • Detector type CdZnTe quasi-hemispherical detector
  • Detector volumes
    • µSPEC6060 mm3
    • µSPEC500500 mm3
    • µSPEC15001500 mm3
  • Energy range 20 keV to 3.0 MeV
  • Energy resolution
    • µSPEC60, µSPEC500< 2.5%
    • µSPEC1500< 3.5%
  • Maximal throughput > 100 kcps
  • Number of channels 128, 256, 512, 1024, 2048
  • Integral non-linearity < 0.3%
  • Shaping equivalent adjustable in the range 0.1 … 2 µs
  • PZC adjusment automated
  • Power supply USB, 4.5 V … 5.25 V, 100 mA max
  • Connector Micro USB, A or B type


  • Dimensions 25 mm x 25 mm x 72 mm
  • Maximal weight 80 g

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