The use of miniature Stirling electric coolers (EC) has made possible the application of high purity germanium (HPGe) detectors in spectrometers intended for space projects, field operations and mobile radiation monitoring systems for remote radiation monitoring, among other applications. The development of spectrometer systems requires mechanical, thermal and vacuum solutions to be applied during the design and manufacturing phases of the cryostats for HPGe detectors. These solutions determine the efficiency of the detector cooling, the time taken to cool down the detector, the level of mechanical vibrations, which impact the energy resolution of the detector, especially at low gamma-ray energies, the reliability and its operational life.