The basic version with the beta-gamma detector is designed for the measurement of contaminations on surfaces and objects in the medical radionuclide laboratories. The Xenon filled sealed large area proportional counter is especially sensitive to beta- and photon emitting radionuclides. Calibration factors for many nuclides among of them C-14, Na-22, P-32, P-33, S-35, Cr-51, Co-57, Fe-59, Co-60, Sr-85, Sr-90, Tc-99m, I-123, I-125, I-131, Cs-137, Tl-201, Tl-204 and Am-241 are internally stored. After selection of the radionuclide by the user the LB122 measures surface contaminations and displays them in Bq/cm².

• The version with the butane filled large area proportional counter is capable of alpha- and beta-detection and well suited for applications with alpha-emitters for instance in nuclear industry. Detection limits of both versions are sufficiently low to detect contamination levels according to radiation protection regulatory requirements within short times.
  
  
• In combination with wall bracket and counting gas supply unit the portable monitor LB122 becomes a semi- stationary instrument for monitoring personal contamination at exits of controlled areas.