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Personal Contamination Monitor

  • Personal Contamination Monitor
  • Personal Contamination Monitor
  • Personal Contamination Monitor
  • Personal Contamination Monitor
  • Personal Contamination Monitor


Radionuclides are widely used in many fields of research, nuclear medicine and in life science. Wherever unsealed radioactive materials are used, radiation protection regulations require contamination monitoring for hands, feet and clothing.

The hand-foot monitor LB 147 is based on innovative scintillation detection technology for the measurement of radioactive contamination. The instrument can be used as a monitor for simultaneous measurement of alpha and beta/gamma contaminations  or even as an alpha monitor or beta/gamma monitor. The results can be represented in freely selectable units Bq/cm² or in cps.

The LB 147 has a removable hand probe for clothing measurements. A personal ID is possible by means of an optional card reader or transponder.


  • Low-maintenance ZnS(Ag)-scintillation detectors
  • Space-saving design
  • High detector efficiencies
  • Removable hand probe for clothing measurement
  • Simple operation with graphic display and touch display
  • USB, Ethernet, RS 232 and RS 485 interface
  • Service functions (plateau, calibration, systematic test,…)
  • Permanent data memory for 10000 measuring data
  • Extensive nuclide library
  • Card reader/transponder for access control (optional)
  • Double password hierarchy
  • Voice output: voice instructions, if activated, are output by the monitor

The operation of the LB 147 is very easy by means of the touch panel on the graphical display and the clearly arranged menu structure. In addition, a voice output can be activated to get voice instructions by the monitor.

The monitor can be switched easily between different lead nuclides before the measurement.

Each detector has its own calibration factor for each nuclide and a spillover factor for each alpha nuclide. The input of all parameters is password protected. Calibration factors for more than 50 nuclides in accordance with DIN ISO 7503-1 and A-100 (DIN 44801) are already existing in the software.

The background radiation is continuously monitored for each detector and used to compensate the measurement with the long-term average background value. Before the start of each measurement the background is checked for fluctuations.

The detection limits are calculated according to DIN ISO 11929 for each measured value and will be stored together with the measurement values.

The LB 147 complies with the requirements of the international standard IEC 61098. This is true in particular for the detector performance, the manufacturers’ calibration procedures and the determination of efficiencies.

Numerous service functions permit easily measurements for necessary periodical tests. These include automatic plateau measurement, calibration routines for all detectors and a fast system test.

Up to 10000 measuring data can be stored and transferred via USB, Ethernet, RS 232 or RS 485 to an external computer. A simple communication protocol permits the integration into a measuring network.

As an option, a alarm column, transponder, card reader or printer can be connected. If requested, a gate can be released if no contamination is detected.

 The hand-foot monitor is also available as LB 147 Slim with a changed positioning of the hand probes.



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