LB 147 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 due to that it is possible to measure alpha and beta/gamma contaminations simultaneously. The results can be represented in freely selectable units Bq/cm² or in cps.
 

Tabs

Features
  • 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 1750 measuring data
  • Extensive nuclide library
  • Card reader/transponder for access control
  • Double password hierarchy
Details

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. 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.

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 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 1750 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.

Two optional external signal lights indicate the state of operation and/or exceeding of an alarm threshold. If requested, a gate can be released if no contamination is detected.

Specifications

 

Measuring Electronics
Compact and energy efficient microprocessor electronics
Program in Flash memory allowing easy program update
Real-time clock
Connection up to 6 probes with +5 V supply
Standard norm pulse output and control signal for probe high voltage
Input/Output: 4 digital inputs, 6 control voltages
2 serial interfaces, 1st as RS 232 or RS 485, the 2nd as RS 232 connection for a card reader/transponder
Ethernet and USB (slave) interface
3 relays with change-over contacts for mains switching of external light beacons or exit barrier

 

Mechanical Data
Dimensions (without alarm tower)65 cm x 125 cm x 80 cm (W x H x D)
Weight25 kg

 

Instrument Mains Supply
Power supplyWide range input 85 – 264 VAC, 47-65 Hz
Power consumptionapprox. 7 W
Fuse2A

 

Hand Detectors
DetectorZnS(Ag) scintillator with light-tight Hostaphan foil
Entrace window´s dimensions150 mm x 230 mm
Sensitive area345 cm²
Transmission protective grid80 %
Typical efficiencies according to ISO 7503-1:
14C20 %
36Cl50 %
90Sr/90Y52 %
241Am33 %

 

Foot Detectors
DetectorZnS(Ag) scintillator with light-tight Hostaphan foil
Entrace window´s dimensions150 mm x 370 mm
Sensitive area555 cm²
Transmission protective grid72 %
Typical efficiencies according to ISO 7503-1:
14C21 %
36Cl54 %
90Sr/90Y43 %
241Am19 %

 

Ambient Conditions
Temperature range-5 °C to +40 °C (operation)
Relative humidity0 % to 90 % (no condensation)

 

Accessories
Accessories optional                                                                               Ident. No.
Mobile Version Kitfor moveable version52874
Transponder system (RFID)for person identification59496
Transponder Chip/Cardfor transponder59495/59503
Card readerfor person identification49052
Magnetic cardfor card reader34481
Alarm columnSignalization of device status and contamination54693

Calibration sources
 

36Cl, approx. 1 kBq
241Am, approx. 1 kBq

29336
25509

HFK-ProgramAcquisition of measured data into Access-DatabaseUMAD HFK

 

Applications

The LB 147 is used in:

  • Radionuclide Laboratories
  • Nuclear Facilities
  • Environmental Measurement / Homeland Security
  • Nuclear Medicine
  • PET Facilities

 

Download
Brochure
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LB 147 en PDF 393.46 KB