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.

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.
 

Also available as LB 147 narrow-version.

Tabs

Features
  • 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
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. 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 narrow-version with a changed positioning of the hand probes.

Specifications

 

Electronics
CPUNXP i.MX 6 ARM Cortex-A9 Windows Embedded Compact 2013
DisplayColoured 7" Touch Panel, 800 x 480 pixels
Ports5 USB (Host), 1 USB (Device), 1 Ethernet 10/100/1000Mb, 1 RS232, 1 RS485
External signal transmitters3 relays max. 50 V, 5 A
Power supply100 - 240 VAC wide-range input, 50/60 Hz
Power consumptionabout 14.5 W
Fuse2 A

 

Mechanical Data
Dimensions (without alarm tower)65 x 125 x 80 cm³ (W x H x D)
Weightapprox. 25 kg

 

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 background

α-channel

β-channel

about 0.1 cps

about 15 cps

Typical efficiencies

(ISO 7503-1)

14C

36Cl

90Sr/90Y

241Am

20 %

49 %

52 %

33 %

Typical MDA

(ISO 11929)

14C

36Cl

90Sr/90Y

241Am

0.649 Bq/cm²

0.135 Bq/cm²

0.126 Bq/cm²

0.026 Bq/cm²

 

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 background

α-channel

β-channel

about 0.2 cps

about 40 cps

Typical efficiencies

(ISO 7503-1)

14C

36Cl

90Sr/90Y

241Am

21 %

54 %

43 %

19 %

Typical MDA

(ISO 11929)

14C

36Cl

90Sr/90Y

241Am

0.954 Bq/cm²

0.191 q/cm²

0.254 Bq/cm²

0.055 Bq/cm²

 

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 identification66164
Transponder Chip/Cardfor transponder59495/59503
Card readerfor person identification66442
Magnetic cardfor card reader34481
Alarm columnSignalization of device status and contamination65252

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