LB 6701

Berthold
LB 6701

Ionisation Chamber

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The LB 6701-H10 is an ionisation chamber used for dose rate measurements in various radiation protection applications: dose rate probe for photon radiation in health physics applications.

The measured quantity is ambient dose equivalent H*(10) and ambient dose rate equivalent Ḣ*(10). The ionisation chamber is made from aluminium with a nitrogen gas filling at 10 bar and a radiation resistance up to 106 Gy.

The ionisation chamber exists in 3 versions:

  • LB 6701L – Low dose rate 10 µSv/h to 10 Sv/h
  • LB 6701M – Middle dose rate 0.1 mSv/h to 100 Sv/h
  • LB 6701H – High dose rate 1 mSv/h to 1000 Sv/h
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Description

The Berthold LB 6701 ionisation chamber is a photon radiation dose rate probe used in health physics applications. Its measured quantity is ambient dose equivalent H*(10) or ambient dose rate equivalent Ḣ*(10).

The Berthold LB 6701 ionisation chamber is made from aluminium with a nitrogen gas filling at 10 bar and a radiation resistance up to 106Gy. The chamber current is proportional to the dose rate, this current is converted into a +11V Norm pulse frequency in the Current/Frequency converter LB3856-23 or LB3856-24.

The Current/ Frequency converter is mounted in a separate housing LB6703 which also contains the high voltage module to operate the ionisation chamber. A 90Sr check source with 2.5 kBq, 25 kBq or 50 kBq activity is built in the ionisation chamber to continuously monitor the proper functioning of the system.

The ionisation chamber exists in 3 versions:

  • LB 6701L – Low dose rate 10 µSv/h to 10 Sv/h
  • LB 6701M – Middle dose rate 0.1 mSv/h to 100 Sv/h
  • LB 6701H – High dose rate 1 mSv/h to 1000 Sv/h

Main applications:

  • Nuclear Medicine
  • Civil Defence and Disaster Control
  • Research Facilities
  • Industry and Services
  • Public Facilities
  • Nuclear Facilities

For more details, please refer to the datasheet.

Specifications

LB 6701L
Measuring range10 µSv/h – 10 Sv/h
Energy range45 keV – 1,3 MeV with regard to Cs-137 and 0°
Calibration factor 0,1 mSv/h per cps
High Voltage 1000 Volt
LB 6701M
Measuring range0,1 mSv/h – 100 Sv/h
Energy range45 keV – 1,3 MeV with regard to Cs-137 and 0°
Calibration factor 1 mSv/h per cps
High Voltage 1000 Volt
LB 6701H
Measuring range1 mSv/h – 1000 Sv/h
Energy range45 keV – 1,3 MeV with regard to Cs-137 and 0°
Calibration factor 10 mSv/h per cps
High Voltage 1000 Volt
Output pulse I-F-Converter (all units)
Polaritypositive
Amplitude+ 4,5 V in 50 Ω
Pulse width2 - 5 µs
Frequency range0,1 Hz – 100 kHz
Operating Conditions (all units)
Temperature0 to + 50°C
Rel. humidity20 to 80 %
Storage temp.max. 60°C
Protection Degree IP 65
Dimensions (all units)
Ionisation chamber80 mm Ø x 268 mm
I-F-Converter connection box240 x 160 x 90 mm

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