The Berthold LB 1236-H10 probe with an energy compensated proportional counter tube (50 nSv/h – 10 mSv/h) is available for gamma dose rate measurements. The measured radiation quantity is ambient dose equivalent H*(10) and ambient dose rate equivalent Ḣ*(10).
It consists of a preamplifier/HV generator in a cylindrical case, which also serves as a handle, and the firmly installed counter tube. For dose rate measurements, the probe is designed to  evaluate the effect of radiation, for instance, the ambient equivalent dose rate and not the number of counts. Accordingly, the probe is equipped with a sophisticated energy filter system (consisting of different materials). The exactly calculated construction of the energy compensation filter system ensures that the count rates triggered in the proportional counter tube are largely independent of the energy of the gamma radiation. The unit of the ambient dose equivalent rate is μSv/h. The unit of the ambient dose equivalent (integrated dose rate) is μSv (in USA usually mrem).

The highest sensitivity of the counter tube is perpendicular to the longitudinal axis. The centre of the active area is marked by a blue ring on the probe case. Due to this quench, the counter tube should always be held vertical or transverse to the radiation incident direction.

The measuring results for the Berthold LB 1236-H10 probe are shown on the easy to operate battery Universal Monitor (UMo II) LB 134 which contains a display, data storage and USB interface.

For more details, please refer to datasheet.

Features:

• Ambient equivalent energy compensated proportional counter
  

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• High voltage for the proportional counter tube (high voltage setting internally or external control signal)
  

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• Amplifier discriminator circuit
  

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• For low dose rate levels (50 nSv/h to 10 mSv/h)