Electronic personal dosimeters

Sv or Gy) or equivalent Wearing personal dosimeters Electronic dosimeter Direct display Alarm function Costly ... 

Measurements of the radiation dose exposure to radon and its decay products is carried out by an electronic radon gas personal dosimeter. Such a dosimeter is that named DOSEman (Sarad, Dresden, Germany) (Grundel and Porstendorfer, 2003). Using the dosimeter, the radon concentration is measured in the environment, e.g. in dwellings, mines, caves, etc., and can be converted to a personal dose. The entire measuring system is accommodated in a handy housing, so that it can be carried comfortably on the body. 

Fig. 5.17. Functional diagram of the electronic radon gas personal dosimeter DOSEman. MCA multi-channel analyser, EEPROM electrically erasable programmable read only memory, IrDA infrared inteface.

Fig. 5.18. Radon spectrum of the electronic radon gas personal dosimeter DOSEman with the chosen region of interest, ROI, and the tailing function of the peaks (counts/channel, cts/chn).

Grundel, M., Porstendorfer, J. (2003). Characteristics of an electronic radon gas personal dosimeter. Radiat. Prot. Dosim. 107, 287-292. 

People who work in radiology laboratories wear dosimeters attached to their clothing to determine any exposure to radiation such as X-rays, gamma ray, or beta particles. A dosimeter can be thermoluminescent (TLD), optically stimulated luminescence (OSL), or electronic personal (EPD). Dosimeters provide real time radiation levels measured by monitors in the work area. 

The personal portable (pocket) dosimeter usually contains a gas-filled or a semiconductor radiation detector (e.g., a G-M tube) tailored with an electronic device and a dedicated... 

In general the noise level in the community or inside a factory will vary with time. The equivalent noise level is defined as the notional steady noise level which, over a given period of time, would deliver the same amount of sound energy as the fluctuating level. Thus to maintain the Leg when SPL is doubled, exposure time must be halved (Table 20.2). The equivalent noise level concept forms the basis of the exposure criteria used in the Noise at Work Regulations 1989 which calls it daily personal noise exposure (Lep,ci). Where the fluctuation is not well defined the calculations can be done electronically using a dosimeter or statistical analyser. Transient noises also require statistical analysis and those measurements often required are ... 

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