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Passive Dosimeter

A passive dosimeter is a device used to record Personal Exposure to Radiation (and sometimes Environmental Exposure). Examples are the Film Badge and the Thermo Luminescent Dosimeter (TLD). A newer technique uses a solid state system to create a USB dosimeter. This is still passive but can be read by plugging into a computer. An alternative is to use an Active Dosimeter which provides a real-time instant measure of Dose accrued and Dose Rate. Active dosimetry is the preferred option and is becoming cheaper year by year.

If you start from nothing, it is very difficult to get anywhere

– Gerhard Herzberg