radiation detector

[Timelord]

Army Surplus sometimes have them. Try Anchor Supplies in Derbyshire. They may know where to get one. Otherwise just search the net. There are civvy ones available. Try Japan

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You can get personal dosimeters very cheap. There are quite a few on ebay. You will also need the dosimeter reader to read them which is a bigger piece of kit. Also it needs calibrating, as do all geiger type readers. I would forgo the calibration in an emergency. All you need to know is what the background rad rate was in your locale before a radiation event and then anything reading above that post event, is extra & unwelcome. You need to study what dose rates are viable post event, so you know what rad amount you can tolerate if necessary at the time. Small amounts build up & are cumulatve over time but so is the drop off rate. Also, internal dose is vastly different to external irradiation!!
I read somewhere recently that NBC Masks & kit that troops get supplied are usually carried with testing & physical decontamination substances. Amongst these items was listed Radiation indicator papers. Something like litmus papers but for radiation. Maybe these are worn on the outside of soldiers clothing, so it is apparant when one of the papers changes colour. That could be v.useful while on the move. Hope some of this is useful. TL.