As of January 27, 2013, Parcel Select was split into Parcel Select, for online purchasing, and Standard Post for purchasing at the Post Office. Parcel Select is significantly cheaper than Standard Post. Parcel Select ships at the same speed as First Class mail.
Wiktionary (0.00 / 0 votes) Rate this definition: dosimeter (Noun). A device used to measure a dose of ionising radiation. These normally take the form of either Optically Stimulated Luminescence (OSL), photographic film, thermoluminescent devices (TLD) or electronic personal dosimeters (PDM).
Thermoluminescent dosimeters can measure doses as low as 1 millirem, but under routine conditions their low-dose capability is approximately the same as for film badges. TLDs have a precision of approximately 15% for low doses. This precision improves to approximately 3% for high doses.