Dosimeter Radex 1503 (Radex, Russia)

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RD1503 Indicator. Basic RADEX RD1503 Model, this instrument is meant for consumers having knowledge as regards dosimetry in everyday life but willing (or forced) to use dosimeters.

Technical Characteristics:

Range of dose ambient equivalent rate indications, mcSv/hour, from 0.05 to 9.99. 
Range of exposure dose rate indications, mcR/ hour, from 5 to 999.
Range of gamma-radiation energies, MeV, from 0.1 to 1.25.
Reproducibility of indications (at confidence probability equal to 0.95) where Р is dose rate in mcSv/hour, % 
15+6/Р
Levels of audio signaling, mcSv/hour, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90

                                                 mcR/ hour, 10, 20, 30, 40, 50, 60, 70, 80, 90
Observation time in seconds, 40 ± 0.5*
Indication is continuous.
Battery of AAA type, one or two pieces.
Continuous operation term is at least 550 hours**.
Dimensions (height x width x thickness) do not exceed 105 х 60 х 26 mm.
Instrument weight (without batteries0 does not exceed 0.09 kg. 
Range of registered Roentgen radiation energies, MeV, from 0.03 to 3.0***.
Range of registered beta-radiation energies, MeV, from 0.25 to 3.5***.

* Increase of tests number results in indications reliability growth. 

** Two batteries with capacity of 1350 mAhour at natural background level not exceeding 0.3 mcSv/hour, provided manufacturer’s settings of the instrument are preserved. 

*** Characteristics were obtained as a result of research performed by Centre of Ionizing Radiations Metrology assigned to the State Scientific and Metrologic Centre (VNIIFTRI) in the period from the 1^st to the 8^th December 2005 and approved by reports dated 14.12.2005.

 Verification of the metrological characteristics of indicators of radioactivity party is done by certified radioactive sources: