ECOTEST DoseG and DoseGX Electronic Personal Dosimeter EPD-27

Features

• Scintillator-based detectors with a silicon photomultiplier

• Ability to store data in non-volatile memory

• Sound, light, and vibration alarms of threshold levels exceeding

• Infrared port for transferring the dose accumulation history and event history from the dosimeter to the personal computer, as well as for setting up the dosimeter

• Glass-filled plastic shock-resistant housing of high ingress protection rating IP67

• Backlight of the digital display

• Resistant to 60 repetitive shocks, each corresponding to a drop of 10 cm on a hard steel surface, and resistant to 6 drops (one drop on each side) from a height of 1 m on a hard surface

Specifications

Measurement and display range of photon ionizing radiation DER	1∙10-6 … 10 Sv/h
Main relative permissible error limit of EPD-27 DoseG dosimeter when measuring gamma radiation DER at 137Cs calibration with a confidence probability of 0.95   – in the range from 1∙10–5 Sv/h to 1∙10–3 Sv/h (inclusive) – in the range from 1∙10–3 Sv/h to 10 Sv/h	20 % 15 %
Main relative permissible error limit of EPD-27 DoseGX dosimeter when measuring gamma radiation DER at 137Cs calibration with a confidence probability of 0.95   – in the range from 1∙10–5 Sv/h to 1∙10–3 Sv/h (inclusive) – in the range from 1∙10–3 Sv/h to 1∙10–1 Sv/h – in the range from 1∙10–3 Sv/h to 10 Sv/h	20 % 15 % 15 %
Measurement and display range of X-ray radiation DER by EPD-27 DoseGX dosimeter	1∙10-6 … 1∙10–1 Sv/h
Measurement and display range of photon ionizing radiation DE	1∙10-7 … 10 Sv
Main relative permissible error limit of DE measurement at 137Cs calibration with 0.95 confidence probability, not more	15 %
Complementary relative permissible error limit of photon ionizing radiation DER and DE measurement result caused by ambient temperature deviation from 20 oС, in the temperature range from minus 20 to + 50 oС	5 % per each 10 оС of deviation from 20 оС
Operating supply voltage of the dosimeter from Li-polymer battery with a capacity of at least 400 mAh	3.7 V
Time of continuous operation of the dosimeter under normal climatic conditions when powered from a fully charged battery:   – under gamma background not more than 0.5 μSv/h and with switched off LCD backlight, switched off sound and vibration alarm, no less – under the conditions of DER measurement equal to 1 Sv/h and with switched-on LCD backlight, switched-on sound and vibration alarm, no less	170 h   4 h
Unstable readings of the dosimeter during 8 hours of continuous operation, not more	5 %
Energy range of detected photon ionizing radiation	0.05 … 10 MeV
Energy dependence when measuring photon ionizing radiation DER and DE relative to 0.662 MeV energy (137Cs), not more   – in the energy range from 0.05 to 1.25 MeV – in the energy range from 1.25 to 10 MeV	20 % 40 %
Energy range of detected X-ray radiation by EPD-27 DoseGX dosimeter	12 … 200 keV
Energy dependence of EPD-27 DoseGX when measuring X-ray radiation DER and DE relative to 0.662 MeV energy (137Cs), not more	from minus 30 % to 35 %
Operating temperature range	– 20 … + 50 °С
Dimensions of the dosimeter with a clip, not more	84.5 ´ 55 ´ 24.5 mm
Weight of the dosimeter, not more	0.11 kg