DoseG and DoseGX

DoseG and DoseGX

ELECTRONIC PERSONAL DOSIMETER EPD-27

  • Available in two modifications: DoseG and DoseGX
  • Wide energy measuring range from 12 keV to 10 MeV (DoseGX model)
  • Two threshold levels for DE, DER, and time in the control zone
  • It may be used as a part of the automated IDC system
  • High ingress protection rating IP67
  • Compliance with the requirements of the International Standard IEC 61526
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  • Description
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Description

DoseG and DoseGX represent a new family of electronic personal dosimeters from the ECOTEST brand.

Dosimeters are intended for use as part of an automated system of individual dosimetric control and for autonomous use. Electronic personal dosimeters EPD-27 are available in two modifications – DoseG and DoseGX.

Dosimeters are used in nuclear power plants, in medicine, in industry, in radiological laboratories, and in institutions where they use sources of photon ionizing radiation.

Purpose of use

Purpose of use

  • Measurement of gamma and X-ray radiation individual dose equivalent (DE).

  • Measurement of gamma and X-ray radiation individual dose equivalent rate (DER).

  • Monitoring of time spent in the control zone.

  • Maintaining an automated database of dose load on personnel as part of the software and hardware complex (unified) automated system of individual dosimetric control of personnel.

Features

  • Wide energy measuring range from 12 keV to 10 MeV (DoseGX model).

  • Two threshold levels for DE, DER, and the time spent in the control zone.

  • It may be used as a part of the automated IDC system.

  • Compliance with the requirements of the International Standard IEC 61526.

  • 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 1.0 m on a hard surface.

Specifications of DoseG

Measurement and indication range of gamma radiation DE from 0.1 μSv to 10 Sv
Main relative permissible error limit when measuring gamma radiation DE at 137Cs calibration with a confidence probability of 0.95 within the range of 1 μSv to 10 Sv 15%
Measurement and indication range of gamma radiation DER 1 μSv/h to 10 Sv/h
Main relative permissible error limit when measuring gamma radiation DER at 137Cs calibration with a confidence probability of 0.95

  • – in the range from 10 μSv/h to 1 mSv/h (inclusive):
    – in the range from 1 mSv/h to 10 Sv/h:
  • not more than 20%
  • not more than 15%
Anisotropy when gamma radiation falls in directions at angles from minus 60о to 60о in the horizontal and vertical planes relative to the main (perpendicular to the front panel of the dosimeter) measurement direction, not more than:

  • – for 137Cs and 60Co radionuclides;
  • – for 241Am radionuclide
  • ±25%
  • ±60%
Complementary relative permissible error limit of photon-ionizing radiation DER and DE measurement result caused by ambient temperature deviation from 20oС, in the temperature range from minus 20 to + 50oС ±5% per each 10 оС of deviation from 20 оС
Unstable readings of the dosimeter during 8 hours of continuous operation, not more than 5%
Energy range of detected gamma radiation: from 50 keV to 10 MeV
Energy dependence when measuring gamma radiation DER and DE relative to 0.662 MeV (137Cs) energy, not more than:- in the energy range from 0.05 MeV to 1.25 MeV (inclusive):
– in the energy range from 1.25 MeV to 10 MeV:
± 20%± 40%
Dimensions of the dosimeter with a clip, not more than 84.5 × 55.0 × 24.5 mm
Weight of the dosimeter, not more than 0.11 kg
Operating temperatures range from -20 °С to +50 °С
Ingress protection rating IP67
Continuous operation time from the built-in Li-Po battery under normal gamma background, display backlight and alarm turned off, not less than 170 h
Operating supply voltage of the dosimeter from Li-Po battery with a capacity of at least 400 mAh 3.7 V
Mean life of the dosimeter (including repairs), not less than 10 years
Mean time to failure, not less than 6000 h
Average recovery time of the dosimeter 4 h
Average shelf life of the dosimeter if the battery is recharged 6 months after the start of storage, not less 10 years

Additional specifications of EPD-27 DoseGX

Measurement and indication range of gamma and X-ray radiation DE: from 0.1 μSv to 10 Sv
Main relative permissible error limit when measuring gamma and X-ray radiation DE at 137Cs calibration with a confidence probability of 0.95 within the range of 1 μSv to 10 Sv 15%
Measurement and indication range of gamma radiation DER: from 1 μSv/h to 10 Sv/h
Main relative permissible error limit when measuring photon-ionizing radiation DER at 137Cs calibration with a confidence probability of 0.95:

  • – in the range from 10 μSv/h to 1 mSv/h (inclusive):
    – in the range from 1 mSv/h to 100 mSv/h (inclusive):
    – in the range from 100 mSv/h to 10 Sv/h:
  • not more than 20%
  • not more than 15%
  • not more than 15%
Energy range of detected X-ray: from 12 to 200 keV
Energy dependence when measuring X-ray radiation DER and DE relative to 0.662 MeV (137Cs) energy, not more than:
  • from minus 30 to 35

Certificates

  • Type Examination Certificate № UA.TR.113-0679-21 dd. 31.12.2021

  • Certificate of Conformity № UA.TR.113-0679/01F-21 dd. 31.12.2021

Download certificates

Type Examination Certificate for EPD-27 is available at the link here

Certificate of Conformity for EPD-27 is available at the link here

Delivery kit

  • EPD-27 dosimeter
  • Operating manual
  • Packing box

Additional information

  • When purchasing a batch of dosimeters for use in an automated dose control system with a large number of users, it is possible to additionally supply devices CCD for charging and storing (can charge up to 40 dosimeters at a time) and device for programming/reading dosimeters – a unified access device with the appropriate software.

  • When purchasing a batch of dosimeters for use in an automated dose control system with a small number of users, it is possible to additionally supply USB/IrDA adapters with appropriate software for programming/reading and charging dosimeters.

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