Active Personal Dosimeters (APD)

Different detectors are used in gamma, neutron and gamma-neutron active dosimeters. However, the silicon diode detector is most suitable semiconductor material in gamma-neutron dosimetry. Semiconductor detectors have many advantages over other types of detectors due to less volume, weight and bias voltage are needed to make the active personal dosimeters.
Active personal dosimeters (APD) are widely used in many fields, i.e. in the medical field and as operational dosimeters in nuclear power plants. Their use as legal dosimeters are already established in a few countries, and will increase in the near future.



  • Radiation measurement: Gamma
  • Detector type: Silicon diodes
  • Measurement  range of gamma response: 60 KeV-6 MeV
  • Measurement  range of gamma dose rate: From background to 1 Sv/h
  • Measurement  range of instantaneous gamma cumulative dose: Up 10 Sv
  • Gamma measurement accuracy: < ± 30 %
  • Energy dependence of gamma radiation:

In the energy range 60 keV to ± 20%: 2 MeV

In the energy range 2 MeV to ± 50%: 6 MeV

  • Angular dependence: ±30 to ± 60°
  • Response time: < 10 s
  • Operating temperature: -20 to +60 °C
  • Storage temperature: -30 to + 70 °C
  • Maximum dimensions: length: 85 mm, width: 65 mm and height: 20 mm
  • Maximum weight: 200 g
  • Compliance with standards: IEC 1283, ANSI 42.20 and IDS 265


Long Term Warranty And After Sales Service

The warranty service includes the repair or service of the instrument and the free provision of services for replacing parts and repair wages for one year, but the warranty does not apply on the following cases:

  • Transport damages, electrical fluctuations, fire or heat, contact or penetration of water and corrosive chemicals, intense dust, lightning, natural disasters.
  • Instruments manipulated or repaired by persons other than the company’s representatives.
  • Any kind of manipulation or damage on installed holograms on the instrument.
  • Any displacement after installation without informing the company.
  • The warranty does not cover consumables.
  • After sales service is for 10 years with payment.

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