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InLight® Model 2


  • Hospitals & Health Care Systems
  • Industry & Energy

InLight dosimeters provide x, gamma, and beta radiation monitoring with optically stimulated luminescence (OSL) technology, a form of passive radiation detection dosimetry. InLight dosimeters are engineered to be read out by an InLight Reader.

InLight dosimeters are designed for clients with extensive data management capabilities who prefer to independently maintain data and issue dose reports. They are available in combination with InLight OSL Readers for a total turnkey solution enabling an in-house accredited dosimetry program. In addition, InLight dosimeters can also be used by clients who utilize LANDAUER dosimetry services, which provides accredited processing and analysis.

InLight is appropriate for personnel, area/environmental, and emergency responder radiation dose monitoring.


Advanced Design

InLight dosimeters are built on an assembly of a case component with metal and plastic filters along with a four-positioned aluminum oxide detector slide component. Both the case and slide are uniquely bar coded with serial numbers for chain of custody and sensitivity identification. InLight dosimeters offer reanalysis capabilities, precision with a wide dynamic range of measurement, and long-term stability. The InLight Basic dosimeter consists of the case and slide for use with a clear plastic holder.

The enhanced LANDAUER holder is designed to accommodate the optional CR-39 for neutron detection, the optional imaging component, client defined labels and the case assembly and slide. The case component has an open window with aluminum, copper and plastic filters. The imaging component renders unique filter patterns to provide qualitative information about conditions during exposure. Dosimeter labels can be vertical or horizontal and offer numerous graphic and text fields definable by the client to meet the administrative needs of a radiation monitoring program.

The environmental dosimeter is designed to meet ANSI N545 Standard and ANSI/HPS Standard N13.37. The case has copper and plastic filters and is sealed along with the slide component in a waterproof plastic pouch. Labels can be vertical or horizontal and offer numerous graphic and text fields definable by the client.

InLight Holder

inLight Environmental Product

Technical Specs

Technical Specifications


  • Linear from 10 µSv (1 mrem) to in excess of 10 Sv (1,000 rem)
  • Energy range from 5 keV to 20 MeV
  • Gamma, x-ray, beta minimal reporting: 50 µSv (5 mrem)
  • Neutron detection with an optional CR-39 sensor processed with Track Etch® technology minimal reporting:
    • Fast: 200 µSv (20 mrem)
    • Thermal/Intermediate: 100 µSv (10 mrem)
Operational Advantages


Complete reanalysis capabilities

  • Nondestructive readout allows for dose verification
  • Dosimeter archiving made possible
  • Track exposure over time—take incremental dose assessments

Dosimeter preparation eliminated

  • No annealing
  • No maintenance of the detectors sensitivity required
  • Engraved 2D bar code identifies dosimeter sensitivity

Insignificant fade

  • Longer wear frequencies

InLight Systems and OSL Technology

The InLight System measures radiation exposure with aluminum oxide detectors (Al2 O3 :C) readout by optically stimulated luminescence (OSL) technology. The readout process uses a light emitting diode (LED) array to stimulate the detectors, and the light emitted by the OSL material is detected and measured by a photomultiplier tube (PMT) using a high sensitivity photon counting system. The amount of light released during optical stimulation is directly proportional to the radiation dose and the intensity of stimulation light. A dose calculation algorithm is then applied to the measurement to determine exposure results.



Inlight Components Image