You can also download all information as a flyer in our download section.

Short description
Structure of an OSL dosimeter
Source: AWST

Our OSL dosimeter contains two ceramic beryllium oxide (BeO) detectors. These are located on a plastic card (ABS) inside an ultrasonically welded, light-proof dosimeter cassette . Due to BeO's positive dosimetric property of detecting radiation of different energies in all tissues with only small deviations (linearity over a wide energy range and tissue equivalence), detectors made of beryllium oxide are particularly suitable in whole-body dosimetry.

To avoid dose manipulation and contamination by dust and water, all OSL dosimeters are delivered to you in a transparent blister packaging. We would like to point out that no official dose value can be determined if the blister packaging is damaged.

The OSL dosimeter can be attached directly to clothing with a clip or a support frame that includes a clip. You can order support frames in the colors blue, green, yellow, red and pink. As an official personal dosimeter, our OSL dosimeter has a type test certificate from the Physikalisch-Technische Bundesanstalt (PTB).

Functionality and dose determination

The principle of Optically Stimulated Luminescence (OSL) is similar to the principle of Thermally Stimulated Luminescence (TL). Energy in the form of ionizing radiation hits the detector made of BeO and is stored by lifting electrons to higher energy levels. During this process, electrons are trapped in so-called electrical traps until excitation by light occurs again and the electrons fall back to the lower energy base level. This causes the detector to release the stored energy in the form of light. The light output measured with photomultipliers is then a measure of the dose.

Unlike Thermally Stimulated Luminescence, Optically Stimulated Luminescence is not excited with heat but with light.

How to wear
Wearing the OSL dosimeter: in the torso area, at chest level
Source: AWST

The dosimeter should be attached at a point appropriate to the radiation field, usually on the trunk (chest, hip). When using a lead apron, the dosimeter must be worn under the apron.

In addition, there are alternative carrying options. For example, you can use a support frame with an in-house label (for more information, see the OSL handling flyer) and a polyethylene pressure seal bag (with or without a label).

Please note that all alternative ways of carrying or marking with additional labels require consultation with us.

Instructions for use
OSL in support frame with label
Source: AWST

The OSL is issued by the monitoring service in a blister package for the duration of a wearing period (usually one month, maximum three months). The front of the packaging has a label on which, the dosimeter ID, the customer ID, the wearing period and the person assignment can be found. This label is for your dosimeter management only, you can overwrite and stick it. However, another label must not exceed the front of the package and must be made of paper or hydrocarbon plastics (e.g. polyethylene or polypropylene). The total thickness of the sticker and any carrier bag must not exceed 0.2 mm.

The dosimeter must be aligned with the anticipated radiation in such a way that it optimally strikes the probe plane perpendicularly from the front, but always maintains an angle of incidence of + 60 to - 60 degrees.

The dosimeter is suitable for use at an ambient temperature of -10°C to +40°C and a relative humidity of 10% to 90%. It should not be exposed to direct sunlight above 1000 W/m². If necessary, the blister packaging can be cleaned with a damp cloth.

Energy and measuring range

Type of radiation measuring range Photon energy
Photon radiation 0.1 mSv to 10 Sv 16 kev to 7 MeV
Using the OSL dosimeter with DosiNet

The OSL dosimeters are offered to you with the DosiNet or DosiCon customer software. Changes to person assignments can thus be made quickly and easily online.

Further information on DosiNet and DosiCon can also be found on our AWST homepage in the Dosimetry Online section. Don't hasitate to contact us by e-mail or callinig the hotline 089 2555 2554, if you have any further questions.

Type test certificate

Please note the simplified and cost-effective option for radiation protection monitoring with OSL dosimeters for members of the fire department.