ONYX®: OSL ring dosimeter

The ONYX is a passive ring dosimeter compatible with OSLR reader.
It measures X-rays, gamma rays and beta radiation.

Specially designed for dosimetry labs, its functional design minimizes your set-up time.

Easy assembly
Clip-on parts
Reusable
holder and MP7 OSL Sensor tracability with 2D barcode

Discover ONYX service cycle

Staff dosimetry

Workstation studies

Download the datasheet

ONYX®: OSL ring dosimeter

Characteristics Technical specifications Dimensions Measurement method Performance assessment Accessories Related products

3 colours available for wear period identification

Characteristics

This comfortable ring lets you focus on your work, not on your dosimeter.

The ONYX dosimeter ring is flexible, comfortably fitting your finger. It is available in two sizes to ensure comfort for everyone and 3 colours for easier wear period identification.

The ring is light, easy to wear, and thin enough not to hinder your movements.

The ONYX ring has rounded edges ensuring comfort and eliminating the risk of tearing gloves or slipping off when gloves are removed. ONYX stands up to everyday wear and tear, even when washing hands. It cannot lose its shape.

Technical specifications

Energy range	Photons	± 60° incidence angle from 15 keV to 1.33 MeV
	Beta	± 60° incidence angle (Emean = 0.8 MeV; ⁹⁰Sr/⁹⁰Y)
Dose range		100 μSv – 10 Sv
Types of radiation measured		Photons (X- and gamma rays) and beta
Detector		Single MP7 OSL sensor
Sensor material		Aluminium oxide doped with carbone, Al₂O₃:C
Holder material		Polyethylene

Dimensions

Two sizes to match worker finger shape

Weight:

M – 1.05g
L – 1.30g

Finger size (Circumference in mm) :

M – 44 (Minimum) – 47 (Medium) – 63 (Maximum)
L – 53 (Minimum) – 57 (Medium) – 69 (Maximum)

Measurement method

MP7 OSL sensor

This ring uses a novel tissue equivalent MP7 OSL sensor. The OSL material is made from Aluminium oxide doped with Carbon (Al₂O₃:C).
The dose is measured using the OSLR readers.
The read out process uses a LED (Light Emitting Diode) to stimulate the detectors. The light emitted by the OSL material is 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.

Learn more about OSL technology