Amber Perspex 3042 Dosimeters

What is an Amber Perspex 3042 Dosimeter?

Amber Perspex 3042 dosimeters were first developed in the 1970s, and are made of polymethylmethacrylate (PMMA). The dosimeter incorporates a proprietary dye that causes the Perspex to darken when irradiated. The radiation induced darkening of the Perspex dosimeter is accurately measurable via a spectrophotometer and is a function of the radiation dose absorbed.

Sold in boxes of 1,000, Perspex dosimeters have been developed for the measurement of high doses of radiation in industrial radiation processing environments.  Perspex dosimeters are irradiated in their sachets, which are opened when being read in a spectrophotometer. This means that the dosimeters can be used to measure the dose of irradiation used in radiation processing environments.

What is the Dose Range​ of an Amber Perspex 3042 Dosimeter?

The functional dose range of Amber Perspex dosimeters is 1 kGy to 30 kGy, making them ideal for many irradiation processes. Identification and measurement of the dosimeter is completed using an electron paramagnetic resonance (EPR) spectrometer, at the recommended read-out wavelengths of either 603 nm or 651 nm. ​

Amber Perspex 3042 Batch Naming​

The dosimeters are produced in batches, and the batch reference numbers or letters are displayed on the dosimeter labels (for example, 4034 AX is Amber Perspex 4034 batch AX). Each batch of dosimeters is subjected to rigorous quality control, checked for conformance with specification, and calibrated using a standardized Cobalt-60 irradiator and spectrophotometer before release for sale.​

What is the Amber Perspex 3042 Measurement Reproducibility​?

Irradiation response: CV up to 2.5%

This is based on the coefficient of variation of specific absorbance measurements on sets of dosimeters from the batch, simultaneously irradiated together, in a radiation field uniform within ±1%, over the calibrated range 1 to 10 kGy at 603nm wavelength and 10 to 30 kGy at 651nm.​


  • Each batch of Amber Perspex is verified via a third-party calibration prior to release ​
  • The shelf life of unirradiated dosimeters is 10 years from date of release, if stored at a temperature of 20±5°C and provided the sachet seal is intact
  • After irradiation, Perspex dosimeters should be measured within two days
  • Less than one pouch in approximately 200,000 may be packed with two dosimeters. This does not affect dosimeter performance.  One dosimeter may be disposed of while the other is read, or a mean of the two can be taken, if preferred​.

What is the Amber Perspex 3042 Dimensions?

Each Perspex dosimeter measure 30 mm x 11 mm in size and are optically clear rectangular pieces of material.

Thickness 3.00 ±0.55 mm

Each perspex dosimeter is individually sealed in laminate sachets.

Contact our team with your dosimeter inquiries.