Harwell Dosimeters Ltd
540 Becquerel Avenue
Harwell Science and Innovation Campus
DIDCOT, Oxfordshire
OX11 0TA
United Kingdom
Tel: +44 (0)1235 435704
Fax:+44 (0)1235 436313
E-mail: Harwell Dosimeters

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Dosimeter Systems for Radiation Processing

Harwell Dosimeters Limited manufacture dosimeters for the radiation processing industry.

Dosimeters	Dose Range
	0.1 to 3kGy
	1 to 30kGy
	5 to 50kGy
View response curves

Three types, Red 4034, Amber 3042, and Gammachrome YR are made from radiation-sensitive poly-methylmethacrylate (pmma) in the form of optically transparent pieces individually sealed in laminate sachets.

They darken when irradiated, and the radiation-induced darkening, accurately measurable by means of a spectrophotometer, is a function of the radiation dose absorbed.

The fourth type are pellets made of the amino acid alanine in a wax matrix. They are available as plain pellets, or individually sealed in aluminium blisters.

On irradiation a stable radical is produced, which enables delivered radiation dose to be measured using a paramagnetic resonance spectrometer.

Dosimeters	Dose Range
Alanine Pellets	10Gy to 100kGy
Radspin^® Dosimeters	10Gy to 100kGy

HARWELL Dosimeters Ltd 540 Becquerel Avenue, Harwell Science and Innovation Campus, DIDCOT, Oxfordshire OX11 0TA, United Kingdom
Tel:	Orders and General Enquiries	+44 (0)1235 435704
Tel:	Special Requirements	+44 (0)1235 435707
Fax:	All fax	+44 (0)1235 436313
E-mail:	dosimeters@harwell-dosimeters.co.uk