Model FWT-70 -Opti-Chromic Dosimeters

FWT-70 series of Opti-Chromic Dosimeters are designed for low level radiation processing. They are small optical waveguides that gradually changes from clear to deep blue in relation to absorbed dose. The sensitivity ranges from 10 Gy to 20 kGy depending on the model. The dye is derived from the family of aminotriphenyl-methane. These dyes can be made radiochromic: that is they will change from colorless to a deeply colored state as a function of absorbed dose. The FWT-70 series of dosimeters use hexa(hydroxyethyl) aminotriphenylacetonitrile (HHEVC) dye inside an optical waveguide. Readout of the dosimeters is by photometric means using dual wavelength photometry.