FWT-60 series of radiochromic dosimeters are designed for radiation processing. They are thin, colorless films that gradually change to deep blue in relation to absorbed dose.

Colorless derivatives of the family of aminotriphenyl- methane 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-60 series of dosimeters use hexa(hydroxyethyl) aminotriphenylacetonitrile (HHEVC) dye. Analysis of the dosimeters is simple using a photometer or spectrophotometer. FWT manufactures Radiochromic readers designed specifically for analyzing its dosimeters. The wavelengths in general use are 510 nm and 600 or 605 nm. Together they cover the whole range of the dosimeter.
 
Specifications
 Type of Dosimeter: radiochromic thin film
 Dose Range: 0.5-200kGy (0.05-20Mrad)
 Dose Rate Dependence: Independent to over 10E12Gy/sec (10E14 rads/sec)
 Intrinsic Sensitivity: The response (change in absorbance divided by thickness) is independent over unit thickness. Calibration of one thickness is applicable to all thicknesses.
 Peak color wavelength: 605 nm
 Wavelength of interest: 510 nm and 600 or 605 nm
 Color Build Up Time: Typically within 1 hour
 Color Change: Unirradiated: clear; irradiated: deep blue
 UV Sensitivity: Will color when exposed to wavelengths less than 350 nm.

Ordering Information
 FWT-60-00: 1 cm x 1 cm x 42-52 microns, 1000 pieces/box
 FWT-60-20T: 10 x 10 cm sheets, priced per sheet
 FWT-60-20F: 15 x 15 cm, priced per sheet
 FWT-60-20S: Custom sizes to 45 x 15 cm, priced per sheet
 
Options
 FWT-80 Dosimeter Envelopes and FWT-81 Aluminum Laminated Pouches. These protect the dosimeters from stray light.
 Inquire about having FWT package, condition and seal the film in pouches for you.