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 Optimized for use the GAFCHROMIC Dosimetry Media.
Designed to measure the optical density of self-developing GAFCHROMIC Dosimetry Media
Optimized to measure the principle (671 nm) absorption spectrum peak of GAFCHROMIC Dosimetry Media
High-precision, instant readout, easy to use
Compact, hand-held, rugged
Unsurpassed performance and value; priced at a fraction of the cost of laser densitometers
Features a high-quality 2-D film transport mechanism with ±0.1mm precision
Provides three-times the sensitivity of He-Ne laser densitometers
The Radiochromic Densitometer is a highly accurate, reliable, and rugged test tool that allows precise and repeatable measurements to be made quickly and easily. Its state-of-the-art design incorporates a narrow bandpass filter. This filter matches the principle peak of the dose absorption spectrum for GAFCHROMIC Dosimetry Media, thus maximizing sensitivity and calibration stability. By using the Radiochromic Densitometer with Film Transport System, readings of optical density for GAFCHROMIC Dosimetry Media can be obtained directly, accurately, and are reproducible.
The two-dimensional film transport system is supplied with the Radiochromic Densitometer. Its micrometer-like design provides a precise method of holding and moving a piece of GAFCHROMIC Dosimetry Media over the aperture of the densitometer in both x and y dimensions. The micrometer movement and the devices vernier scale provide an x-y axis precision of ± 0.1 mm.
The Radiochromic Densitometer includes:
Carrying / storage case
Five-step calibrated density tables (gray scale)
A durable, aluminum-bottom casing houses 4 AA batteries (good for approximately 3,000 exposures), and the detector light source
Specifications for Radiochromic Densitometer
Density Range: 0 - 4.00
Accuracy: ±0.02 D over specified range
Reproducibility: ±0.01D
Aperture: 2 mm
Measuring Length (Throat): 5.3 in (135 mm)
Zero Range: Auto-zeros to density 0.0 (for densities up to 1.00)
Sensor: High-efficiency silicon photodiode
Light Source: Ultra-bright red LED. A bandpass filter mounted above the LED provides a 10 nm bandwidth centered at 671 nm.
Lamp turns on during measurement; provides extremely long life with minimum spectral and intensity degradation; reduces specimen heating to a minimum.
Controls:
ZERO Button: Automatically zeros unit
POWER: On/Off switch
READ-button: Initiate read sequence
Calibration Control: Screwdriver-adjustable; 20-turn potentiometer used to calibrate against a known step tablet
LAMP-button: Turns light source on for three seconds
Operating Temperature Range: 50° F to 104° F (10° C to 40° C)
Display: 3-Digit, .5 LCD with polarity and low-battery indicator
Power: Four 1.5 V AA batteries
Dimensions: 3.2 W x 7.1 D x 2.4 H
Weight: 1 lb. 13 oz.
Specification for Film Transport System:
Range of Film Movement: 6 cm x 3 cm
Precision: ±0.1 mm
Dimensions: 5 7/8 W x 10 7/8 L x 1/2 thick
Base thickness plus measuring device height equals 2 1/8
Weight: 2.2 lbs (1.01 kg)
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