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RADView PD Dosimeter Badge
The RADView™ PD dosimeter badge is a credit card size radiation dosimeter incorporating a self-developing radiochromic film to provide visual measurement of absorbed radiation dose. The film develops a distinctive and characteristic color upon exposure to ionizing radiation, becoming progressively darker in proportion to absorbed dose. RADView™ PD dosimeters are unaffected by brief exposures to sunlight or normal room light. The films are water resistant, tissue equivalent, energy independent and dose-rate independent. The badges do not require calibration or maintenance, have no electronics or batteries, and are small and light. The RADView™ PD can be read visually by the wearer at the incident scene. Accuracy is within 5% and combined accuracy and precision is within 10% in voluntary testing performed with a NAVLAP calibration facility %. The visual readout does not require darkroom or processing equipment.
Under most conditions, the dosimeter can be worn for one year before replacement. A quick visual observation of a RADView™ PD dosimeter allows anyone to assess the absorbed dose. Once an exposure is visually evident, a fully quantitative measurement to confirm the radiation dose can be performed, if required, by optically scanning the RADView™ PD dosimeter.
RADView SpecificationsType: Visual Reading Dosimeter, radiochromic film
Dimensions: Credit Card Sized
Service Life: Potentially years at 20°C
- Energy Independent
- No Batteries
- Pre Calibrated
- Waterproof
- Disposable
In the RADView™ PD dosimeter, circular segments with calibrated background colors surround the radiation sensitive film. The color of each reference segment is calibrated to the dose printed on that segment. The background colors of each segment are permanently printed on the badge and do not change, providing a constant reference value for each dose level. If the sensitive film in the center of the reference segment is darker than the background, the dose is greater than the number on that segment (“dose is darker”), as shown in the examples below.
NOTE: Action guidance and annular segments are based on USEPA Emergency Response Worker Guidelines (see below)
USEPA Emergency Response Worker Guidelines (rem) Source: Federal Register Vol. 71 No. 1 , January 3, 2006
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All Occupational Exposure
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5 |
Protecting Critical Public Property
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10 |
| Lifesaving and Public Protection |
25 |
Dosimeters can be prepared with the wearer’s name and affiliation printed on the badge. Quantity discounts are available for military and first responder organizations under a subscription plan that sends new dosimeters before the expiration date. RADeCO, a veteran-owned small business, is the exclusive worldwide distributor for RADView™ PD dosimeters. Laboratory readouts and dose evaluations can be provided by Dade Moeller & Associates, Inc. under an exclusive agreement with RADeCO.
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Why RADView?
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Compare to competition
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The RADView badge uses an amber film with an SPF (to be provided by ISP) that protects the dosimeter from sunlight and fluorescent light. During an incident the badge can be clipped to the outside of clothing or placed in a sleeve to facilitate direct reading. The badge can be read while wearing gloves.
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The card comes with a black plastic film that completely covers the card. YOU CANNOT READ THE DOSE WITHOUT LIFTING THE FLAP. THIS REQUIRES TWO HANDS. Reading the badge could be difficult while wearing heavy gloves or multiple layers of gloves, as is typical in firefighting, HAZMAT or radiological protection environments.
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The RADView badge incorporates a USE period indicator using grey scale contrast to determine if the badge is too old or has excessive UV exposure and needs to be replaced.
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Other colorametric dosimeter cards incorporate a FIT indicator that gives an immediate color indicator of exposure to excessive heat or UV. THIS INDICATOR MAY BE DIFFICULT OR IMPOSSIBLE TO INTERPRET BY COLOR BLIND PEOPLE.
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The amber filter converts the natural blue color of the film to grey scale, which allows workers with color blindness to read the dose accurately.
Testing has shown that 93% to 98% of test participants can interpret the grey scale display of RADView and correlate to an appropriate Protective Action Guidance.
Ten million men in the US are color blind. This is 7% of the population. Color codes are difficult or impossible for color blind people to interpret. Examples are battery jumper cables, electrical wiring, DHS security level classification, fire extinguisher codes, or bottled gases. Good graphic design does no use color “avoids using color coding or color contrasts alone to express information” (Wikipedia)
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The badge has a “color matching scale” designed to let you “see the dose in colors,” which is difficult or impossible for color blind people.
Testing by a government laboratory showed that color blind individuals, who comprised 25% of a volunteer group, showed an average total error of ~90% in reading doses on “the other dosimeter badge” cards.
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The RADView badge meets or exceeds all existing or proposed government standards for temperature stability.
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Finally, the material used in our card has a higher temperature threshold.
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The RADView badge accurately responds to radiation energies from 60 keV X-rays to 1 MeV within an accuracy of 5%.
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In a government laboratory test, the “the other dosimeter badge” 137Cs response differs from the M150 x-ray response by 45 percent.
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For ANSI N322, the performance requirement for the accuracy test is that the measured result be within 10 percent of the delivered dose. Testing by an independent laboratory shows RADView has an accuracy error less than 3% for gamma rays.
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For ANSI N322, the performance requirement for the accuracy test is that the measured result be within 10 percent of the delivered dose. The government laboratory results for Cs-137 show an inaccuracy of approximately 40% and that most “the other dosimeter badge” results DO NOT MEET THIS STANDARD.
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For ANSI N13.11, the performance requirement is that the total bias plus standard deviation error be within 30% of the delivered dose. Testing by an independent laboratory shows RADView has a total error less than 9%.
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For ANSI N13.11, the performance requirement is that the total bias plus standard deviation error be within 30% of the delivered dose. The government laboratory results show that “the other dosimeter badge” total error is 56% for Cs-137, WHICH DOES NOT MEET THIS STANDARD.
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Downloads
Human Factors Testing Slide Show
Brochure
RADView Quotes in Powerpoint format
RADView Quotes in PDF format
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