RadTriage Portable Personal Radiation Detector
The RADTriage 50 Radiation Detector is a U.S. Military-grade personal dosimeter that instantly detects radiation exposure in the event of a dirty bomb, nuclear reactor accident such as Fukushima and Chernobyl and other sources of radiation that may result from an irresponsible government incident . This always-on wallet card/badge radiation detector does not require batteries or calibration. The sensor strip instantly turns darker when it detects harmful levels of radiation.
RADTriage50 will continue to instantly detect radiation after an Electromagnetic Pulse (EMP) bomb detonation because it has no electronics.
Instant detection of radiation from sources such as nuclear reactors (Fukushima), nuclear bombs, dirty bombs and other nuclear incidents.
The RADTriage50 (USP# 7,227,158 and others) is always active and ready to use. It is a smart dosimeter and has the capability of monitoring shelf life, false positives/negatives and tampering. When exposed to radiation, e.g., from a “dirty bomb”, the sensor of the RADTriage changes color instantly. The color changes are permanent, cumulative and proportional to dose, thereby providing the wearer and medical personnel instantaneous, easy to read information on radiation exposure of the wearer to assess the health risks and guide medical treatment. The RADTriage does not reset itself after exposure to radiation and should at that time be replaced.
Types of Radiation
The RADTriage sensor responds to gamma/X-ray (energy higher than 30 KeV) and high energy (e.g., above 1 MeV) electrons/beta particles. Color development of the Sensor is essentially independent of dose rate. However, protective films attenuate low energy (below 200 KeV) X-ray. RADTriage will not be affected by normal exposures to diagnostic X-rays (e.g., chest or dental) or security/airport X-ray/CAT scan machines, except that multiple exposures (more than five) to such will result in sufficient enough exposure to produce a detectable color change in the sensor.
How to Read Dose with RADTriage50
Estimate the exposure dose by comparing the color of the sensor with the Sensor Reference Bars. Find a bar which closely matches the color of the sensor and read the dose in mSv printed adjacent to those bars. If the Sensor develops a color in-between any two adjacent bars, this indicates an in-between dose. For a nearly tissue equivalent dosimeter, such as RADTriage, 1 rad = 1 rem = 10 mSv. It can be viewed in any light. However, we recommend reading the dose under fluorescent lights for better accuracy. Color matching under other lights may not be as accurate. Dose can be estimated with an uncertainty of about 20% with a color-matching reference chart. Where additional accuracy is needed, a spectrophotometer or an optical densitometer can be used to determine the dose to within 10%. The RADTriage does not reset itself after exposure to radiation and should at that time be replaced.
Effects of Heat and UV Light:
The sensor of the RADTriage will develop colors faster if exposed to UV/sunlight for a prolonged period. Keep the RADTriage at or below normal room temperature. Repeated, e.g., hundreds, of readings where the sensor gets exposed for less than a minute per reading (even under direct sunlight) will cause little or no color development in the sensor.
Inactivation & False Negative Indicator:
If the dots of the FIT Indicator is dark blue, the sensor is active, it is monitoring radiation and the calibration is valid. However, if it has changed to red, your RADTriage has been heated near or above 175oF/80oC which has made the sensor inactive to radiation or of altered sensitivity to radiation. DO NOT USE the dosimeter if the dots of the FIT Indicator are red. Turn the dosimeter in to the issuing organization with a description of the circumstances. The heat treatment can be used by medical authorities to fix the sensor for permanently documenting the radiation exposure as a part of a medical record.
The shelf life (expiration date) of the dosimeter is based on storage of the RADTriage at room temperature (77oF/25oC) or below and continuous protection from ultraviolet/sunlight exposures. Shelf life will be reduced if it is stored at higher temperatures and/or exposed to UV/sunlight for a prolonged period (e.g., more than a few hours of direct sunlight). The area surrounding the dots should be lighter in color when issued/purchased. If it has developed a color matching or darker than the Color Reference Bar on its right, the shelf-life of the RADTriage has expired; it was overexposed to UV light, and/or exposed to higher temperatures for a prolonged period. The sensitivity of the FIT Indicator to X-rays is hundreds of times lower than that of the sensor.
The sensor of the RADTriage will develop color equivalent to about 10 mSv in about two years if stored at 77oF/25oC. The shelf-life/guaranty of the RADTriage expires two years from the issue date and definitely when the color of the area surrounding the dots of the FIT Indicator matches or is darker than the Color Reference Bar on the right hand side.
The shelf-life of the RADTriage50 can be extended up to 10 years by storing in the freezer. Once removed it will have a usable life of at least two years.