More than just a radiation detector, the NukAlert(TM) is a patented personal radiation meter, monitor and alarm. Small enough to attach to a key chain, the device operates non-stop, 24/7 and will promptly warn you of the presence of unseen, but acutely dangerous levels of radiation. Used nationwide by federal, state and local first responders, law enforcement and the Dept. of Defense, the device is the ideal solution for increasing individual security and awareness of radiological threats. It will be very reassuring to know, with confidence, when you and your family are out of the worst danger. The NukAlert is a calibrated radiation meter that alarms when exposed to dangerous levels of nuclear radiation. It does not respond to relatively safe, low level radiation. Its primary utility is to aid in the location and evaluation of shelter during a radiation emergency. It may also be used to verify the reduction of radiation during evacuation. The NukAlert indicates radiation exposure by producing groups of audible alarm chirps about twice per minute. The number of chirps per group is easily counted. The approximate radiation intensity is indicated by the number of chirps produced per group. The lowest indicated level of radiation (0.1 Roentgen per hour) will cause a single chirp every 35 seconds. With each doubling of the radiation intensity an additional chirp is added to each alarm chirp group. At 0.2 R/hr the unit will double chirp every 30 seconds. At 0.4 R/hr it will chirp three times in a row, repeating every 25 seconds, etc. At the highest level (above 50 R/hr) the alarm will change to an uninterrupted series of siren-like sounds that become shorter and more frequent if the exposure rate continues to increase. Features & Specifications: Tested & Verified by Naval Air Warfare Center Always "ON" 24/7, Includes long-life 10+ year battery Detection Range: 100 mR/hr to 5,000 R/hr, Metering: 100 mR/hr to 50 R/hr, in 10 calibrated ranges Proportional Increasing Chirp Rate: 50 R/hr to 5,000 R/hr Gamma and X-rays from 20 keV to above 2 MeV Sensitivity incl. higher emergency radiation levels Alarm "chirp" corresponds to chart on back of device Introduced before Health Physics Society - 1/03 Performance verified by Nat'l Radiological Laboratory Each unit individually radiation accuracy tested Patented technology Made in the U.S.A.