RadDetect Radiation Detector Dual-Mode Radiation Alert types

RadDetect PRD 1250 Radiation Detector
Dual-Mode Radiation Alerts

Auto Alert (with directional feature)

Instant Alert: Exposure to gamma, high energy beta or x-ray radiation of 75 milliRoentgens per hour (mR/hr) is sufficient to trigger the low-level auto-alert which will cause the RadDetect to automatically flash and beep once (in sync) every 2 seconds. The flash is emitted by the red LED light on the front of the unit. The RadDetect’s alarms will flash and beep (in sync) increasingly faster as your radiation exposure rate rises. The RadDetect’s alarms will flash and beep (in sync) decreasingly slower as your radiation exposure rate drops and will stop alerting when the level drops below the 75 mR/hr level. Demo video #2 (1.58mb wmv)
Directional Feature: An unmatched benefit of the real-time auto-alert capability of the RadDetect (not capable by other keychain–style radiation detectors) is that by holding the RadDetect vertically with the gray diagnostic button facing you and slowly turning in a circle, you are able to monitor the real-time increasing/decreasing auto-alert rate (as described above), allowing you to determine the direction from which the radiation is coming. This allows you to move in the other direction away from the radioactive source. This feature is possible because the microprocessor samples the air 32,768 times a second and gives you instant feedback of the current radiation levels. We do not recommend you use the RadDetect to locate the radioactive source (although could be used for that purpose), but instead use your RadDetect to quickly locate a safe location away from the source of radiation. Demo video #1 (1.96mb wmv)

Diagnostic Alert

If the diagnostic button is quickly pressed and released when the RadDetect is auto-alerting you to the presence of radiation (as described above), the ‘flash and beep’ auto-alerts will pause momentarily. At which point the red LED light on the front of the RadDetect will flash at different rates (view chart below) to alert you to your current minimal level of radiation exposure measured in Roentgens per hour (R/hr). This LED ‘exposure-level’ alert is flashed each time you press and release the diagnostic button. (No audible alert will be heard). After the release of the button the RadDetect will then revert back to the beeping/flashing auto-alert mode (as described above).

Diagnostic Alert Radiation Level
(Press Gray Diagnostic Button)

Low: LONG - LONG    (75mR/hr - 1R/hr)
1 second flash - pause - 1 second flash

Med: LONG - SHORT   (1R/hr - 9R/hr)
1 second flash - pause - ¼ second flash

High: SHORT - SHORT   (9R/hr - 2000R/hr)
¼ second flash - pause - ¼ second flash
Note: During normal function (no radiation present) the RadDetect’s functionality can be confirmed by pressing and holding the gray diagnostic button. The microprocessor will illuminate the red LED and will turn it off when the diagnostic button is released. No audible alert will be heard.