RadEye NBR
Portable high-sensitivity gamma radiation monitor, Thermo Scientific

The RadEye™ NBR is a combination of the Thermo Scientific RadEye SX multipurpose meter and the FHZ 674 NBR detector. Even in case of large variations of the natural background during the search, very small contributions of artificial gamma radiation can be detected by a NBR detector (Natural Background Rejection). Especially for shielded or remote gamma sources, the RadEye NBR system will generate unambiguous audible and visual alarm indication within seconds, even if the incremental dose rate is just in the order of 0,01 µSv/h or less.

Compared to the well-known system FHT 40 NBR, battery operation time has been increased by 5 times, weight has been reduced by 1 kg and, as an additional feature, the possible presence of artificial radiation is indicated on a 0 to 200 %-scaled bar graph (100 % = NBR alarm set point). This feature is extremely helpful during any active search mission. Furthermore, following multiple user suggestions, the audible indication for positive detection of artificial radiation is now well distinguished from the typically much more frequent gross gamma alarms that are caused by changing background conditions. Unlike the FHT 40 NBR, where the dose rate range is extended up to 1 Sv/h (FH 40 G-10 as control unit), the RadEye NBR dose rate range is limited to 100 µSv/h. For higher dose rates, the use of an additional gamma survey meter (e.g. the RadEye G-10) is recommended.

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