Covert Radiation Monitor
These miniature devices covertly detect plutonium, uranium, and other fissile materials used in the making of nuclear weapons. By detecting gamma ray emissions, this device can be used to monitor proliferators who might use shielding to avoid detection by other types of monitors. Both powered and passive versions are being developed. Another potential use is a monitor for "dirty bombs" placed within containers on board ship or carried by truck. When combined with a power source data can be read remotely.