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Environmental detectors designed for automated discovery and/or ascertainment (i.e., detection) of ionizing radiation, usually in the form of gamma rays and/or alpha or beta particles. The sample is typically taken from the atmosphere, but water and/or particle samples are sometimes used. Ionizing radiation environmental detectors are available mainly as portable, handheld, or individually worn units; some detectors are computerized and detect, identify, and warn of a hazardous condition when predetermined values of radiation are reached or exceeded. These devices are used by healthcare personnel, rescuers, and firefighters in radioactive or potentially radioactive contaminated areas.
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