SE International Inc designs, manufactures, and distributes radiation detectors under the Radiation Alert^® brand. They engineer their instruments to be reliable, affordable, and intuitive. SEI provides a diverse line of Geiger survey meters, radiation area monitors, radiation spectrum analyzers, software, and apps. Since 1979, they have helped protect the safety of people, facilities, and the environment with our line of nuclear radiation detectors. Compact handhelds offer high sensitivity to multiple types of ionizing radiation detection including alpha, beta, gamma, and X-ray radiation.