Energetic particles play a critical role in determining the operation and survival of technology and humans in space, and in certain terrestrial environments. PSI's technology base in this area includes a wide range of detection schemes, instrumentation, and design experience. We develop custom sensors and systems for orbital, industrial, and medical applications. We also have a wide range of standard, proven designs. PSI technology ranges from high-performance sensors tailored to the science community, to low cost, compact radiation alarm sensors.