RAM-100 Portable Radiation Detector esearch for the foundation, according to the nuclear emergency response monitoring technical requirements, specifically for nuclear medicine, molecular biology laboratory, nuclear material transportation and other alpha, beta and gamma radiation surface contamination and design, is a high sensitive intelligent portable instrument. It combines surface contamination monitor and gamma dose rate meter two the function of the instrument, which can be used for measuring the alpha, beta induced surface contamination, and can be used to measure the dose rate