This easy-to-operate instrument monitors radiation in hospitals, research labs, power plants and mines. Handheld and lightweight, the Model 4E monitor conveniently checks for contamination on countertops, clothing and equipment surfaces. The 4E radiation monitor offers good sensitivity, fast response and functional versatility. It detects alpha, beta, gamma and X-rays. The analog meter is scaled in CPM (counts per minute) or mR/hr (milli-Roentgens per hour), and the XI, X10, X100 switch extends the effective measurement range.