The Radalert 100 is designed for general purpose radiation monitoring and detects alpha, beta, gamma, and x-radiation. A highly accurate digital display shows readings in your choice of mR/hr, CPM, µS/hr, or CPS. Each pulse also registers visually (by LED) and audibly (which can be muted). A Total/Timer feature allows timed readings from one minute to 40 hours for precise measurement of low level contamination. An audible alert sounds when the radiation reaches a user-adjustable level.