An AEP 2160 contamination rate meter. This portable unit, equipped with a rechargeable battery, measures 28 cm by 16.5 cm at the base. There is a detection unit mount at the top of the chassis but no detector was received with the unit. The front panel has a switch for usage in detecting alpha as well as gamma and beta radiation and a second switch allowing a choice of time constants. Hence, it is probable that a number of different detection units could be used with this power and readout unit. Output to a microphone or to a chart recorder is also available.