This is identical to the general purpose, Model 3 handheld analog ratemeter with the addition of an audible and visual alarm. The 3A is likewise known for its accuracy and long-lasting dependability. The analog meter comes in a variety of measurement ranges and units to support the external radiation detector selected. The aluminum cast instrument housing with its sealed battery compartment and accompanying metal handle offer an industrial robustness and quality that promote long-lasting protection and instrument life. A one meter (39 in.) straight type detector cable with “C” style connector is included in the price of the instrument.