The Model 329-32 Laundry Contamination Monitor is intended for automatic monitoring of both alpha and beta gamma contamination on clothing or other light articles presumed to be free of  radioactivity, or within release or reuse limits. A conveyor belt carries articles between two gas proportional detector arrays. An audible alarm will sound when contamination exceeds the given alarm setpoint. A light-emitting diode (LED) array spans the width of each end of the laundry monitor. The LEDs show the position of the alarm on the conveyor, and provide the operator with the status of the machine.