The Model DGA-410 Ashmeter is a registered nuclear gauging device for measuring ash weight percent of coal. The measuring portion of the device, which consists of a source and detector assembly, is normally mounted across a conveyor belt on the existing belt structure. The detector is connected to an electronics enclosure housing an industrial computer which processes the detector signals and displays the measured results to the operator. The Ashmeter generates ash weight percent and weight/density measurements every three seconds making it useful in online process and control applications. It can control the ETI model HSG1 High Speed Sort Gate for separating coal into different quality piles.