The Big Dipper® AP-6000-1-DR Series Alarm Probe is designed to provide an early warning that maintenance is required on Big Dipper grease collector systems. It may be easily installed in a grease collection barrel to signal when the collection barrel needs to be emptied. The AP-6000-1-DR alarm probe activates a warning tone to signal that the collection barrel needs to be emptied. This option is especially important when the Big Dipper unit is installed in basements or other “out-of-sight” locations.