The heavy-duty Apollo probe can be used with a variety of free-flowing materials, including grain, feed, chemicals, minerals and rice. Gamet Manufacturing, St. Paul, Minnesota, U.S., manufacturer of the Apollo probe, also offers sample testing, technical advice, installation and other services. The probe's rotating mast swings the sample head into position. Its large rotation arc and extendable boom allow samples to be taken at different probing points in the load. Samples are pneumatically conveyed from the load into a collector via the sample head, which is available in both core and compartment styles. Hydraulic power provides smooth operation and requires less maintenance. The probe, available in three sizes, is shipped with high-grade hydraulic fluid, a vacuum system, sample collection receiver and sample hose.