HomeSamplersPowders and granulesModel A Model A Designed for sampling from the bottom of a transfer screw Categories: Samplers, Powders and granules Tags : Automatic, In-line, Model A Product ID: 20746 Description Description This Model A sampler is designed for sampling powders, granules, grains and seeds. It can be installed either on a screw conveyor or on an inclined gravity chute.