The Koster Moisture Tester is a useful and practical piece of farm equipment. It is easy to operate and gives direct percentage readings of Dry Matter and Moisture content of dry grain, high moisture grain, hay, silage and other materials. The tester unit consists of a portable electric dryer having thermostatically controlled heat. A screened bottom container (Specimen container) in which to weigh and dry the sample and a Koster Digital scale.