The sample spear is pushed into the product using the remote control. When this takes place, a proper cross-sectional sample is pushed into the inner tube chamber of the sample spear. The Rekoraf operates using the patented Convac air circulation system. No suction effect is applied to the product. No lightweight fractions (e. g. broken grain, dust and dirt) are drawn in from the immediate vicinity. The air flow only takes the sample which is present in the sample spear and transports it to the weighing room or a laboratory through a PVC hose. There the sample is separated from the air in the reception box (collection container), emptied and is ready for quality control.