To feed and separate samples automatically use the WHT 4-SM multi-batch feeder (shown on the left). The feeder is controlled by the master WHT 4 instrument. The WHT 4-SM multi-batch feeder system supports automated testing of up to ten different products or batches. As soon as all testing parameters for the samples have been entered the testing series can be started. The system operates with a speed of 10 to 15 samples per minute (depending on sample hardness). The sensor controlled separate vibration tracks are self-adjusted to ensure perfect sample separation and transport. The self-adjustment automatically corrects the vibration speed according to the samples weight, shape and size to minimize waste. The corrected speed is filed for the sample tested and automatically used when this sample is tested the next time.