This Series machine adopts loading hydraulically with accurate and reliable test data. In order to guarantee the accuracy of test load readout, it adopts oil pressure transducer to measure the load, after amplifying, the test load, peak value and loading speed can be displayed digitally. The oil source is installed at the bottom of control cabinet in which there is a double-flow high-pressure piston pump driven by the motor. The hydraulic system is controlled manually with the functions of easy operation, safety and reliability. It is widely used for building material compression test.