This automatic electronic apparatus with microprocessor is equipped with an automatic air proof device. The apparatus consists of a flat enclosure with a manometer column and with 4 components stainless steel measuring cell. Depending to the cement porosity and its density, the equipment calculates automatically the masse that you have to test, determines the constant K according to standard cement, records the test results with possibility to elaborate an average value of different tests. RS 232 port. The defining of final Blaine value is automatically given by the apparatus. Supplied complete with accessories.