The product is mainly used to measure the water loss and mud cake thickness of drilling fluid after the loss of water. It is widely used in all the big oil fields, oil fields exploration and analysis as well as measurement of drilling fluid in the laboratory. It has the characters of simple operation, convenient use, good stability and small repetitive error in water loss measure. Technical parameters: Max Working pressure in drilling fluid room: 1Mpas Working pressure: 0.69Mpa Filter loss area: 45.6±0.5cm2 Slurry Cup capacity: 240ml