In these devices an electronic stopwatch is mounted on the base plate. The cylinder support is connected to a crank with handle and can rotate in the block resulting in a flip-over of the container. The liquid recipient is located in the cylinder support, so that it can easily be replaced. A lid is mounted on the cylinder support by hinges and is secured on the cylinder by means of a locking mechanism. By rotating the ring by moving the handle a signal is given to the stop watch to start timing; at this moment the absorbency has started. At the end of the test a signal is given by the stopwatch. At this moment the ring is moved backwards and a signal is given to the stopwatch and timing is finished.
The tension of the locking spring enables testing of paper and cardboard with different thicknesses. Different versions of the tester are available for standard paper and board, tissue and other low structured materials, corrugated board and for non-standard sample sizes.

Inner Ø 112.8 mm, Max sample thickness 4 mm, Filling amount 100 ml, Test area 100 cm²