Abstract: A microfluidic device comprising at least one test channel, which test channel comprises an upper test channel section with an upstream end and a sampling region at its upstream end and at least one reference channel, which reference channel comprises an upper reference channel section with an upstream end and a sampling region at its upstream end. The test channel and the reference channel comprise a merging region downstream to the upper test channel section and a common downstream channel section. The merging region and the common downstream channel section are arranged such that a reference liquid flowing from the upper reference channel section into the merging region will block a test liquid flow in the upper test channel section when the test liquid flow has not yet reached the merging section. The microfluid device may be used for detecting change of flow properties e.g. due to agglomeration, agglutination or viscosity change in a liquid preferably selected from water, urine, blood, or blood plasma.

Abstract: A microfluidic device comprising at least one test channel, which test channel comprises an upper test channel section with an upstream end and a sampling region at its upstream end and at least one reference channel, which reference channel comprises an upper reference channel section with an upstream end and a sampling region at its upstream end. The test channel and the reference channel comprise a merging region downstream to the upper test channel section and a common downstream channel section. The merging region and the common downstream channel section are arranged such that a reference liquid flowing from the upper reference channel section into the merging region will block a test liquid flow in the upper test channel section when the test liquid flow has not yet reached the merging section. The microfluid device may be used for detecting change of flow properties e.g. due to agglomeration, agglutination or viscosity change in a liquid preferably selected from water, urine, blood, or blood plasma.

Abstract: A brush 1 for washing objects such as automobiles and having a handle 2 and a body 3 with a compartment 4 for receiving washing fluid such as water and a number of brush tufts 5. A passage 7 allows introduction of water into the compartment 7 and is covered by a sheet 9 of flexible material such as rubber such that water may enter the compartment when the brush is submerged in water 8 but is prevented from exiting the compartment by the plate 9 when the brush in use for washing an object. Passages 11a are provided for allowing water to exit the compartment to the tufts 5 for washing. A ventilating passage 12 is provided for allowing air to exit and enter the compartment 4 when water enters and exits the compartment 4, respectively.