Water penetration tester according to Karsten is used as a rapid testing procedure with regard to water penetration in building materials such as concrete, stone and plaster. The test consists of a glass tube (similar to the rilem tube) filled with water, bonded to the test material with plastiline.

Water pressure is then exerted on the surface. A graduated scale indicates, over time, the amount of water penetrated into the surface.

Tube Material: Glass, 0-4mL in 1/10th mL graduations