The quality of fresh concrete is significant for the stability and lifetime of concrete buildings. Most important parameters are water content and the W/C-value to reach the requested quality. So far a sample had to be dried first and then be determined with protocols on the water content as well as the W/C-value. This process was as cumbersome as time consuming. With SONO-WZ you define the water content of the fresh concrete fast on-site. You just put the spear tube into the material and receive reliable measuring results within 1-2 minutes.