One of today's most popular building material is concrete. This building material is not only well-known and commonly used, but also time-tested. And concrete building and high-rise buildings with their huge loads on the base and the shell of atomic reactors and storage of toxic waste. However, latent defects in concrete and reinforced concrete structures can be fatal and lead to serious economic, environmental and even humanitarian losses. Most often, the defects of constructions and structures are not caused by one factor, but as a result of their total effect, with a marked influence of any factor may cause increased effects of other factors. Defects found during the survey are divided into the following groups in order of importance: the defects that lead to the reduction and loss of load-carrying capacity; partially reducing the bearing capacity with a change in geometric dimensions; deviations in the geometrical dimensions while maintaining load-carrying capacity, causing unfitness for technical operation. Durability and stability of building structures depends quality of elements made of concrete or reinforced concrete. In practice, there is often a concrete examination methods cannot be used for in-depth assessment of quality of concrete structures for various reasons: because of the lack of bilateral access for measurement, because of the cramped conditions, inability to use destructive methods of control and need to be adapted to the conditions of the construction site with taking into account the structure of a particular product. This paper proposes a method for increasing the depth sounding at Concrete pipe coating by changing the distance between the points of acoustic contact. On the basis of experimental data derived from the dependence of the sensitivity of the instrument sounding base. Changing the design of the device holding the cone transducers, and the proposed scheme preliminary marking the concrete surface to minimize unexplored areas of concrete in a controlled area and increase the ka-operation control operations and thereby improve the reliability of the structure under construction.