Which method is used to determine inadequate coverage of concrete reinforcement?

The pachometer is specifically designed for locating and determining the depth of reinforcements within concrete structures. This method employs electromagnetic principles to detect the presence of metal objects, such as steel rebar, providing valuable information about the arrangement and coverage of concrete reinforcement. When assessing the reinforcement coverage, a pachometer can identify areas where the concrete may not adequately cover the reinforcing steel, a crucial factor for structural integrity and durability.

In contrast, the other methods listed serve different purposes. A moisture meter is used to measure the moisture content within materials, which is not relevant to determining reinforcement coverage. Sonic testing involves the use of sound waves to evaluate the integrity of concrete but does not specifically indicate the presence or depth of reinforcement. A field ohmmeter is typically employed to test the electrical resistance of materials or components, which is not applicable for assessing concrete reinforcement coverage. Thus, the pachometer stands out as the appropriate choice for this assessment.