Concrete thickness detector

The utility model relates to the aspect of concrete detection, in particular to a concrete thickness detector. Comprising a sleeve part and a measuring rod, the sleeve part comprises a guide sleeve and a bottom plate, the guide sleeve is a cylindrical tubular body, a round hole corresponding to the size of a pipe opening of the guide sleeve is formed in the center of the bottom plate in a penetrating mode, the bottom plate is coaxially and fixedly connected to the bottom of the guide sleeve, and the measuring rod is a cylindrical rod body and inserted into the guide sleeve. The measuring rod can freely slide in the guide sleeve, the diameter of the measuring rod is matched with the inner diameter of the guide sleeve, and scale values are arranged on the measuring rod. The device is simple in structure, high in reliability, convenient to carry and reusable, the size of the bottom contact surface of the device can be adjusted according to the actual concrete surface condition, and the measurement precision is i