Thickness gauge

The utility model discloses a thickness gauge, which belongs to the technical field of coating detection and comprises a shell, a circuit board and a measuring head assembly, the circuit board and the measuring head assembly are arranged in the shell, the shell is provided with a display screen electrically connected with the circuit board, a measuring head in the measuring head assembly is slidably connected with a base, and the measuring head is connected with the circuit board through a plurality of strands of enameled wires. During measurement, the elastic deformation of the lead part, connected with the circuit board, of the multi-strand enameled wire is small, so that parasitic inductance generated by the elastic deformation of the lead is small, the measurement accuracy of the thickness gauge is improved, meanwhile, the tin foil paper layer is arranged on the inner wall of the shell of the thickness gauge and used for shielding the interference of the hand on the thickness gauge, and the measurement ac