This standard specifies the terms, definitions, forms and basic parameters, requirements, inspection conditions, inspection methods, test methods, marks and Encasements for vernier tooth thickness calipers, with table tooth thickness calipers and digital display tooth thickness calipers. It is suitable for tooth thickness calipers with scale intervals of 0.01 mm and 0.02 mm, and the measurement gear modulus ranges from 1 mm to 55 mm. The standard covers key performance indicators such as Response Speed, MPE (MPE) of these calipers to ensure their accuracy and Reliability in practical use. In addition, the standard also refers to relevant environmental tests and electromagnetic compatibility tests to ensure the Stability and durability of equipment under different environment conditions.