Mainly including temperature measurement and material thermal property measurement. Temperature measurement can be divided into high temperature measurement, medium temperature measurement, and low temperature measurement. Thermal properties are important engineering parameters, and thermal property measurement includes aspects such as thermal conductivity, thermal expansion, thermal diffusion, specific heat capacity, and thermal radiation characteristics.

Stoichiometry includes the calculation of reactant and product quantities, chemical equilibrium, chemical reaction rate, and energy in chemical reactions. It involves many physical quantities, units, and symbols.

Electromagnetic metrology is a branch of metrology that applies electromagnetic measuring instruments, meters, and equipment to quantitatively analyze the measured quantity using corresponding methods, and studies and ensures the unity and accuracy of electromagnetic measurement. The main research contents include: precise determination of physical constants related to electromagnetic quantities, determination of electromagnetic unit system, research, reproduction and preservation of measurement standards and benchmarks for electromagnetic units according to definitions, study of measurement methods for electromagnetic quantities, research of standard measuring tools and specialized measuring devices for transmitting electromagnetic quantity values, and research and development of corresponding calibration systems, calibration regulations, technical specifications and other technical regulations.

Mechanical metrology mainly includes measurement tests such as mass, force value, torque, hardness, pressure, vacuum, vibration, impact, rotational speed, constant acceleration, flow rate, flow velocity, and capacity.

As an important component of modern metrology science and technology, length measurement mainly studies the geometric quantities that characterize the size, length, shape, and position of objects. Its basic parameters are length and angle, with length measured in meters and angle divided into plane angle and solid angle, with units of radians and sphericity, respectively.