Drawing samples and testing them for conformity with preset quality standards allows manufacturing units to produce a consistent quality of the product. In a batch process, sample testing systems ensures that each batch meets the specified standards. In a continuous process, product and materials testing helps in the early identification of quality issues, saving significant time and resources, and preventing a sub-standard product from reaching the market. The selection of industrial testing equipment depends on the identification of key quality parameters. These parameters may include volume, weight, viscosity, hardness, particle size distribution, sterility, gauge and containment, among other parameters. Testing machinery need regular calibration to ensure that the parameters being tested are accurate. Some of the more common testing solutions include thermal imagers, scratch testers, optical inspectors and texture analyzers.