Mettler Toledo is a global leader in manufacturing industrial weighing equipment and analytical instruments across ultrapure water, tool, and liquid process applications. The company provides process instrumentation for measuring pH, bioburdens, oxidation-reduction potential (ORP), dissolved oxygen, conductivity, sodium, silica, and gases. Thornton, acquired by Mettler Toledo in 2000, pioneered the first concentric restivity sensors for the semiconductor industry. The company also develops control systems for applications such as slurry-mixing for wafers.