These sites are from companies that make, manufacture, distribute or sale primarily lab instruments for material science testing, research or education. This section includes but is not limited to sites that make, manufacture, distribute or sale rheology instruments, viscometers, metal and concrete testing instruments, plastic drying, desiccant, drying, testing instruments for rubber, monomer, polymer, plastic materials, tensile testing, metal testing, metallurgy and various other sundry companies.

This category is for companies or individual laboratories specializing in performing tests on submitted samples, including mechanical, fracture and hardness testing, chemical and corrosion testing.