Horiba Instruments Inc. is a manufacturer of analytical instrumentation for particle characterization, sulfur-in-oil, water quality and pH. Products include: laser light scattering and sub-micron, high-concentration particle size analyzers; centrifugal sedimentation particle size analyzers; static-volumetric gas adsorption and dynamic flow surface area analyzers; mercury porosimters; sulfur-in-oil analyzers; oil content analyzers; water quality checkers; pH, DO, ION and conductivity meters; turbidity, conductivity and DO monitors. These instruments are used for environmental monitoring and testing for research and QC laboratory applications.