We supply highly reliable Viscosity Standards Conostan for petroleum analysis. Conostan manufactures these General Purpose fluids following ASTM D2162 standards. The manufacturer developed these mineral oil fluids to calibrate all viscometer types. Technicians use them for glass capillary and rotational viscometers. They also work perfectly with cup and falling ball viscometers. Conostan traces all standards directly to National Standards. They strictly follow established ASTM and IP testing methods. Each standard carries a reliable two-year stability guarantee. Technicians determine kinematic and dynamic viscosity values using ASTM D445 and D446. They also apply strict ISO 3104 and ISO 3105 testing methodologies. Conostan traces all these specific values directly to NIST. The manufacturer bases all calibrations on ASTM D2162 master viscometer procedures. They utilize the exact NIST water value at 20 °C. Our team also provides custom standards within this specific range.