The Brookfield PVS is a coaxial cylinder, controlled shear rate rotational rheometer used in pressurized applications at temperatures where sample boiling presents a problem. The PVS can be used to simulate the processing conditions of small liquid samples in a laboratory bench environment. Applications include chemical compounds containing volatile substances, the oil industry, drilling mud and fracturing fluids, processed foods, polymers, and paints. Any testing sample that requires absolute viscosity measurement under completely enclosed conditions is suitable for measurement with the PVS rotational viscometer.