Since 1899, Parr Instrument Company has been a trusted leader in the design, manufacture, and sale of high-quality laboratory instruments for chemical research and testing under heat and pressure.

Parr’s extensive product line includes stirred reactors, pressure vessels, and high pressure tubular reactors—engineered for both catalytic and non-catalytic reactions in batch, continuous-flow, and multi/parallel operations. These systems are used in the chemical, pharmaceutical, polymer, biofuels, hydrometallurgical, petroleum, and petrochemical industries.

In addition to standard products, Parr excels in the development of custom-built reactor systems, tailored to meet specific customer requirements and research applications.

Parr oxygen combustion calorimeters used to determine the heat of combustion in solid, liquid, and refuse-derived fuels. These instruments are widely used in the energy, educational, coal, and fuel analysis industries.

Parr also offers sample preparation vessels for extraction, digestion, and hydrothermal synthesis, along with a line of vessels designed for cell disruption by nitrogen decompression.