.Parr Instrument Company manufactures chemical reactors, pressure vessels, calorimeters, combustion vessels, and related equipment for lab use

Parr reactors and pressure vessels include both standard designs and custom-built equipment in laboratory and pilot plant sizes. Uses for this equipment are found in a broad range of chemical, petrochemical, pharmaceutical and biotech research, development and control laboratories

Parr calorimeters are used for testing a variety of solid and liquid fuels, foodstuffs and other combustible materials. Many unique designs and highly automated instrumentation have been added to its expanding lines of fuel testing instruments