Bomb Calorimeters


  • Microprocessor based systems with Touchscreen Operation
  • Removable Bomb & Bucket Technology
  • High precision Temperature Measurement
  • Automatic Oxygen Filling Facility


    Parr Instruments company has been designing & manufacturing Oxygen Bomb Calorimeters to meet the needs of today’s research and fuel testing laboratories for determination of Gross Calorific value of variety of Solids & Liquid fuels (Coal, Coke, Petrol, Diesel and other alternate fuels), Minerals, Feeds, Foodstuff, Animal & Human Nutrition, Combustible Waste/ Materials & many more applications.

    Parr 6000 series Oxygen Bomb Calorimeters feature high degree of automation with touch screen operation, Linux operating system and fifth generation microprocessor control. Parr 6000 series has variety of models employing removable as well as fixed bomb and bucket designs.

    Bomb calorimetry is a fundamental test of great significance to anyone interested in calorific measurements. The following list includes possible applications:


    • Coal and coke, all varieties and types
    • Fuel oil, both heavy and light varieties
    • Gasoline, all motor fuel and aviation types jet fuels, all varieties
    • Combustible wastes and refuse disposal
    • Foodstuffs and supplements for human nutrition
    • Forage crops and supplements for animal nutrition
    • Building materials
    • Explosives and heat powders
    • Rocket fuels and related propellants
    • Thermodynamic studies of combustible materials
    • Energy balance studies in ecology
    • Instruction in basic thermodynamic methods


    Isoperibol Calorimetry

    An isoperibol calorimeter is one where the surrounding jacket is maintained at a constant temperature while the temperature of the bomb and bucket rise as heat is released by the combustion.

    Continuously Compensated Calorimetry

    Unlike isoperibol calorimetry the temperature of the jacket is continuously monitored and real time heat leak corrections are applied based upon the temperature difference between the bucket and the actual temperature of the jacket.

    Compensated Calorimetry

    In these calorimeter systems, the heat leak is precisely measured during the calorimetric pre-period. This evaluation results in an estimate of the effective, average temperature of the calorimeter surroundings. This temperature value is then used throughout the test interval to provide the calorimeter heat leak correction.

    Removable Bomb & Bucket Technology

    Removable bomb calorimeters are the more traditional design most users will recognize. In this design the oxygen bomb and bucket are removed from the calorimeter for loading the sample and filling the bucket with the carefully measured amount of water which absorbs the energy released in the combustion.

    Fixed Bomb & Bucket Technology

    In the fixed bomb and bucket design used in the 6400 Automatic Isoperibol Calorimeter, the bomb and bucket are not removed from the calorimeter during routine operations. This design concept has made it possible to offer unique levels of automation for the entire calorimetric determination not just the data collection and reporting steps. The result of this automation will save approximately five minutes of operator time per test when compared to any removable bomb calorimeter.

    ASTM E144

    Parr Instrument Company certifies that all vessels have been tested in accordance with ASTM E144, as required.


    6400 Automatic Isoperibol Calorimeter

    Designed for laboratories that require high through-put, the 6400 Automatic Isoperibol Calorimeter features a closed loop cooling subsystem and the highest automation in a calorimeter. The patented Quick Twist-Lock vessel closure design allows one operator to run up to four 6400 Calorimeters simultaneously.

    6200 Isoperibol Calorimeter

    Featuring a removable bomb and bucket design, the Parr 6200 Isoperibol Calorimeter is our most popular calorimeter. It is a good choice for high precision quality control work and for research and development. Multiple bomb choices are available, expanding its functionality.

    Model 6100 Compensated Jacket Calorimeter

    The Parr 6100 Compensated Calorimeter takes advantage of the real time, continuously corrected method originally developed by Parr Instrument Company. This real time correction can produce superior results. This feature will make it attractive for coal testing, waste and refuse disposal work, and other sample testing.

    6050 Compensated Jacket Calorimeter

    This new calorimeter is the first designed by Parr to be controlled by your own personal computer allowing access to the calorimeter’s functions and tests. This new moderately priced, compact calorimeter combines a static jacket system with the convenience of automated oxygen filling.

    1341 Plain Jacket Calorimeter

    A reliable calorimeter, the 1341 can be used for the same broad range of solid and liquid combustible samples as our other more advanced calorimeters. Its modest cost and simple design make the model suitable for low throughput and minimal precision work such as sample screening and student instruction.

    6725 Semimicro Calorimeter

    The 6725 Semimicro Calorimeter is a compact, static jacket, calorimeter designed specifically for measuring the heat produced by the combustion of small samples. The small sample capacity is ideal for marine biology research as well as other applications where the available sample is limited.

    6755 Solution Calorimeter

    The 6755 Solution Calorimeter is designed for laboratories who wish to measure enthalpy changes produced by chemical reactions in solution.

    6765 Combination Calorimeter

    The 6765 Combination Calorimeter provides all of the equipment for running both solution calorimetry and semimicro oxygen bomb calorimetric tests. This is a valuable multi experiment system for physical chemistry instruction. Conversion sets are also available to add the second operating mode to either the 6725 Semimicro Calorimeter or the 6755 Solution Calorimeter.

    6765 Combination Calorimeter


    Standard ASTM Test Methods
    • ASTM D240, “Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter”
    • ASTM D4809, “Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter (Precision Method)”
    • ASTM D5468, “Standard Test Method for Gross Calorific and Ash Value of Waste Materials”
    • ASTM D5865, “Standard Test Method for Gross Calorific Value of Coal and Coke”
    • ASTM E711, “Standard Test Method for Gross Calorific Value of Refuse-Derived Fuel by the Bomb Calorimeter”
    International Standard Test Method

    ISO 1928, “Solid mineral fuels -Determination of gross calorific value by the bomb calorimetric method, and calculation of net calorific value”

    Australian Standard Test Method

    AS1038.5, “Coal and coke — Analysis and testing — Gross calorific value”

    British Standard Test Method

    BS1016, “Methods for analysis and testing of coal and coke. Total moisture of coal”

    German Standard Test Method

    Din 51 900, “Determination of Gross Calorific Value of Solid and Liquid Fuels by the Bomb Calorimeter and Calculation of Net Calorific Value”

    Japanese Industrial Standard Method

    JIS M 8814 “Determination of Calorific Value of Coal & Coke”


    ISO 9001-2008 Certification

    Parr Instrument Company’s overall Quality Assurance System has been certified to be in compliance with ISO 9001-2008 by TÜV. ISO 9001-2008 covers the overall quality assurance and management compliance aspects of Parr’s activities as opposed to the certification of an individual product.

    CSA Certification

    Where appropriate, Parr calorimeters are manufactured and certified to the electrical code established by the Canadian Standards Association. The CSA logo is shown on the nameplate of each CSA certified unit.

    CE Certification

    Where appropriate, Parr Calorimeters will carry the CE mark certifying compliance with the E.C. Directive 2004/108/EC for EMC compliance, E.C. Directive 2006/95/EC for low voltage electrical safety, and E.C. Directive 2006/42/EC machinery directive.