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9800CXi Calorimeter

Injection-Style Zero Hydrocarbon Emissions Calorimeter

Injection-Style Measurement Calorimeter

Zero Hydrocarbon Emissions

Our NEW COSA XENTAUR™ 9800CXi™ Calorimeter is a fast response, injection-style zero-hydrocarbon emissions calorimeter.  It can provide direct measurement of Calorific Heating Value and BTU with a measurement range 0-3000 BTU/scfh.  A real advantage with the 9800CXi calorimeter is that it can handle high sulfur concentrations with an H2 measurement option.

An injection-style zero-hydrocarbon emissions calorimeter is a specialized instrument used for measuring the calorific value of fuels and other combustible materials without emitting any hydrocarbons into the environment. It works by injecting a small sample of the material into a combustion chamber where it is burned, and measuring the heat produced by the combustion reaction.

Unlike traditional calorimeters that require the use of a constant flow of hydrocarbon fuel for ignition and operation, an injection-style zero-hydrocarbon emissions calorimeter uses an alternative ignition system that doesn’t produce hydrocarbon emissions. This allows for a more environmentally friendly testing process and eliminates the need for additional hydrocarbon fuels to operate the calorimeter.

  • Industrial PLC System, touchscreen HMI
  • High temperature combustion
  • Flameless / no flameouts
  • Built for indoor, outdoor, dirty, and corrosive environments
  • Precise measurement of air fuel ratio
  • Global service and repairs
  • Compact, sturdy O2 Cell is designed to be cost-effective, and for ease of maintenance and service
  • Internal sample system up to 50°C with options to 100°C or 150°C
  • Full measurement range 0-3000 BTU/SCFH without the need of a specific gravity meter


Key advantages to using our measuring principle, based on the Residual Oxygen Measurement Method, are its insensitivity to changes in ambient temperature, very fast response times with the ability to measure BTU values down to zero.  A small constant volume of sample gas is injected into a continuous flow of combustion air with each measurement cycle, providing a precisely maintained fuel/air ratio profile. The fuel air mixture is oxidized in the combustion furnace at 1000°C, and the residual oxygen concentration of the combustion sample is measured by a zirconia oxide sensor. The residual oxygen provides an accurate method of measuring Heating Value with optional measurement of Wobbe Index correlated to Specific Gravity of the sample gas. Higher temperature reduces maintenance of the instrument; varying temperature up to 1000°C.

U.S. Environmental Protection Agency (EPA) Regulations Updated

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On December 2, 2023, the U.S. Environmental Protection Agency (EPA) revealed its conclusive regulation aimed at significantly slashing methane and air pollution emissions originating from oil and natural gas operations. This comprehensive final measure, spanning over 1,600 pages, encompasses enhanced and updated standards for methane and other air pollutants from new, modified, and reconstructed sources. Additionally, it provides emissions guidelines to aid states in formulating plans aimed at curbing methane emissions from existing sources.  Download the EPA Fact Sheet

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Benefits of the 9800CXi injection-style zero-hydrocarbon emissions calorimeter include:

  • High Accuracy: Provides highly accurate results for measuring the calorific value of fuels, with a precision of +/-0.2%.
  • Fast Response Time: Has a fast response time, providing results within seconds, making it suitable for real-time monitoring and control of fuel quality.
  • Low Sample Volume: Requires a small sample volume, which reduces the amount of fuel required for testing and minimizes waste.
  • Wide Measurement Range: Has a wide measurement range, which makes it suitable for measuring the heating value of various liquid and gaseous fuels.
  • Easy to Operate: Is easy to operate, with a user-friendly interface and intuitive controls.
  • Durable: Made of high-quality materials and is designed for durability and long-term use.
  • Measures low BTU Gases
  • Low maintenance
  • Flameless / no flameouts
  • Measures Wobbe and CARI
  • EPA 40CFR63.670(j) Compliant
  • Direct Measurement Method (ASTM D-4891 Compliant)
  • Gross or net heating values
  • Small footprint
  • Rack or stand options available
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DOWNLOAD – Solutions for Flare Gas Flyer


The 9800CXi Calorimeter is a highly sensitive instrument used for measuring the calorific value of liquid and gaseous fuels. It is commonly used in industries where accurate measurement of the calorific value of fuels is critical. Some of the industries that use this calorimeter include:

  • Oil and Gas:  Used in the oil and gas industry for measuring the heating value of natural gas, propane, butane, and other fuels.
  • Petrochemical: Petrochemical companies use the 9800 BTU Calorimeter for measuring the calorific value of different feedstocks such as crude oil, coal, and biomass.
  • Power Generation: Used in the power generation industry to measure the heating value of coal, oil, and other fuels used in boilers and turbines.
  • Research and Development: The high sensitivity of the 9800 BTU Calorimeter makes it suitable for use in research and development laboratories for studying the properties of fuels and developing new fuel blends.
  • Environmental: Used in the environmental industry for measuring the heating value of waste materials for combustion and energy recovery.
  • Flare gas monitoring


The 9800CXi injection-style zero-hydrocarbon emissions calorimeter uses a patented heat flow principle to directly measure the heat of combustion of a gas sample. This is achieved by igniting the gas sample in an insulated combustion chamber, and then measuring the heat released during combustion.

The instrument measures the temperature rise of a cooling fluid that surrounds the combustion chamber and calculates the heat of combustion based on the amount of heat transferred from the combustion chamber to the cooling fluid. The amount of heat transferred is directly proportional to the calorific heating value of the gas sample.

The 9800 CXi calorimeter also measures the volume of gas consumed during combustion, allowing for the calculation of the BTU value of the gas sample. The BTU value is calculated by dividing the calorific heating value of the gas sample by the volume of gas consumed during combustion.


COSA XENTAUR™ Continuous Direct BTU, Wobbe Index, Heating Value, CARI Calorimeter
Process Insights 9610 CXC calorimeter
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