COSA 9800 Calorimeter


Our NEW COSA 9800™ 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 our COSA 9800 calorimeter is that it can handle high sulfur concentrations with an H2 measurement option.

  • Industrial PLC System, Touchscreen HMI
  • High Temperature Combustion
  • Flameless / No Flameouts
  • Built for Indoor, Outdoor, Dirty, and Corrosive Environment
  • Precise Measurement of Air Fuel Ratio

Additional Features

  • 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.

  • Zero Hydrocarbon Emissions
  • Fast Response Injection Style
  • Direct Measurement of Calorific Heating Value
  • BTU Measurement Range 0-3000 BTU/scfh
  • Handles High Sulfur Concentrations
  • H2 Measurement Option

Fast, Zero-Hydrocarbon Emissions Calorimeter

Process Insights_COSA 9800 calorimeter


  • Flare Stack Control
  • Fuel Optimization
  • Gas Blending
  • Custody Transfer
  • Flare Monitoring
  • Biogas
  • Natural gas
  • Refinery gases

Analyzer Construction

  • Housed in a painted stainless steel NEMA4X (IP66) cabinet with the dimensions 41” x 41” x 16” suitable for outdoor installations without additional temperature-controlled shelter
  • For extreme climate conditions, the standard operating temperature range can be extended with the addition of a cabinet heater and/or vortex cooler
  • Cabinet is suitable for wall mounting or rack mounting

The analyzer cabinet has three compartments:

  1. The Gas Mixing Compartment: Contains sample condition and the gas mixing system. Components in this compartment are intrinsically safe. The gas mixing compartment can optionally be heated to avoid condensation of heavier gas constituents.
  2. The Electronics Compartment: Contains the industrial PC based controller, which performs all instrument control functions and calculations. Results are available through isolated analog outputs and an LCD, which is visible through a cabinet window and displays residual O2 in %, cell voltage in mV, Wobbe Index and Calorific Heating Value (optionally) in BTU/SCF or MJ/Nm3, relative density (optional), and CARI (Combustion Air Requirement Index).
  3. The Combustion Furnace Compartment: Contains the combustion furnace with the zirconia oxide sensor. The exhaust gas is vented and drained. The electronics compartment and combustion furnace compartment can optionally be purged for Class 1 Div 2 or Class 1 Div 1 applications.


  • No moving parts 
  • Low maintenance requirements
  • Can operate unattended for several months
  • All compartments are easily accessible through separate doors on the front side of the enclosure


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