Simulated Gas Generator & Catalyst Test System

An increasing worldwide focus on environmental preservation has given rise to demands for cleaner automobile exhaust gas, focusing attention on automobile catalysts.

The HORIBA SIGU-2000 Series Simulated Gas Generator & Catalyst Test System generates simulated exhaust gas for various types of engines to allow comprehensive testing and evaluation of a variety of catalysts. This system increases R&D efficiency and reduces development time regardless of the scale of your laboratory facilities. The SIGU-2000 Series can also be used in combination with a variety of other measurement equipment for integrated testing applications to provide a total solution for clean engine catalyst development.


  • Independent flow control of the various source gases allows you to freely set the gas composition and flow rate. The test gas generator is used to generate the simulated engine exhaust gas. You can independently control the flow rates of the various source gases (CO2,H2, O2, NO, HC, N2, etc.) to set the gas composition and fl ow rate that yourequire.
  • The humidifier and programmable heater allow you to generate simulated exhaust gas for a wide variety of conditions. By adding water vapor to the gas mixture using the humidifier and heating with the temperature controlled reactor furnace you can generate simulated exhaust gas for a variety of engine types and air-fuel ratios.
  • Automatic operation and control using a host computer. The system can be interfaced to a host computer for remote control. This allows you to perform integrated catalyst evaluation tests in combination with other measurement equipment connected to the host computer.
  • Efficient testing and evaluation of catalyst performance.The SIGU Series allows you to effiiently test and evaluate catalyst performance from comparative analysis of the gas composition at the inlet and outlet of the catalyst and catalyst temperature data.
  • Adoption of the mass flow ratemethod eliminates disturbances due to external influences such as temperature and pressure variations.
  • A full complement of alarm functions ensures safe operation.
  • Uses a touch panel for easy operation.

SIGU Series

  • Principle of test gas generation: Controlling the mixing mass ratio of source gases
  • Control of source gas flow: Using mass flow controller
  • Source gas pressure: 200 kPa to 250 kPa
  • Composition of test gas: To be specified for each system
  • Concentration of test gas: To be specified for each system
  • Humidity of test gas: 0 vol% to 12 vol%
  • Control of test gas humidity: By adding water vapor, using liquid mass flow controller and vaporizer
  • Capacity of pure water tank: Approx. 2.5 L
  • Flow rate of test gas: To be specified for each system
  • Setting of mass flow controllers: Using digital controllers
  • Temperature range of oven chamber: 600: at inlet of test catalyst, 800: (option)
  • Controlling of temperature raising: Direct heating by infrared radiation, according to programmed sequences
  • Temperature raising speed: 10:/min to 50:/min, at inlet of test catalyst
  • Temperature measuring point: Inlet and outlet of test catalyst
  • Test catalyst size:Honeycomb-shaped, O.D. 25.4 mm x 50 mm, as standard (Other sizes are also available optionally, if specified at ordering)
  • Replacement of test catalysts: Can be replaced by operator
  • Sample port for gas analyzers: From inlet or outlet of test catalyst, switching by solenoid valve (1 line)
  • Perturbation test function: 1 Gas flow control: Controlling at mass flow controllers for source gases, or controlling injector at chamber inlet 2 Flow controlling range and source gas concentration: To be specified for each system 3 Setting parameters for perturbation test:
    t1: Test gas injection time 0 s to 300 s
    t2: Time span for each cycle 0.02 s to 300 s
    t3: Delay time for injection 0 s to 300 s
  • Power source: 120 V AC, single phase, 50/60 Hz 220/230/240 V AC, single phase or three phase, 50/60 Hz
  • Cooling water: Flow rate: Approx. 15 L/min
    Pressure: 300 kPa
    Temperature: under 35

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