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O2 Control

OXYPro O2 Control

The main points

  • Temperature resistance up to 350°C
  • Universal standard length thanks to scaling
  • Suitable for all burner types and heat generators
  • Fast and easy to retrofit without calibration and external power supply
  • Space-saving module instead of a technology cabinet
  • Ambient air pressure sensor corrects the O2 content measured
  • Compatibility with other control systems
  • Very short amortization times of two years possible

Minimum O2 excess – reduced flue gas loss

The ambient conditions of a combustion plant change from day to day and from summer to winter. The temperature of the combustion air and oil are subject to especially strong fluctuation, as are relative humidity, oil viscosity, the heat value of the fuel gas and atmospheric pressure. The flame of the burner is directly affected by these changes. It is therefore set during commissioning so that even under very unfavorable circumstances there is enough oxygen present for complete burnout. This setting is inflexible and is based on the assumption that all unfavorable circumstances coincide. In most cases, however, such a setting is excessive and the flame receives more atmospheric oxygen than necessary.

A "safety air excess" protects against impermissibly fluctuating conditions, but is very expensive: The excess air results in increased flue gas losses and also consumes unnecessary electrical energy. These losses account for 1-2% of the fuel that is used on average. They represent an additional load not only for the budget, but also for the environment.

If the combustion plant has electronic fuel-air compound control, the remedy is simple. O2 control can generally be fitted with little expense. The additional component consists essentially of a lambda probe (an oxygen sensor) together with an analyzing unit: The probe mounted in the flue gas channel continuously records the residual oxygen content in the flue gas and sends the corresponding signal to the burner control system. The control system can then respond appropriately, regulating the amount of air and limiting it to what is absolutely necessary. 

O2 Measurement-System

The SAACKE O2 control detects the actual excess oxygen in the exhaust gas and makes sure that the fuel-air ratio is continuously adjusted to the related load to ensure optimal combustion. That way, the efficiency of your combustion plant can be increased by approximately one percent versus a traditional combustion plant with increased excess air while, saving up to two percent of fuel.

The optimization measures consist of the plug-and-play O2 probe, the measured gas sampling device as well as the Interface Module se@vis IO OX4641. The measuring system is characterized by the following advantages: It is suitable for all burner types in light oil and gas operation (natural and biogas), is low in maintenance and has a long service life. Continuous limit value monitoring significantly improves the safety of the plant. As the O2 control regulates fluctuations in the fuel and in the combustion air while minimizing the excess O2 for each output level, the average amortization period is less than two years. It stands out when compared to competitors due to a higher measuring precision and higher temperature design for up to 350 °C exhaust gas temperature. Data can be exported digitally anytime via the SAACKE se@vis burner control.