The NFPA released the latest edition of Standard 86 (Standard for Ovens and Furnaces, 2019 edition), there was a significant change that affected the use and operation of burners in the baking industry. The NFPA 86 Standard governs the design and installation of the vast majority of the ovens used in United States bakeries. This requirement is the standard in bakeries located in many other parts of the world. This change requires that any burner with a flame space exceeding 3' (1m) be equipped with the flame sensing element on each burner be located at the opposite end of the burner from the point of ignition.
8.10.6 A line burner, pipe burner, or radiant burner with/lames propogoting 3/t (1 m)
or longer shall have at least one flame detector installed to sense burner flame at the
end of the assembly farthest from the source of ignition.
Flynn has been using far side flame sensing for over 30 years.
Now in 2019 as this requirement finally becomes code in the US,
you can take advantage of those 30 years of trusted designs.