Magnetostrictive probe fuel quality sensor retrofit assembly

A method of installing a fuel quality sensor with a fuel level probe in a fuel storage tank, said method comprising the steps of:

• extending an isolation sheath over a shaft of said probe, said isolation sheath defining at least one longitudinal passage between said isolation sheath and said fuel level probe shaft;
• coupling said fuel quality sensor with a terminal end of said fuel level probe shaft;
• providing a product-level float along said isolation sheath for measuring the level of fuel in said fuel storage tank, said product-level float configured to translate along said isolation sheath;
• and
• extending wiring between said fuel quality sensor and said tank interface along said at least one longitudinal passage.

A fuel level probe for use with a fuel storage tank, said fuel level probe comprising:

• a shaft extending through a tank interface into said fuel storage tank, said shaft comprising a longitudinal magnetostrictive element;
• a fuel quality sensor coupled with a terminal end of said shaft in said fuel storage tank;
• an isolation sheath installed along said fuel level probe shaft between said fuel quality sensor and said tank interface;
• said isolation sheath defining a plurality of longitudinal passages between said isolation sheath and said fuel level probe shaft for carrying wiring extending from said fuel quality sensor out of said fuel storage tank;
• a product-level float for measuring the level of fuel in said fuel storage tank, said product-level float configured to translate along said isolation sheath;
• wherein said product-level float comprises at least one product-level magnet adapted for electromagnetic communication with said magnetostrictive element across said isolation sheath.