Flat tube sheathed tubular heating elements are produced by Zoppas industries. The elements can be manufactured using various profiles and sheath materials, such as carbon steel, stainless steel, and Monel 400. Flat tube elements are more compact than the tubular type, thus leading to less volume and a better heat conductivity.
The elements can be used in heating substances with specific surface charges that can range from 1 to 10 W/cm^2. They are generally used for catering equipment and contact cooking.