Abstract: A Hall effect device with coaxial cable structure is proposed. When the central conductor passes

through the current，the potential difference between the inside and outside surfaces of the conductor shell through

current is generated. We discuss the dependence of the potential difference on the currents through the central

conductor and the conductor shell and the sizes of the conductor shell，and find that the maximum value of the Hall

potential difference appears as the conductor shell is very thin.

Key words: Hall effect, coaxial cable structure, conductor shell