Patent ID: 7675212

Claim:
A sealing device comprising: a first annular member attached to any one member of a shaft and a housing which are rotatable relative to each other coaxially; a second annular member attached to the other member of said shaft and said housing; a seal portion provided between said first and second annular members and sealing an annular gap between said two members, said seal portion including at least one seal lip, another at least one seal lip and a labyrinth seal portion; a magnetized detected portion, to be detected by a detecting means provided in a no sealed fluid side, being provided in a sealed fluid side of said first annular member, whereby a relative rotation of said two member is detected, and an arrangement of said at least one seal lip, said magnetized detected portion, said another at least one seal lip and said labyrinth seal portion being progressively arranged in a radially outward direction from said shaft.