Patent ID: 7173506

Claim:
A gauge comprising: (a) a gauge assembly having (i) a gauge head; (ii) a support member extending from said gauge head; (iii) a transmitting shaft having a first end and a second end rotatable in said support member; (iv) a tank magnet attached to said first end of said transmitting shaft; (v) a float arm linked to said transmitting shaft such that movement of said float arm results in rotation of said transmitting shaft; (b) a dial assembly mounted on said gauge assembly having: (i) a first member having a pivot pin attached thereto; (ii) a dial magnet in magnetic &communication with said tank magnet and which is rotatably mounted on said pivot pin; (iii) a reed switch assembly positioned operatively adjacent to said dial magnet comprising: (iv) a reed switch; and (v) a bias magnet positioned such that said reed switch is held in the first position when the poles of said dial and bias magnets are in a first orientation and will be held in a second position when the poles of the dial magnet and bias magnet are in a second orientation.