초록 ▼

A liquid level monitoring system for underground storage tanks includes a submersible monitoring pipe having telescoping sections that are spring biased to an extended position enabling the pipe to be self-mounted within the tank between its upper and lower walls adjacent to and offset axially from

A liquid level monitoring system for underground storage tanks includes a submersible monitoring pipe having telescoping sections that are spring biased to an extended position enabling the pipe to be self-mounted within the tank between its upper and lower walls adjacent to and offset axially from a selected axis opening in the tank, such as the discharge opening which normally accommodates the pump for the tank. The pipe houses an electronic level sensor which is coupled to an above ground control system via conductor wires. A tank adapter is secured to the tank opening and provided with a passage through which the conductor wires extend for routing out of the tank without interfering with the clearance normally provided for insertion and removal of the pump.

대표청구항 ▼

In a product level monitoring system in combination with an underground storage tank for use in continuously registering the level of liquid in said underground storage tank, the tank having upper and lower walls and a vertically axially extending riser with an access riser opening in the upper wall

In a product level monitoring system in combination with an underground storage tank for use in continuously registering the level of liquid in said underground storage tank, the tank having upper and lower walls and a vertically axially extending riser with an access riser opening in the upper wall of the tank, surrounded by an upper wall marginal interior surface, for gaining access to the tank from an above ground elevation; a) a removable, longitudinally extending pipe assembly carrying a liquid level sensor disposed within said tank vertically between said upper marginal interior surface and lower wall laterally adjacent to but laterally offset from said riser and riser opening; b) wherein said pipe assembly includes telescoping members, and a biasing device urges said members to an expanded position to maintain the pipe assembly in captured position between the upper and lower walls of said tank; c) a connector wire system including sensor conductors leading from said sensor and pipe assembly up through said pump riser opening; and d) an electronic control system above ground to which said connector wire system is coupled to enable the determination of the liquid level in the tank.