STOCK TANK GAUGER-LEVEL CONTROLLER

摘要

ICR 6290 STOCK TANK GAUGER-LEVEL CONTROLLER Liquid level in tanks is gauged and can be controlled as follows. Liquid communication is provided from near the bottom of the tank to a liquid reservoir containing a liquid which is of different density and immiscible with the tank liquid. The reservoir is in liquid communication with a vertically elongated vessel having a relatively small horizontal area compared to the tank, communication being near the top of the reservoir if the reservoir liquid is less dense than the tank liquid and being near the bottom of the reservoir if the reservoir liquid is more dense than the tank liquid. The elongated vessel, which can be transparent or translucent so that the liquid level therein corresponding to the liquid level in the tank can be readily determined, can contain a float containing a proximity sensor triggering element. An array of proximity sensors can be positioned along the vertical vessel as needed for level control in the tank and connected to a controller which in turn is connected to valves and/or pumps controlling liquid level in the tank. The top of the vertical vessel can be in gaseous communication with the top of the tank or in communication with the atmosphere if the pressure above the liquid in the tank is equalized with atmospheric pressure.