Device for locating the position of the separation between two mediums, and a receptacle and a detection process employing the device

摘要

A device locating a position of transition between respective layers of first and second fluids, the device comprising: proximal and distal ends, an immersible signal emitter positioned at the distal end, an immersible signal receptor also fixed at the distal end but separated relative to said signal emitter, and a gap separating said center and receptor to receive fluid, the receptor being arranged to receive a signal from said emitter through fluid in said gap and such that the characteristics of the received signal vary depending on the characteristics of the fluid in the gap, wherein the signal emitter and signal receptor are arranged on a common horizontal axis, wherein the signal emitter is a visible light source, and wherein the signal receptor is a mirror aligned at approximately 45 DEG from horizontal to deflect the light signal vertically upward to provide a signal directly visible by a person.