Patent ID: 6418788
Filing Date: 2002-07-16
Classification: G01F,G01N

Abstract:
A liquid density/liquid level meter, comprising:a spring-float portion that includes a plurality of springs and at least one float, the plurality of springs constraining movement of the at least one float; a linear displacement transducer portion that includes a magnet and a plurality of Hall sensors; and a submersible head unit that is adapted to couple the spring-float portion with the linear displacement transducer portion, wherein, when the submersible head unit is immersed in a liquid, the spring-float portion moves causing displacement of the magnet, thereby interacting with the plurality of Hall sensors in a lateral slide-by manner, so as to produce a voltage that is linear with respect to the displacement of the magnet, wherein the plurality of Hall sensors are disposed on the linear displacement transducer portion such that the plurality of Hall sensors are substantially equidistant with respect to the magnet.