A sensor for the measurement of the level and volume of liquids is described. The device employs an array of point sensors, each of which is sensitive to the large changes in impedance between a conductive liquid and the gas above it. The device, in principle, will function in any liquid medium that can conduct an electric current without significantly perturbing that medium. It has in fact been successfully tested in aqueous solutions with conductivity ranging from 9.0×10−7 &OHgr;−1cm−1to 0.38 &OHgr;−1cm−1. The sensor is activated with either AC or DC applied voltage and used with electronic circuits having linear outputs. The sensor’s output is solution independent and a function of the number of conducting electrodes. The precision of the sensor is controlled by the spacing of its electrode array. The linear output of the sensor has been correlated linearly to solution volume regardless of the shape of the solution tank by the use of unequal spacing between the array electrodes. Several designs of sensors with fixed and adjustable precision are described.