A Method of Measurement of Permittivity and Opacity of Fluid

Abstract

Fluids play important role in wide variety of industrial, medical and consumer equipments. Many of the process system utilizes fluid supply, may be a small bottle of reagent in medical diagnosis, or a large tank of acid in chemical process, or a hydraulic system in machineries of various sectors. Fluid characteristics and quality are critical in automotive process and protecting equipments. Liquid properties like buoyancy, pressure at depth, electrical permittivity, conductivity, absorption of radiation, surface reflection of sound at light etc. are some of the parameters to be monitored in different types of design and applications. There exist various methods to measure these parameters where the sensors have to make contact with the liquids that have disadvantages in many applications. In this paper focus has been given to measure the permittivity as well as opacity of liquids in easy, non-contact type and conventional way.

Keywords: Permittivity, Electrical Conductivity, Dielectric Polarization, Electrostatic Field, Microcontroller, Light Dependent Resistor, Signal Conditioner.