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Two New Sensors Based on the Changes of the Electromagnetic Field to Measure the Water Conductivity

Authors:
Lorena Parra
Vicente Ortuño
Sandra Sendra
Jaime Lloret

Keywords: conductivity; solenoid; copper coils; magnetic field; salinity.

Abstract:
Water salinity and conductivity values are always required when measurements from the sea water are needed (e.g., for water pollution, in marine fish farms, feeding industry, etc.). They can be measured directly or indirectly. In order to select the best option, three main issues should be taken into account. The first one is the periodic need of calibration because of the system wear, the second one is the cost of the components of the system, which could make to deploy an expensive device, and the third one is the accuracy of the deployed system. In this paper, we propose two cheap conductivity sensors that do not need periodic calibration. The first one of them is composed by a solenoid and a commercial magnetic field sensor that detects the changes in the magnetic field when different materials are introduced in the center of solenoid. The second one is composed by two overlapped copper coils that, through one of them, are circulating energy, and induce in the other one. The different environments of the coils produce changes in the induced voltage in the second coil.

Pages: 266 to 272

Copyright: Copyright (c) IARIA, 2013

Publication date: August 25, 2013

Published in: conference

ISSN: 2308-4405

ISBN: 978-1-61208-296-7

Location: Barcelona, Spain

Dates: from August 25, 2013 to August 31, 2013