A Low-Cost pH Sensor Based on RuO2 Resistor Material
作者： Libu Manjakkal , Katarina Cvejin , Jan Kulawik , Krzysztof Zaraska , Dorota Szwagierczak
DOI: 10.4028/WWW.SCIENTIFIC.NET/NH.5.1
关键词: Resistive touchscreen 、 Electrical engineering 、 Wireless sensor network 、 Optoelectronics 、 Resistor 、 Nernst equation 、 Screen printing 、 Materials science 、 Electrode 、 Electromotive force 、 Electrochemical cell
摘要: Fresh water deficiency caused by climate change calls for employing novel measures to ensure safety of drinking supply. Wireless sensor networks can be used monitoring hydrological conditions across wide area, allowing flow forecasting and early detection pollutants. While there are no fundamental technological obstacles implementation large area networks, their feasibility is constrained unit cost sensing nodes. This paper describes a low-cost pH sensor, intended use in fresh monitoring. The was fabricated standard thick film process, an off-the-shelf resistive paste as material. For the fabrication RuO2 screen printed on alumina substrate with silver conducting layer. Test solutions ranging from 2 10 were prepared HCl or KOH solutions. potential difference between reference electrode (electromotive force emf electrochemical cell) should proportional solution according Nernst equation. exhibits Nernstian response pH. Influence storage performance also investigated.
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