A strip-based total dissolved solids sensor for water quality analysis

IF 1.4 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Iet Science Measurement & Technology Pub Date : 2022-01-31 DOI:10.1049/smt2.12098

Mohammad Makhdoumi Akram, Mohammad Ramezannezhad, Alireza Nikfarjam, Shima Kabiri, Sana Ehyaei

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Abstract

In this study, a portable Total Dissolved Solids (TDS) and Electrical Conductivity (EC) of water sensor using a disposable polymer strip and the readout circuit segments is presented. The strip consists of gold electrodes and a vent hole for water flow injection inside the measurement chamber. This strip reduces the cost of the measurement, decreases the measurement duration, and increases the repeatability of the system. Besides, there is no demand for electrodes cleaning and recalibration of the system. According to the electrical model of strip electrodes and their frequency responses, the EC value is in the range of 78.1–1230.8 (µs)/cm. The experimental tests are carried out based on the frequency method in the concentration range within 50–800 ppm. The results confirm the linear relation of TDS concentration on the EC voltage value which is 1.9 mV for 1 ppm resolution. Also, the effect of temperature variations on the EC value is investigated. Furthermore, the average amount of error for EC measurement exhibits an acceptable amount in comparison with other studies. Moreover, studying the drift variations for 20 days reveals the maximum drift of 1.6%. Finally, according to the present study, the sensor is a suitable candidate for practical applications.

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一种用于水质分析的条带式总溶解固体传感器

在这项研究中，提出了一种便携式总溶解固体(TDS)和电导率(EC)的水传感器，该传感器使用一次性聚合物条和读出电路段。该条由金电极和测量室内用于水流注入的排气孔组成。该条带降低了测量成本，减少了测量持续时间，并增加了系统的可重复性。此外，不需要电极清洗和系统的重新校准。根据条带电极的电学模型和频率响应，EC值在78.1-1230.8(µs)/cm范围内。在50 - 800ppm的浓度范围内，采用频率法进行了实验测试。结果证实了TDS浓度与EC电压值(在1ppm分辨率下为1.9 mV)呈线性关系。同时，研究了温度变化对EC值的影响。此外，与其他研究相比，EC测量的平均误差量显示出可接受的量。此外，对20 d漂移变化的研究表明，最大漂移为1.6%。最后，根据目前的研究，该传感器是一个适合实际应用的候选。

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来源期刊

Iet Science Measurement & Technology 工程技术-工程：电子与电气

CiteScore

4.30

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： IET Science, Measurement & Technology publishes papers in science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.The emphasis of the journal is on theory, simulation methodologies and measurement techniques. The major themes of the journal are: - electromagnetism including electromagnetic theory, computational electromagnetics and EMC - properties and applications of dielectric, magnetic, magneto-optic, piezoelectric materials down to the nanometre scale - measurement and instrumentation including sensors, actuators, medical instrumentation, fundamentals of measurement including measurement standards, uncertainty, dissemination and calibration Applications are welcome for illustrative purposes but the novelty and originality should focus on the proposed new methods.