Low cost wireless passive microsensors for the detection of hazardous compounds in water systems for control and monitoring

Sanz, D.; Unigarro, Edgar A.; Osma, Johann F.; Segura-Quijano, Fredy

doi:10.1016/j.snb.2012.12.027

Cited by 20 publications

(13 citation statements)

References 17 publications

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“…Further research work can be done by design an integrated platform [44]. A first approach could be a TOC analyzer similar to the one described by Su et al [45]. This analyzer is based on a Bulk Acoustic Wave (BAW) impedance sensor, where the Total Inorganic Carbon (TIC) value is directly measured and TOC value is obtained by oxidation of the sample.…”

Section: Device Descriptionmentioning

confidence: 99%

Feasibility Study of a Simple and Low-Cost Device for Monitoring Trihalomethanes Presence in Water Supply Systems Based on Statistical Models

Rivadeneyra

García-Ruiz

Delgado-Ramos

et al. 2014

Water

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This paper describes a new method for predicting trihalomethanes (THMs) presence in networks of water supply systems, using a low-cost device that permits a fast monitoring of concentrations without need of complex analysis made in laboratories. This method, based on statistical models, allows the estimation of THM concentration by monitoring parameters whose determination is direct and easy, and therefore, THM presence can be carried out in real-time. These parameters values are introduced in a multiple regression model resulting in the concentration of THMs levels. This model has taken into account parameters compulsory in water quality analysis and it has been shown that six parameters are enough to determine accurately THM concentration. In addition, the feasibility of a low-cost device that directly gives THM concentration is demonstrated. This device can be easily designed to be transported to different points of the water supply network where it is intended to make control campaigns.

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Section: Device Descriptionmentioning

confidence: 99%

Feasibility Study of a Simple and Low-Cost Device for Monitoring Trihalomethanes Presence in Water Supply Systems Based on Statistical Models

Rivadeneyra

García-Ruiz

Delgado-Ramos

et al. 2014

Water

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“…To that end, we considered the usage of an inter-digital capacitance (IDC), which has been previously tested to detect water contaminants [2], [3], [4]. An IDC sensor generates an electric field between its electrodes that interacts with the material under test (MUT) and, depending on the composition of the MUT (more specifically, its permittivity), the capacitance of the sensor varies [5].…”

Section: Introductionmentioning

confidence: 99%

IDC Sensor for Low-Cost Water Quality Monitoring Applications

Méndez

Pérez

Farfán

et al. 2021

IyU

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In order to properly monitor the health status of the hydrological resources of a region, in terms of water contamination, a scalable and low-cost system is necessary to map the water quality at different locations and allow the prioritization of more sophisticated and expensive monitoring campaigns on those areas where a suspicious behavior seems to be occurring. This paper presents the design and implementation process of such an IoT-based solution for low-cost and scalable water quality monitoring applications. To achieve that end, we propose the utilization of a low-cost inter-digital capacitance (IDC) sensor to characterize the conductivity of the water, a very telling parameter about the level of pollution in the water. Additionally, an embedded method to measure such sensor was designed and implemented, which considers the requirements of a portable platform: low computational capabilities, small memory and low power consumption. Our results show that an IDC sensor is capable of detecting the changes of the capacitance of the sample, and therefore mapping the changes in the conductivity of the water. Additionally, integrating an embedded measuring method is a valid option for in-situ characterization of water samples and the complete solution enables a new paradigm for water quality monitoring in large scale scenarios.

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“…Disturbance in an intensified electric field intensity can be achieved by reducing the resonating frequency and attaining a high penetration depth [ 35 , 36 , 37 ]. Additionally, the enhanced filling factor (i.e., the volume fraction of deposited dielectric sample on the sensing area) can be achieved by a fabricated structure using micro-fabrication techniques [ 38 , 39 ]. Moreover, human blood plasma constitutes 92% of water by the volume fraction [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity, Quantified, Linear and Mediator-Free Resonator-Based Microwave Biosensor for Glucose Detection

Kumar

Wang

Meng

et al. 2020

Sensors

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This article presents a high-sensitivity, quantified, linear, and mediator-free resonator-based microwave biosensor for glucose sensing application. The proposed biosensor comprises an air-bridge-type asymmetrical differential inductor (L) and a center-loaded circular finger-based inter-digital capacitor (C) fabricated on Gallium Arsenide (GaAs) substrate using advanced micro-fabrication technology. The intertwined asymmetrical differential inductor is used to achieve a high inductance value with a suitable Q-factor, and the centralized inter-digital capacitor is introduced to generate an intensified electric field. The designed microwave sensor is optimized to operate at a low resonating frequency that increases the electric field penetration depth and interaction area in the glucose sample. The microwave biosensor is tested with different glucose concentrations (0.3–5 mg/ml), under different ambient temperatures (10–50 °C). The involvement of advanced micro-fabrication technology effectively miniaturized the microwave biosensor (0.006λ0 × 0.005λ0) and enhanced its filling factor. The proposed microwave biosensor demonstrates a high sensitivity of 117.5 MHz/mgmL-1 with a linear response (r2 = 0.9987), good amplitude variation of 0.49 dB/mgmL-1 with a linear response (r2 = 0.9954), and maximum reproducibility of 0.78% at 2 mg/mL. Additionally, mathematical modelling was performed to estimate the dielectric value of the frequency-dependent glucose sample. The measured and analyzed results indicate that the proposed biosensor is suitable for real-time blood glucose detection measurements.

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Low cost wireless passive microsensors for the detection of hazardous compounds in water systems for control and monitoring

Cited by 20 publications

References 17 publications

Feasibility Study of a Simple and Low-Cost Device for Monitoring Trihalomethanes Presence in Water Supply Systems Based on Statistical Models

Feasibility Study of a Simple and Low-Cost Device for Monitoring Trihalomethanes Presence in Water Supply Systems Based on Statistical Models

IDC Sensor for Low-Cost Water Quality Monitoring Applications

High-Sensitivity, Quantified, Linear and Mediator-Free Resonator-Based Microwave Biosensor for Glucose Detection

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