Remote query measurement of pressure, fluid-flow velocity, and humidity using magnetoelastic thick-film sensors

Grimes, Craig A.; Kouzoudis, Dimitris

doi:10.1016/s0924-4247(00)00306-x

Cited by 100 publications

(61 citation statements)

References 12 publications

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“…The importance of humidity sensing has been well understood and many researchers have been focussed on the development of humidity sensitive materials [12][13][14][15][16]. Most humidity detection studies have investigated on the use of polymer [17][18][19][20][21][22] and ceramic materials due to their low cost and excellent performance [23][24][25][26][27]. The aim of the present study has been to seek a material that possesses good sensitivity over the entire range of humidity and should be stable over time.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Rama¹,

Yadav²,

Chandkiram³

2011

JST

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In this paper zinc stannate (ZnSnO 3 ) nanoparticles was synthesized by a chemical precipitation method. The synthesized samples were characterized using X-ray powder diffraction (XRD), Differential scanning calorimetry (DSC) and UV-Visible absorption spectroscopy. Sensing material was made as pellet by hydraulic press machine under uniform pressure of 616 MPa. Then the material was annealed at 600˚C. Surface morphologies of the samples were analyzed using Scanning electron microscopy (SEM) for pellet of different weight ratio annealed at 600˚C. The XRD pattern indicates that ZnSnO 3 has a perovskite phase with an orthorhombic structure having minimum crystallite size 4 nm. Further, humidity sensing investigations of these sensing materials were done. Our result indicate that ZnSnO 3 in form of pellet annealed at 600˚C for 1:4 weight ratio was most sensitive of humidity in comparison to pure SnO 2 under same conditions. Maximum sensitivity of the sample was 3 GΩ/% RH which is better in comparison to pure SnO 2 . The results were reproducible up to ± 77% after 2 months of observations.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Rama¹,

Yadav²,

Chandkiram³

2011

JST

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“…Magnetoelastic sensors have attracted considerable interest within the sensor community as they form an excellent sensor platform that can be used to measure a wide range of environmental parameters including pressure [1][2][3], humidity [3][4][5], temperature [5][6], liquid viscosity and density [7][8][9][10], thin-film elasticity [11], and chemicals such as carbon dioxide [12][13], ammonia [14], and pH [15]. Magnetoelastic sensors are typically made of amorphous ferromagnetic ribbons or wires, mostly iron-rich alloys such as Fe 40 Ni 38 Mo 4 B 18 (Metglas brand 2826MB) and Fe 81 B 13.5 Si 3.5 C 2 (Metglas 2605SC) ribbons [15] that have a high mechanical tensile strength (~1000-1700 MPa), and a low material cost allowing them to be used on a disposable basis.…”

Section: Introductionmentioning

confidence: 99%

Wireless Magnetoelastic Resonance Sensors: A Critical Review

Grimes

Mungle

Zeng

et al. 2002

Sensors

196

159

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This paper presents a comprehensive review of magnetoelastic environmental sensor technology; topics include operating physics, sensor design, and illustrative applications. Magnetoelastic sensors are made of amorphous metallic glass ribbons or wires, with a characteristic resonant frequency inversely proportional to length. The remotely detected resonant frequency of a magnetoelastic sensor shifts in response to different physical parameters including stress, pressure, temperature, flow velocity, liquid viscosity, magnetic field, and mass loading. Coating the magnetoelastic sensor with a mass changing, chemically responsive layer enables realization of chemical sensors. Magnetoelastic sensors can be remotely interrogated by magnetic, acoustic, or optical means. The sensors can be characterized in the time domain, where the resonant frequency is determined through analysis of the sensor transient response, or in the frequency domain where the resonant frequency is determined from the frequency-amplitude spectrum of the sensor.

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“…The magnetoelastic sensor thus has the unique characteristics of being able to wirelessly detect resonant frequency changes of the magnetoelastic strip based on the physical dimensions of the magnetoelastic strip, the compositions attached on the strip and the environment around the strip. These kind of biosensor have been developed for the determination of physical parameters, such as pressure, humidity, flow rate, 19 liquid viscosity, pH, 20,21 and for the detection of biological substances including glucose, 22 bacteria, [23][24][25][26] protein, 27 blood coagulation, 28 antigen immunoassay 29 and breast cancer cell. 30 However, no report has been found for the real-time and in situ monitoring of 2-NAP by magnetoelastic sensors.…”

Section: Introductionmentioning

confidence: 99%

A Wireless Magnetoelastic Sensor for Urinary 2-Naphthol Detection Based on the Precipitation of 2-Naphthol with Diazonium Salts

et al. 2011

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A wireless magnetoelastic sensor has been developed for the determination of 2-naphthol (2-NAP) in human urine. This method is based on the precipitation of 2-NAP with diazonium salts produced by the diazo-reaction of sulfamethoxazole (SMZ) with nitrite under a weak alkaline condition, resulting in a descending of the resonance frequency of a wireless magnetoelastic sensor. The frequence shift values (ΔF) of the sensor were directly proportional to the concentration in the range of 1.13 -139 μmol L -1 for 2-NAP with a correlation coefficient of 0.997 and a detection limit of 0.340 μmol L -1 . The relative standard deviations were 2.38, 2.40 and 2.44%, and the average recovery was 107% (n = 6). The proposed method has additional advantages of being less time-consuming, low cost and remote query, and can be applied for realtime and in situ monitoring of 2-NAP in human urine. It would be a benefit to extend the scope of applications of magnetoelastic sensing techniques.

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Remote query measurement of pressure, fluid-flow velocity, and humidity using magnetoelastic thick-film sensors

Cited by 100 publications

References 12 publications

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Wireless Magnetoelastic Resonance Sensors: A Critical Review

A Wireless Magnetoelastic Sensor for Urinary 2-Naphthol Detection Based on the Precipitation of 2-Naphthol with Diazonium Salts

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Remote query measurement of pressure, fluid-flow velocity, and humidity using magnetoelastic thick-film sensors

Cited by 100 publications

References 12 publications

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO&lt;sub&gt;3&lt;/sub&gt;

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO&lt;sub&gt;3&lt;/sub&gt;

Wireless Magnetoelastic Resonance Sensors: A Critical Review

A Wireless Magnetoelastic Sensor for Urinary 2-Naphthol Detection Based on the Precipitation of 2-Naphthol with Diazonium Salts

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Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>