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首页> 外文会议>2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems amp; Eurosensors XXXIII >Temperature Sensor Using Two Thermoelectric Liquid Electrolytes in Microfluidic Channels
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Temperature Sensor Using Two Thermoelectric Liquid Electrolytes in Microfluidic Channels

机译：在微流体通道中使用两种热电液体电解质的温度传感器

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摘要

A temperature sensor using two thermoelectric liquid electrolytes in microfluidic channels is proposed, and fabricated, and evaluated. Two different electrolytes, which Seebeck coefficients are positive and negative, are electrically connected via a metal electrode. The electrode was deposited on the backside of a heat stage, which means the electrical contact area of the two electrolytes are heated as the stage is heated. The sum of the thermoelectric voltage from the two electrolytes is observed changing the temperature of the heat stage. The sensitivity of the conventional metal thermocouples depends on the Seebeck coefficients of the composed materials; however, the absolute values of the solid materials are not so large (less than few-hundreds V/K or so). Some liquid electrolytes show the relatively large absolute value of the Seebeck coefficient; however, the liquid cannot keep their interface at the contact area because of the mixing and diffusing. A temperature sensor based on a liquid thermocouple is proposed, and the proto-type is fabricated. Moreover, the performances of the thermoelectric voltage response and temperature resolution are evaluated. As a result, the thermoelectric voltage of 10.6 mV/K and the resolution of 12.8 mK are obtained. The thermoelectric voltage is reasonable considering the Seebeck coefficient of the used electrolytes.
机译：提出了一种在微流体通道中使用两种热电液体电解质的温度传感器，并进行了制造和评估。塞贝克系数为正和负的两种不同的电解质通过金属电极电连接。电极沉积在加热台的背面，这意味着在加热台时会加热两种电解质的电接触面积。观察到来自两种电解质的热电压之和改变了加热台的温度。常规金属热电偶的灵敏度取决于所用材料的塞贝克系数。但是，固体材料的绝对值不是很大（小于几百个V / K左右）。一些液体电解质的塞贝克系数的绝对值较大。然而，由于混合和扩散，液体不能使它们的界面保持在接触区域。提出了一种基于液体热电偶的温度传感器，并制作了原型。此外，评估了热电电压响应和温度分辨率的性能。结果，获得了10.6mV / K的热电电压和12.8mK的分辨率。考虑到所用电解质的塞贝克系数，热电压是合理的。

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