Articles | Volume 9, issue 1
J. Sens. Sens. Syst., 9, 1–6, 2020
https://doi.org/10.5194/jsss-9-1-2020

Special issue: Sensors and Measurement Systems 2019

J. Sens. Sens. Syst., 9, 1–6, 2020
https://doi.org/10.5194/jsss-9-1-2020
Review paper
06 Jan 2020
Review paper | 06 Jan 2020

Modelling and model verification of an autonomous threshold sensor for humidity measurements

Nikolai Gulnizkij and Gerald Gerlach

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Latest update: 20 Sep 2022
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Short summary
We describe a mechanical model based on the beam theory for the development of a beam-like sensor switch with switching hysteresis for humidity sensing. The hydrogel swelling provides the mechanical energy to deflect the partly hydrogel-covered bending beam via the bimorph effect. From the model, we calculate the deflection of a beam-like sensor switch with and without a switching hysteresis. A beam-like sensor switch was manufactured, and the switching hysteresis was successfully demonstrated.