A novel high-sensitivity, low-power, liquid crystal temperature sensor

Citations of this article
Mendeley users who have this article in their library.


A novel temperature sensor based on nematic liquid crystal permittivity as a sensing magnitude, is presented. This sensor consists of a specific micrometric structure that gives considerable advantages from other previous related liquid crystal (LC) sensors. The analytical study reveals that permittivity change with temperature is introduced in a hyperbolic cosine function, increasing the sensitivity term considerably. The experimental data has been obtained for ranges from -6 °C to 100 °C. Despite this, following the LC datasheet, theoretical ranges from -40 °C to 109 °C could be achieved. These results have revealed maximum sensitivities of 33 mVrms/°C for certain temperature ranges; three times more than of most silicon temperature sensors. As it was predicted by the analytical study, the micrometric size of the proposed structure produces a high output voltage. Moreover the voltage's sensitivity to temperature response can be controlled by the applied voltage. This response allows temperature measurements to be carried out without any amplification or conditioning circuitry, with very low power consumption. © 2014 by the authors; licensee MDPI, Basel, Switzerland.




Algorri, J. F., Urruchi, V., Bennis, N., & Sánchez-Pena, J. M. (2014). A novel high-sensitivity, low-power, liquid crystal temperature sensor. Sensors (Switzerland), 14(4), 6571–6583. https://doi.org/10.3390/s140406571

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free