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Related Experiment Video

Updated: Jan 26, 2026

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique

Published on: March 24, 2023

Embedded, Fully Spray-Coated Pressure Sensor Using a Capacitive Transducing Mechanism.

Christina Offenzeller¹, Marcel Knoll², Bernhard Jakoby³

¹Institute for Microelectronics and Microsensors, Johannes Kepler University Linz, 4040 Linz, Austria. christina.offenzeller@jku.at.

|April 10, 2019

Summary

This summary is machine-generated.

This study developed a spray-coated pressure sensor for real-time monitoring in harsh environments. The capacitive sensor demonstrates sensitivity and stability, even at high temperatures.

Keywords:

additive manufacturing capacitive embedded high pressure high temperature metal/organic polymer composite pressure sensor spray-coated

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Area of Science:

Materials Science
Mechanical Engineering
Sensor Technology

Background:

Real-time monitoring of mechanical systems in demanding environments requires integrated sensors.
Existing sensors may not withstand high pressures or harsh conditions.

Purpose of the Study:

To develop a fully-spray coated pressure sensor for high-pressure applications.
To embed functional sensor layers within organic coatings for capacitive sensing.
To evaluate sensor performance, including sensitivity, stability, and temperature effects.

Main Methods:

Fabrication of a fully-spray coated capacitive pressure sensor.
Integration of the sensor within functionalized organic coatings acting as a dielectric.
Testing of sensor sensitivity, long-time stability, and performance at elevated temperatures.

Main Results:

The spray-coated sensor operates effectively in the high-pressure range.
The sensor exhibits measurable sensitivity and long-time stability.
Temperature-dependent sensitivity was observed due to changes in material properties (Young's moduli).

Conclusions:

Spray coating offers a viable method for embedding functional pressure sensors into mechanical systems.
The developed sensor is suitable for real-time monitoring in high-pressure, heavy-duty applications.
Understanding temperature-dependent performance is crucial for accurate monitoring in varying thermal conditions.