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Pressure Gauges

Pressure Gauges

Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...

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Related Experiment Video

Updated: Nov 6, 2025

Author Spotlight: Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing

Author Spotlight: Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing

Published on: March 17, 2023

Multilayer Double-Sided Microstructured Flexible Iontronic Pressure Sensor with a Record-wide Linear Working Range.

Yan Xiao¹, Yu Duan¹, Ning Li¹

¹Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

|May 6, 2021

Summary

This study introduces a flexible capacitive pressure sensor with an exceptionally wide linear working range and high sensitivity. This breakthrough addresses key challenges in wearable electronics and human-machine interfaces.

Keywords:

flexible pressure sensor high sensitivity iontronic sensor multilayer double-sided microstructures ultrabroad linear working range

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Last Updated: Nov 6, 2025

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Published on: March 17, 2023

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Published on: March 24, 2023

Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors

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Published on: June 23, 2018

Area of Science:

Materials Science
Electrical Engineering
Biomedical Engineering

Background:

Flexible sensors are crucial for wearable electronics, electronic skins, and human-machine interfaces.
Achieving both high sensitivity and a wide linear working range in these sensors remains a significant challenge.
Existing sensors often compromise one aspect for the other, limiting their application scope.

Purpose of the Study:

To develop a flexible capacitive pressure sensor with an ultrabroad linear working range and high sensitivity.
To overcome the limitations of current pressure sensors in terms of dynamic measurement capabilities.
To enable new advancements in fields requiring precise and versatile pressure sensing.

Main Methods:

Fabrication of a flexible capacitive pressure sensor utilizing a dielectric layer composed of multilayered, double-sided microstructured ionic gel films.
Engineering the multilayered structure with inter-film gaps to enhance compressibility and ensure even stress distribution.
Incorporating densely distributed protrusive microstructures within the electric double layer to boost sensitivity.

Main Results:

Demonstrated an ultrabroad linear working range from 0.013 to 2063 kPa, spanning six orders of magnitude.
Achieved a high sensitivity of 9.17 kPa^-1 across the entire linear working range.
Confirmed consistent and stable sensor performance from low to high measurement ranges.

Conclusions:

The developed flexible capacitive pressure sensor offers unprecedented performance in terms of sensitivity and linear working range.
This sensor technology can be applied across diverse applications without requiring recalibration for different loading scenarios.
Represents a significant advancement for flexible electronics, electronic skins, and human-machine interfaces.