Abstract The water vapour permeability is a material property used in calculations of the hygrothermal performance buildings. standard test method (the ‘cup test’), little changed for decades and based on measuring weight changes, has been shown repeatedly round-robin comparisons to have poor accuracy consistency between laboratories. Here we describe new approach which primary measurement humi...

The humidity sensor is an important device used in many areas of human life, such as agriculture, medicine, industry, meteorology and more. Most often, synthetic polymers are for the manufacture sensors, which after end their operation accumulated form electronic waste, polluting environment. Currently, biodegradable great demand. Such materials include nanocellulose, can be made from both wood...

The development of micro-/nano-scaled energy harvesters and the self-powered sensor system has attracted great attention due to the miniaturization and integration of the micro-device. In this work, lead-free NaNbO₃ piezoelectric nanofibers with a monoclinic perovskite structure were synthesized by the far-field electrospinning method. The flexible active humidity sensors were fabricated by tra...

A new volatile organic compounds (VOCs) sensing concept called humidity-initiated gas (HIG) sensors is described and demonstrated. HIG employ the impedance of water assembled at sensor interfaces when exposed to humidity sense VOCs low concentrations. Here, two variants are studied—Type I Type II. benefit from simplicity, but less attractive in terms key performance metrics, including response ...