Full carbon-based humidity sensor by handwriting electrodes and the sensitive materials on paper substrates. (© ACS) (click on image to enlarge) The researchers used a commercial pencil to fabricate ...

This approach eliminates costly metals, toxic chemicals and specialised fabrication infrastructure — opening the door to ...

Gauhati University researchers have created a flexible, low-cost sensor using pencil, paper and graphene, marking a step ...

Everyday materials found in the kitchen, such as aluminum foil, sticky note paper, sponges and tape, have been used by a team of electrical engineers to develop a low-cost sensor that can detect ...

Relative humidity, or RH, is the percentage of moisture in the air referenced to the maximum level of moisture the air can hold at that temperature and pressure. Early humidity sensors used natural ...