For such purposes, we developed an ultrasmall gas sensor device, where a micro sensing film was deposited on a micro heater integrated with electrodes fabricated by the microelectromechanical system ...

Abstract: This paper demonstrates a new kind of hydrogen sensor using palladium (Pd) nanowires. Hydrogen sensors using Pd metal have usually been utilizing the incremental change in electrical ...

Based on your application, you can use any sensor as you want in place of the DHT11 sensor. For example, if you want to trigger an SMS alert when motion is detected, then you might opt for a PIR ...