Lecture
This lecture covers the fundamental concepts of gas sensors, including the definition of chemical sensors, transducer mechanisms, tasks of chemical sensors, interaction mechanisms in chemical sensing processes, and the different categories of gas sensors. It also discusses the requirements for chemical sensors, such as sensitivity, selectivity, stability, speed, and simplicity. The lecture delves into the signal response curve as a function of concentration, the importance of selectivity in chemical sensors, and the speed requirements for sensor response. Additionally, it explores various types of gas sensors based on sensing materials, transduction principles, and their applications in different environments.