Gas sensors have become vital components in recent years, with applications ranging from environmental monitoring to industrial safety and healthcare due to their ability to detect and quantify gases. This paper presents various types of gas sensors, including chemiresistive, non-dispersive infrared (NDIR), electrochemical, optical, thermal, catalytic, and surface acoustic wave-based sensors, highlighting their working principles, benefits, and limitations. A bibliometric analysis of research trends from 2013 to 2023 is conducted using data from the Scopus database, a leading source of peer-reviewed literature across scientific disciplines. The analysis explores trends in publications, author contributions, institutional affiliations, geographic distribution, subject areas, and funding sources. Additionally, recent advancements and challenges in gas sensor technologies are discussed, offering insights into innovations that may shape the future of gas sensing. This work serves as a valuable reference for researchers and industry professionals aiming to understand the current developments and future opportunities in gas sensor technology.