AN INTRODUCTION TO THICK FILM GAS SENSOR FABRICATION this book covers the all the fundamental aspects related to gas sensor fabrication. The book encourage scholars to continue the research in the corresponding field or related areas. Concepts are explained with illustrations, diagram, and explanations with figures. Artificial Neural network concepts used to experimental evaluation on the thick film gas sensors were also discussed. AI based approaches and their importance in studying and evaluation of these thick film gas sensors were discussed in detail.