Humidity Sensor: An Overview

ABSTRACT

The present review provides a detailed introduction, properties, types, applications, uses, and requirements of a humidity sensor. Humidity affects mankind directly or indirectly. Therefore, there is an urgent need to precisely measure and control humidity in various environments. The role and various methods for measurement of humidity are included. The detailed working principle of a resistive type humidity sensor based on metal oxides is also explained.

KEYWORDS:

• humidity sensor
• hygrometer
• metal oxide
• water vapor
• adsorption

Acknowledgments

Richa Srivastava is highly grateful to the University Grants Commission of Delhi for the “Post-Doctoral Fellowship for Women” No.F.15-79/11 (SA-II).