Polymer composites for humidity sensors

Humidity assessment is an important concern in a variety of applications, including instrumentation, automation processes, agricultural production, climate science, and geographic information systems (GIS). This chapter examines a number of humidity sensors that have been manufactured and established for lab-based and industrial applications. RH sensors are frequently studied in terms of their inorganic and organic functional substances, including polymers, highly permeable ceramics, and electrolytes, along with conduction processes and fabrication techniques. Furthermore, the working principle, sensing substances, different production processes, transduction technologies, and efficiency of various humidity sensors are explained in detail. Future prospects of humidity sensors are examined, along with certain limitations, such as sensing component efficiency and conduction values, that must be overcome.