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    • Keywords


      Humidity sensors; 2D materials; composites; polymers; commercial sensors; carbon and derivatives.

    • Abstract


      Measurement of relative humidity demands sensors with different requirements and specifications. There hasbeen a lot of work done on the development of humidity sensors with more than 100,000 research articles already published. The huge research magnitude suggests huge potential in this field but the question arises as to why such aseemingly simple task requires so much research efforts? Which parameters are exactly targeted? What are the difficulties faced? And, what are the different approaches adopted to achieve the requirements? The research on humidity sensors usually targets improvement of various performance parameters while keeping the cost low and the fabrication processeasy. As many parameters are interdependent, the criteria to prioritize some parameters over others based on the target application are also considered. A major portion of research work in this field is based on the development of novel materials to achieve these targets, which are set according to desired applications. This focus review discusses the most widely employed and the best performing material categories including polymers, composites, 2D materials and carbon based materials for the development of humidity sensors. The material properties, selection process, sensing mechanism,and the pros and cons of various categories for different target applications are discussed. A comprehensive overview of commercial humidity sensors is also presented. The aim of this review is to provide clear guidelines for researchers working in this field, so as to provide a new path which needs to be adopted and to discourage redundant research related to humidity sensors development.

    • Author Affiliations



      1. Faculty of Electrical Engineering, GIK Institute, Topi 23640, Pakistan
      2. Faculty of Mechanical Engineering, GIK Institute, Topi 23640, Pakistan
      3. CAEPE, International Islamic University, Islamabad 44100, Pakistan
      4. AMM Lab, Mechatronics Engineering, Jeju National University, Jeju 690-011, Korea
    • Dates

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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