Effect of Organic Vapour on Porous Alumina Based Moisture Sensor in Dry Gases

Sensors & Transducers

Debdulal SAHA¹  Kamalendu SENGUPTA¹  S. S. ISLAM²  Tarikul ISLAM²  Saakshi DHANEKAR² 

[1] Central Glass and Ceramic Research Institute, Jadavpur, Kolkata-700032, West Bengal, India;Nano-Sensor Research Laboratory, Jamia Millia Islamia (Central University), New Delhi -110025, India;

关键词: Sol-gel technique;    Porous alumina;    Traces moisture sensor;    Cross-sensitivity;    Response time;    Recovery time;   

DOI  :  

来源: DOAJ

【 摘 要 】

A capacitive porous alumina based trace moisture sensor in the range of 50 to 500 ppm (V) was fabricated by low cost sol-gel technique. The cross-sensitivities due to the presence of organic vapours like ethanol, methanol, acetone and benzene were studied. The change in response and recovery time with ppm for moisture sensing was also calculated. The experimental results conclude that moisture sensor is responsive to the polar organic vapours but has almost negligible response to the nonpolar molecules like benzene. Response of the sensor to the organic vapours as compared to the moisture sensitivity is very less. The effect of ambient temperature was found to be negligible.

【 授权许可】

Unknown