Resistive gas sensors are very popular and relatively inexpensive; they can operate at elevated or room temperature for years on end. The main disadvantage of resistive gas sensors is their limited selectivity and sensitivity, but various methods have been applied to improve their behavior. The composition of the porous gas sensing layer, or changes in the sensor’s operating temperature, can enhance the gas detection ability. Furthermore, emerging technologies can increase the area of the active surface and advance the sensors’ sensitivity as well. Another improvement can be reached by employing low-frequency resistance fluctuations rather than DC resistance alone. That technique, called fluctuation enhanced sensing (FES), was developed about two decades ago and has been investigated with regard to different gas sensing layers. The present paper gives an overview over various experimental results and confirms improved gas detection and elucidates practical aspects connected with the FES method.
Authors
- prof. dr hab. inż. Janusz Smulko link open in new tab ,
- dr inż. Maciej Trawka,
- Umut Cindemir,
- Claes Goran Granqvist,
- Cristhian Duran
Additional information
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2016
