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Black tea is one of Indonesia's major leading export products. In terms of trading, quality of black tea, especially flavor and aroma, will determine its selling price. The purpose of this research is to design a prototype of electronic nose, which integrated gas sensors, data acquisition, and computer, to detect the aroma of brewed black tea. This electronic nose consists of four gas sensors (TGS...
The monitoring of concentration of methane dissolved in water is important for the security of underwater pipelines, delineation of oil and gas fields, and optimization of proper location of oil and gas wells. The reported system consists of metal oxide gas sensor separated from water by hydrophobic pervaporation membrane. Methane MEMS sensor was based on multilayer SiO2/Si3N4 film equipped with platinum...
Gas chromatography for biogas concentration measurement is too expensive for people who made biogas independently. An instrument with cheaper TGS2611 sensor can be made to monitor biogas concentration. The instrument requires initialization for 60 seconds. TGS2611 sensor output voltage has proportionally changed to the temperature change. Two gas sensors used in the research have 12.125 mV/°C and...
Electronic nose (e-nose) is a device that plays an important role for odor assessment due to its low cost and wide-range applications. Currently, e-nose is widely used in the food industry such as coffee, wines, beers etc. Coffee is one of the most popular beverages in the human history. There are various types of products, for examples, roast/round, instant/soluble and ready-to-drink coffees etc...
In this paper, a new on-line drift reduction method based on component correction method is proposed for using in a portable electronic nose (Enose) instrument which is used for real-time monitoring indoor formaldehyde. For a portable Enose instrument which is used indoors, the external conditions are changed from time to time, so the drift direction cannot be easily obtained by using component correction...
The current situation shows that the homemade chlorine gas online detect instrument is low in precision and simple in functions, the import instrument is too expansive and only has the short communication distance with the control center. A chlorine gas online detect instrument was developed. Adopting MSP430 processor and constant electrolytic gas sensor, it can measure the concentration of chlorine...
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