| 摘要 |
<p>The invention relates to a sensor device for detecting CO2 wherein the said device has (a) a support base, (b) an acid-base indicator composition that stably changes colour upon exposure to CO2; and (c) a viewer cover, and wherein least (a) and (c) is CO2 permeable and wherein (b) includes at least one acid-base indicator that has a pKln of or above 9.5 and (b) is disposed between (a) and (c) such that the colour change of (b) can be observed through (c). The sensor device of the present invention may be utilized to monitor the ripening process of fresh produces such as fruits, the fermentation or spoilage of food, and/or activity of micro-organisms such as soil and root nodule bacteria in soil.</p> |
