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Control fruit ripening - with NDIR sensors from smartGAS
In order to ensure that the fruit comes out of the transportation and storage periods in good condition, they are preserved in a protective atmosphere. The degree of ripeness and growth can be selectively influenced by means of a defined temperature and through controlled concentrations of CO2, O2 and C2H4. Our CO2- and C2H4 sensors come in when monitoring the correct concentrations.
The role of ethylene in the ripening process
Ethylene is a plant hormone and plays an important role in the ripening process of various fruits, such as apples, bananas and tomatoes. People have being making use of this effect since ancient times by putting together ripe and unripe fruits. The ripe fruits give off ethylene and thereby in turn stimulate the ripening process of the still unripe fruits.
Bananas, which are predominantly from South America and Asia, are harvested while still green, packed and transported on refrigerated vessels in order to interrupt the ripening process. After unloading, the bananas ripen in so-called banana ripening plants. There they are fumigated with ethylene at a concentration between 100 and 1000 ppm. Ethylene sensors ensure the planned fruit ripening through the continual monitoring and controlling of the C2H4 content in the store atmosphere.