A major cause of food spoilage is oxygen. As such, Modified Atmosphere Packaging (MAP), which tightly controls the amount of oxygen present in a package, is becoming an ever increasingly popular method for packaging fresh foods. A major drawback of MAP is the lack of a low cost and easy to implement oxygen sensor that monitors the integrity of the package and indicates any presence of oxygen in the package that is outside of the allowed amount.

Currently, manufacturers wishing to test that product exiting the production line indeed contain the correct percentage of oxygen need to sample products at a pre-defined rate, in a destructive manner. This results in both wasted products and downtime of the production line when discrepancies are found. O2Sense offers manufacturers an online, nondestructive method of optically testing each and every package exiting the production line by means of a low cost indicator attached to each product combined with a simple, easy to integrate optical reader placed on the line.