MOCON, Inc., Minneapolis, helps to improve the accuracy of package headspace oxygen readings with what is said to be the first-of-its-kind instrumentation technology.

The new OpTech-O2 Model P test system uses a patent-pending Pressure Needle and sensor to automatically measure internal package pressure and calculate correct oxygen readings.

The ability of the instrument to automatically compensate for the internal pressure when measuring headspace gas is particularly important for small packages, such as blister packs. This is because a variety of actions, such as the force required to insert the needle, can impact the internal pressure. The capability also benefits any package size with unknown internal conditions. 

The sensor is located at the tip and is inserted directly into the headspace, eliminating the need to extract headspace to conduct the test. The sensors are non-consuming, enabling long-term, shelf-life studies by measuring the changes within the same package headspace.

MOCON’s OpTech-O2 technology relies on an optical sensor that “fluoresces” or gives off light directly related to the amount of oxygen present in the package headspace. In addition, the OpTech-O2 Model P is a useful tool for measuring oxygen permeation rates down to 1cc/(m2?day).