Oxygen Sensor Applications
All of our oxygen sensor formulations perform over the full 0 -100% range of oxygen concentration, but some have better resolution than others in a specific range. FOSPOR maintains very consistent resolution from 0 – 100%, while HIOXY offers best resolution below ~30%. The HIOXY formulation has the best response time of all our formulations, while the stability of our FOSPOR formulation lends itself well to the widest range of applications. Read on to learn more about the best formulations for your application.
From humans to birds, sea sponges to trees, respiration is a process of utmost importance in biological systems across many varied fields. Our HIOXY formulation without the silicone overcoat gives response times of a second or less with averaging set to a minimum, and the small size and flexibility of our AL300 probe makes it an ideal choice for fast and accurate monitoring of respiration.
As ocean chemistry across the planet continues to change, dissolved gas content is a key parameter for marine scientists to observe. Our FOSPOR formulation is extremely stable for long-term monitoring applications, and is offered with a USP Class VI certified silicone overcoat that protects the sensor from marine biofouling and chemical degradation from salt exposures.
Perhaps the most common application for our oxygen sensors isn’t a specific application at all, but rather broad use across research fields as a small easy-to-use benchtop oxygen sensor for the lab. The NeoFox electronics take up minimal table space and the sensor probes and patches have no special storage requirements. All of our oxygen sensor chemistries have their particular strengths for one application over another, and are offered as non-invasive patches and probes at standard diameters (1/16”, 1/8”, 1/4″) that can be pressure-fitted into a reaction vessel, bioflask, or other container. And with all of the calibration data and user settings saved to the electronics board, beginning to acquire quality oxygen readings is as easy as double-clicking the NeoFox Viewer icon on your desktop.
Fast Reaction Monitoring
Similar to respiration yet moving away from the biological realm, certain chemical reactions generate or consume molecular oxygen at sometimes very fast rates. Our HIOXY formulation without the silicone overcoat gives response times of a second or less with averaging set to a minimum, making it an ideal choice for watching how oxygen levels change during a chemical reaction.
Fuel Tank Monitoring
Particularly in aviation, it is critical to ensure that oxygen levels are at or near zero to prevent the risk of explosion. Electrochemical sensors are not ideal for such an environment, as they introduce more risk than they prevent. An optical sensor with no electrical current is more than suitable for this application, however. Our HIOXY formulation can survive in many fuel tank headspaces, and the sensor can be made more compatible with the actual liquid fuel by using our protective silicone overcoat.
Certain Hydrocarbon Environments
Non-aqueous liquid environments can be rather corrosive to sensors and other tools exposed to them, though sometimes dissolved oxygen content needs to be known. Our HIOXY formulation has the broadest chemical compatibility of our three oxygen sensor chemistries, and can be made surprisingly immune to chemical effects with our protective silicone overcoat. This overcoat can be applied to the other two oxygen sensor chemistries as well if the application calls for particular specifications.
Long-term Process Monitoring
Many industrial processes or food/beverage packaging applications require continuous long-term monitoring of oxygen in various systems. Our FOSPOR sensor chemistry is extremely stable for these types of needs, and has shown drift as low as 0.0003%/hr running at continuous duty cycle (10Hz), which works out to be roughly 5 months of continuous use with only a 1% drift in readings.
Both oxygen and pH content are very important to monitor during fermentation processes, and our optical sensors are able to accommodate each of these measurements. The stability of the FOSPOR chemistry coupled with the biologically inert silicone rubber overcoat make it an ideal solution for monitoring oxygen in bioreactors, both in the liquid and in the headspace. A non-invasive patch can be used on the inner wall of a transmissive container to maintain a closed system, or a traditional probe can likewise be used.
Food and Beverage Packaging
For food and beverages to stay fresh, they need to be packaged under modified atmospheric conditions. However, QC often relies on destructively checking selected units from a batch, as checking every package or container seems impossible. However, our low-cost self-adhesive sensor patches are a perfect solution for this, as they can be placed inexpensively into as many units as you’d like and then be read non-invasively through the container to confirm the oxygen content or lack thereof.
Medical and Pharmaceutical
All of our sensors, both in patch and probe form factors, are offered with a protective black silicone overcoat. This overcoat protects the sensor from ambient light, sample color, biofouling, and chemical degradation. Furthermore, when applied to our FOSPOR oxygen sensor patches it has also been USP Class VI certified for use in surgical procedures, drug containers, and pharmaceutical processing. USP Class VI certification is a stringent set of exposure, leaching, and animal toxicity tests that can be passed only by the most stable materials.