Production of many chemicals is typically done by mixing components in a reactor, which can range from small, tabletop glass labware all the way to large, industrial sized vessels with mixers. Many components such as organic solvents or final products can be explosive or flammable, and to prevent danger during manufacture or storage the contents will be covered with a blanket of inert nitrogen. This nitrogen ensures that the minimum oxygen concentration required for combustion of whatever vapors may be present is not reached for safety reasons.
Il est possible de créer une couverture d'azote en introduisant continuellement de l'azote dans l'espace de tête des cuves, mais le fait de pouvoir mesurer les niveaux d'O2 pour déterminer si la cuve a besoin de plus de gaz permet d'économiser de l'azote, ce qui réduit les coûts. L'utilisation d'un analyseur et d'un système PLC ou DCS permet de couper le flux de N2 lorsque l'atmosphère atteint un niveau d'oxygène sûr.
Le OMD-150 is suited for constant, inline headspace analysis, and can be configured to measure the percent levels of oxygen required to ensure safety in chemical processes and storage. It is housed in a wall mountable NEMA 4X/IP66 enclosure, so it can be hosed down while cleaning tanks with no danger to the electronics. The OMD-480 provides the same precision electrochemical sensing technology in a rugged, portable package suitable for spot-checking the headspace of tanks if constant analysis is not necessary.