Optical Oxygen Sensor Benefits Beer Production

Mettler Toledo's Inpro 6970i is an optical oxygen sensor that, by ensuring oxygen is kept to a minimum during the brewing process, helps to improve the quality, flavour and shelf life of beer. Based on fluorescence-quenching technology, Mettler Toledo claims the Inpro 6970i combines high measurement performance with Intelligent Sensor Management (ISM) functionality. According to the company, optical oxygen sensors offer many advantages over amperometric sensors: these include reduced and easier maintenance and long-term stability, resulting in reduced cost of ownership.

The only consumable, the Optocap, is claimed to have a longer lifetime then amperometric membrane bodies and is designed to be easily replaced within a few minutes. No polarisation or liquid handling is necessary and once the sensor is calibrated, it is ready to use. ISM technology simplifies maintenance planning and documentation of all sensor data. Diagnostic tools continually monitor the quality of the sensing element and all sensor components. Early signs of sensor ageing or failure are immediately displayed to the user.

The sensor's plug and measure ability allows it to be connected to an M400 transmitter, and all data, including calibration and information about the sensor history, such as the stresses that the sensor has been exposed to, the number of CIP cycles and much more, are transferred to the transmitter. The system becomes ready for use within a few seconds and no complicated configuration at the point of use is required. According to Mettler Toledo, some of the biggest breweries in the world have already introduced the Inpro 6970i as a new standard for all low ppb applications in their brewing processes.

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