Measure Oxygen Where it Matters Directly in the Process Stream

Performance of gaseous oxygen measurement is now redefined with METTLER TOLEDO’s amperometric systems. They not only allow reliable and stable measurement, they are inexpensive to maintain and can be installed without a gas sampling system.

Unwanted oxygen
Oxygen levels in industrial processes are heavily controlled to contain the risk of explosion of flammable liquids and dusts, as well as to protect products against oxidation. Not only is oxygen monitoring a critical issue in transport systems, storage tanks or centrifuges, it can also negatively affect the yield of a chemical reaction in a vessel.

Many solutions – which is best?
When selecting a vendor for a measurement system, technologies and solutions in many cases a trade-off exists between sufficient performance and reliability, a reasonable maintenance effort and system availability. In order to function correctly, paramagnetic systems need to protect the measurement cell from heat, moisture and / or corrosive gases. However, the more instruments there are between the process and the sensor, the longer the response time will be and the higher the probability of system failure.

Amperometric: simple and reliable
Looking at the field of dissolved oxygen measurement however, membrane-based amperometric sensors using the Clark principle offer an alternative. For decades they have demonstrated optimum performance in a wide range of applications ranging from fermentation processes in breweries, biopharmaceutical industries or in chemical process applications.

This technology, with a proven industrial track record due to its simplicity and ruggedness, is ideally suited for the in-situ measurement of gaseous oxygen. METTLER TOLEDO offers a comprehensive range of amperometric systems with sensors for wide application coverage, retractable housings for sensor extraction without process interruption, and transmitters for signal conversion and connection to process control systems using HART, FOUNDATION fieldbus or PROFIBUS. The complete measurement system is available with ATEX Zone 0 / FM Class 1 Div 1 approval if required.

Amperometric sensors can be maintained in two minutes, with minimum impact on your running process. All that is required is to replace the membrane body and fill it with fresh electrolyte solution. Subsequent calibration can be performed on site using air as a calibration gas.

Intelligent sensors for smart processes
All amperometric sensors from METTLER TOLEDO are available in digital versions equipped with intelligent Sensor Management (ISM) technology. With the Plug and Measure feature, pre-calibrated sensors can be immediately used in the process, minimising the time necessary for maintenance and without the need for specialist know-how. Additionally, ISM sensors have built-in self-diagnostic abilities in order to detect early signs of failure such as low electrolyte levels, and alert users before measurement quality or process availability is impacted.

Find out more:
Call: 0116 2357070
www.mt.com/o2-gas
www.mt.com/ISM