Amperometric Dissolved Oxygen Sensors
Reliable Amperometric DO Probes for In Situ Monitoring
Amperometric dissolved oxygen sensors utilize an oxygen permeable membrane that enables a chemical reduction reaction, which produces an electrical signal to capture the DO concentration value. These amperometric DO probes offer highly accurate measurements even at the low oxygen levels in various industrial environments. Select METTLER TOLEDO amperometric dissolved oxygen sensors have polarization times as low as one hour, simplifying maintenance and sensor inventory management.
Continuous, Real-Time Monitoring of Dissolved Oxygen Levels
Amperometric DO probes provide reliable, continuous measurements of dissolved oxygen so you can quickly adjust to changes in process conditions.
Low Polarization Time for Shorter Maintenance Cycles
Select METTLER TOLEDO amperometric dissolved oxygen sensors only require a polarization of one hour after maintenance, simplifying maintenance routines and shortening maintenance cycles.
Wide Range of Measurement, Down to Low Detection Limits
Continuously providing high-performance measurements, METTLER TOLEDO amperometric DO probes enable dissolved oxygen measurement across a wide concentration range from 0.1 ppb to saturation.
Amperometric DO Sensors with ISM Predictive Diagnostics
Amperometric dissolved oxygen sensors with ISM technology provide predictive diagnostics to determine if the sensor requires maintenance or calibration, which helps improve maintenance planning.
Available in Analog or Digital Technology
Amperometric dissolved oxygen sensors are compatible with both digital and analog installations. Analog installations can be upgraded to digital without additional investment in new peripherals.
Compliant with Hygienic Regulations
Select amperometric dissolved oxygen sensors are EHEDG certified and meet 3-A hygienic requirements to comply with your industry regulations.
Versatile DO Sensors for Various Applications
METTLER TOLEDO offers amperometric DO sensors for various industrial environments, including pure water monitoring, pharmaceutical production, chemical manufacturing and brewing.
Useful Related Links
Guide to Accurate Dissolved Oxygen Measurements
This guide covers good operating procedures and includes advice for maintaining in-line pH and dissolved oxygen (DO) sensors to ensure high measurement reliability at all times. Read more
Family Flyer Dissolved Oxygen Measuring Systems
The high performance, inline oxygen sensors from METTLER TOLEDO stand the test of time under challenging operating conditions, whether in the biotechnology, pharmaceutical, brewing or food and beverage industry. Read more
Can a Sensor Be Used for the Next Batch?
Cutting-edge measurement systems that utilize intelligent sensors that learn from your process, take all guesswork out of sensor replacement or maintenance decisions. Further, this technology also reduces the possibility of human-error, resulting in increased accuracy and reliability. Read more
DO Measurement in Primary and Secondary Wastewater Treatment
Biological processes are being more and more used to treat wastewater effluents, instead of chemical and mechanical processes. Industries using a biological treatment are those whose wastewaters are rich in organic compounds (which are used as nutrients by the microorganisms). Read more
Minimize DO Sensor Maintenance
This case study explores how EDP Group, which operates one of Brazil's largest power plants, needed to minimize DO sensor maintenance within the plant. Switching from polarographic dissolved oxygen sensors to optical sensors equipped with ISM predictive diagnostics enabled a massive drop in DO probe maintenance. Read more
Process Analytics Product Catalog
The Process Analytics Catalog provides a comprehensive overview of solutions for analytical measurements in liquid process applications, pure water monitoring and gas-phase measurement. Parameters covered include pH, dissolved oxygen, dissolved CO2, conductivity, turbidity, and total organic carbon. Read more
Explore our Services - Tailored to Fit your Equipment
We support and service your measurement equipment through its entire life-cycle, from installation to preventive maintenance and calibration to equipment repair.
FAQs
What is an amperometric dissolved oxygen sensor?
A METTLER TOLEDO amperometric dissolved oxygen sensors utilize an oxygen permeable membrane that enables a chemical reduction reaction which produces an electrical signal to capture the DO concentration value by compensating for the changing solubility of oxygen with temperature. These electrochemical DO sensors offer highly accurate measurements at the lowest oxygen levels (down to 0.1 ppb) in pharmaceutical, food and beverage, chemical, microelectronics, pure water and waste water applications. Easy maintenance is ensured with a long-lasting membrane to reduce costs and support production in your process. Amperometric DO probes also have Intelligent Sensor Management (ISM) predictive diagnostics available to provide all of the necessary information for deciding if the sensor is good for the next batch.
Which METTLER TOLEDO amperometric DO sensors are available?
METTLER TOLEDO offers a range of amperometric dissolved oxygen sensors fully suitable for various industrial applications. The InPro 6800/6850i provide maximum accuracy for vessels with limited space or in containers with smaller volumes. These electrochemical DO sensors are available with 12 or 25 mm diameter bodies in durable 316L stainless steel and with PTFE/silicone membranes. The InPro 6900(i)/6950i offer the same advanced features as the InPro 6800, with the additional benefit of being able to measure trace oxygen concentrations. In particular, the InPro 6950i sensor offers excellent accuracy at the lowest oxygen levels due to the built-in 4-electrode measurement system. For pure water monitoring, the High Performance DO Probe from METTLER TOLEDO Thornton is an amperometric DO probe that is available in analog or ISM technology and meets the fast response time and accuracy levels needed for microelectronics UPW, power and pharmaceutical water systems.
What is the difference between an amperometric DO sensor and an optical DO sensor?
Amperometric dissolved oxygen sensors are membrane based and use an electrochemical technology. Oxygen diffuses through the membrane and is reduced at a cathode that is held at a defined potential. The measured reduction current is proportional to the partial pressure of oxygen in the media. Optical DO sensors utilize fluorescence quenching technology, which is the result of an energy transfer between a fluorescing chromophore and oxygen molecules.
What are the benefits of ISM technology on an amperometric DO sensor?
With Intelligent Sensor Management (ISM) technology, installation, handling and maintenance of the amperometric DO sensor system improves significantly. The real-time electrochemical DO sensor diagnostics provide all of the necessary information for deciding if the sensor is good for the next batch. Predictive maintenance tools for pre-batch diagnostics support production planning and help avoid outages during production. With these features, efficient and safe operation of the amperometric DO probe is assured. Plug and Measure ISM technology allows you to calibrate the amperometric DO sensor away from the process and then quickly integrate it where needed. This ensures fast sensor start-up and commissioning of a measurement point.