Oxygen measurement and control plays an important role in countless processes across the chemical, pharmaceutical, biotechnology, power, and food & beverage industries. Dependable in-line measurement of O2 in liquid and gaseous mixtures is vital for providing continuous, real-time data on oxygen levels. The oxygen theory guide is a comprehensive referene and training tool.

Dissolved Oxygen, Dissolved Carbon Dioxide, Dissolved Ozone Frequently Asked Questions (FAQ)
In-line Dissolved Oxygen Sensor | CO2 Sensor | Carbon Dioxide Probe | Dissolved Ozone Sensors |
High performance optical and polarographic dissolved oxygen sensors for chemical, pharmaceutical, power, food and beverage industries and microelectronics, pure and waste water applications. | In-line dissolved CO₂ measurement for optimizing production and maintaining quality in biotech, pharmaceutical and beverage production. | In-line dissolved ozone (O₃) sensors for process control provide reliable monitoring in pure water applications. |
Lowest DO level detection from 0.1ppb to saturation Highest accuracy and minimal maintenance effort Sterilizable and able to withstand repeated CIP treatment Models available for hygienic applications Predictive diagnostics with Intelligent Sensor Management (ISM) | Real-time CO₂ monitoring to manage fermentation Eliminate challenges and costs of grab sampling Full data traceability to support regulatory needs Built-in SIP, CIP and autoclave counter Made of FDA-compliant materials | Rapid ozone response tracks sanitization processes Simple maintenance with slip-on membrane Accurate ozone measurement down to zero ppb Predictive maintenance for maximum uptime Fast start-up with Plug and Measure technology |
![]() | ||
Portable Dissolved Oxygen Meter | Single Use Sensors for Bag Manufacturers | Intelligent Sensor Management (ISM) Accessories |
Portable DO meter for at-line ppb-level sampling or as a temporary on-line solution. Uses optical dissolved oxygen measurement for stable, accurate results. | Single use sensors for measuring pH and dissolved oxygen in bioprocessing applications requiring single use bags. | ISM accessories such as software or transmission solution allow you to take full advantage of ISM technology. |
Mobile oxygen measurement solution Easy and intuitive touchscreen operation IP67 enclosure resists wet environments Cleanable flow-through design for at-line sampling Stores data for up to 99 measurements points | Designed for 1" Eldon James port disc Suitable for use in a wide range of applications Long-term measurement stability Ideal for welding to bag stock | Calibrate your sensors away from the process Monitor sensor history, diagnostics & inventory Easy system verification with sensor simulators Connect sensors to a computer or mobile |
High performance optical and polarographic dissolved oxygen sensors for chemical, pharmaceutical, power, food and beverage industries and microelectronics, pure and waste water applications.
In-line dissolved CO₂ measurement for optimizing production and maintaining quality in biotech, pharmaceutical and beverage production.
In-line dissolved ozone (O₃) sensors for process control provide reliable monitoring in pure water applications.
Portable DO meter for at-line ppb-level sampling or as a temporary on-line solution. Uses optical dissolved oxygen measurement for stable, accurate results.
Single use sensors for measuring pH and dissolved oxygen in bioprocessing applications requiring single use bags.
ISM accessories such as software or transmission solution allow you to take full advantage of ISM technology.
Publications

Guide to Oxygen Theory

Guide to Accurate Dissolved Oxygen Measurements
Achieving high quality products is possible with a stable, predictable and consistent production process. The accuracy of process analytics in-line sensors plays a major role in monitoring manufacturing to ensure the required process conditions are always being met. This guide covers good operating procedures and includes advice for maintaining in-line dissolved oxygen and pH sensors to ensure high measurement reliability at all times.

Process Analytics Product Catalog
The Process Analytics catalog includes product features and specifications, benefits and recommended application areas, order details and much more for process analytics measurement solutions. You will find the information you need quickly and easily.
Services
Find out more about our services

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.
Videos
Avoid Noisy Signals of Dissolved Oxygen Sensors
Dissolved oxygen sensors can often produce a noisy signal due to the bubbles, which accumulate at the sensor tip. METTLER TOLEDO's Anti-Bubble OptoCap dissolved oxygen sensor prevents bubbles from adhering and collecting.
C0₂ Sensor Assembly
Assembling a standard CO2 sensor is time consuming and involves many steps. METTLER TOLEDO's CO2 InPro 5500i sensor has a one piece membrane body. This convenient design makes maintenance fast and simple.
Dissolved Oxygen Measurements in Breweries
Breweries require that dissolved oxygen sensors are rugged, easy to use and simple to maintain. METTLER TOLEDO's InPro 6970i sensor meets all expectations and measures product quality and taste.