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Digital dissolved oxygen sensors with Intelligent Sensor Management (ISM) technology are in-line analytical sensors designed to provide a continuous measurement of dissolved oxygen in process manufacturing or water systems. ISM dissolved oxygen sensors use adaptive algorithms to provide you with real-time predictive diagnostics for your sensor. This technology helps to reduce maintenance costs, simplify sensor handling and increase process reliability.
METTLER TOLEDO's digital DO sensors provide precise measurements via our innovative ISM technology that is unaffected by electrical interference or data loss due to long cable runs.
These digital dissolved oxygen probes are made of high-quality materials to ensure reliability in production environments and cleanability in hygienic environments.
ISM DO sensors use real-time information on sensor conditions to provide predictive diagnostics that clearly indicate, in days, when maintenance or replacement parts will be needed.
ISM digital dissolved oxygen sensors provide consistently reliable measurement accuracy, even at trace, ppb-level detection limits, making them suitable for brewing and pure water applications.
Plug and Measure technology in these digital DO sensors allows a sensor to be calibrated away from the process in a controlled environment. This enables fast, error-free measurement from the start.
METTLER TOLEDO offers digital dissolved oxygen sensors in both amperometric (polarographic) technology and optical technology, allowing you to switch to digital measurement without process changes.
A digital dissolved oxygen sensor an in-line analytical instrument designed for continuous DO monitoring and control with real-time results, for a range of industrial processes. METTLER TOLEDO's digital dissolved oxygen sensors use a technology called Intelligent Sensor Management (ISM). ISM dissolved oxygen sensors offer a strong digital signal to prevent signal interference, so you can place your dissolved oxygen analyzer wherever you need it. They offer predictive diagnostics that clearly show in days when your ISM DO sensor will need replacement parts or calibration.
Digital dissolved oxygen analyzers work based on the technology of the METTLER TOLEDO DO sensor selected. METTLER TOLEDO offers two digital DO sensor technologies: Amperometric and Optical.
Amperometric: These in-line dissolved oxygen sensors use a gas-permeable membrane to separate the sample from an electrochemical cell in the sensor. Oxygen diffuses through the membrane in direct proportion to the partial pressure of oxygen in the liquid outside the in-line DO sensor. A cathode and anode inside the probe are polarized with a voltage to enable the electrochemical reaction of oxygen. Oxygen is reduced at the cathode while the anode is oxidized, producing a small current in direct proportion to the amount of oxygen in the sample. In addition, the dissolved oxygen sensor uses the temperature value to convert the oxygen partial pressure signal to a dissolved oxygen concentration value by compensating for the changing solubility of oxygen with temperature.
Optical: These in-line dissolved oxygen probes use optical technology for measurement. They contain an oxygen-sensitive layer that can fluoresce. This layer absorbs light from a light emitting diode in the sensor, and the light is released as fluorescence. The fluorescence lifetime depends on the amount of oxygen present in the sample medium.
ISM dissolved oxygen sensors store their own calibration data, so they can be quickly and accurately calibrated in any convenient location without having to adjust the transmitter. To increase productivity, ISM technology also provides accurate diagnostic tools to notify you when your sensor needs calibrated. Calibration processes vary based on the technology and type of sensor, but all digital dissolved oxygen sensors can be calibrated on-site by trained technicians.
METTLER TOLEDO has a wide range of in-line digital DO sensors, including
InPro 6850i digital amperometric dissolved oxygen sensors for sterile conditions
InPro 6860i digital optical DO sensors suitable for hygienic environments
InPro 6900i/6950i amperometric DO probes for brewing
InPro 6900i optical digital DO sensors for brewing
Digital UPW DO Sensors suitable for semiconductor water and power plant cycle chemistry.