optical DO sensor Mettler-Toledo InPro 6860i

Mettler Toledo Insitu O2 Probes - InPro 6860i

Optical DO Sensor - Mettler Toledo InPro 6970i

Optical DO Sensor

Optical DO Sensor / Dissolved Oxygen Probe

Combining innovative ISM technology with high-end optical measurement, METTLER TOLEDO offers an optical DO sensor line fully suitable for biopharma or brewing applications. The InPro 6860i (pharma) and InPro 6970i (brewing) offer highly accurate oxygen measurements with enhanced stability and easy handling without electrolyte change or time-consuming polarization procedures. The DO probe is equipped with a digital interface (digital ISM and Modbus RTU) plus analog output signal for direct integration into existing bio controllers, analog transmitters and into process environments including HART communication protocol.

METTLER TOLEDO Intelligent Sensor Management

InPro 6970i: Optical DO Sensor for Brewery and High-Performance Applications

Optical DO Sensor - Mettler Toledo InPro 6970i

The InPro 6970i/12/120 is a high-performance optical dissolved oxygen sensor designed for fast response and high reliability. Engineered for use in demanding process environments, this sensor is especially well-suited for brewery applications, including filler lines and other fast-moving or hygienic processes.

Key features include:

• Wide measurement range: 0 to 2000 ppb DO
• Rapid response time for real-time monitoring
• Robust construction for harsh or high-flow conditions
• Low drift for long-term measurement stability
• Integrated ISM^® technology for predictive diagnostics and easier maintenance

Whether you’re monitoring oxygen in a critical bioprocess or ensuring quality control in beverage production, the InPro 6970i delivers speed, stability, and ease of use with minimal calibration requirements.

Specifications – InPro 6970i/12/120

Measurement Parameter	Oxygen
Measurement Technology	Optical fluorescence quenching
Accuracy	± (1% of reading + 2 ppb)
Response Time	T98 < 20 s
Primary Media/Application	Food and Beverage
ISM (Digital) or Analog	ISM (Digital)
Wetted Metallic Material	316L stainless steel
Surface Roughness of Wetted Material	N5/Ra16 (Ra = 0.4μm / 16μin)
Sensor Diameter	12 mm
O-Ring Material	EPDM
Process Connection	Pg 13.5
Sensor Length	120 mm
Wetted Membrane Material	Silicone
Connector Design	Straight
Model Family	InPro 6900i optical series
Autoclavable/Sterilizable	Yes
CIP Resistant	Yes
Mechanical Temp. Range	23 °F – 250 °F (-5 °C – 121 °C)
Operating Pressure (Bar)	0.2–12 bar
Operating Pressure (PSI)	2.9–174 PSI
Design Pressure	174 PSI (12 bar)
Digital Integration	RS485 – ISM
Cable Connector	M12 5-Pin
Hygienic/Biocompatibility Approvals	FDA / USP Class 7
Certificates & Approvals	Quality certificate, Material certificate 3.1, Surface finish certificate, FDA / USP Class IV
Measurement Range	0–2000 ppb saturation
Residual Signal in O₂-Free Media	< 0.025 of signal in ambient air
Sterilizable/Autoclavable	Sterilizable
Operating Range	2 ppb – 2000 ppb
Measured Pressure Resistance	0.2 bar – 12 bar
Measuring Temp. Range	23 °F – 104 °F (-5 °C – 40 °C)
Detection Limit	2 ppb

What exactly is ISM?

With Mettler-Toledo’s advanced Intelligent Sensor Management (ISM), these concerns are a thing of the past! ISM has been around for years helping all kinds of processes have accurate and assured calibrations and maintenance statuses throughout the whole line of Mettler-Toledo sensors. This technology sends you automatic diagnostic data about your sensor’s:• Health • Dynamic lifetime • Calibration quality
• Glass strength • Sensor driftUtilizing this technology would allow you to go into a run or experiment 100% certain that your probes will not be an issue and can move forward with peace of mind. By choosing one of the many Mettler-Toledo sensors equipped with ISM technology, you’ll save on manual labor, experimental waste/time, and be sure you won’t have experimental error due to sensor drift or misreading. With all of this, it makes it an easy choice to move towards ISM probes for your R&D lab or large-scale facility.Which brings us to a really BIG announcement…Mettler-Toledo recently launched ISM 2.0 which comes equipped with the same features described but with greater control, reliability, and software to bolster the ease of use and peace of mind that comes with these sensors. ISM 2.0 adds upgrades to the lifetime and calibration algorithms that make them even more accurate at telling you the health and quality of your data and sensors. The upgrade comes partnered with more robust software for enhanced process reliability.Check Out These Popular ISM Sensors