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OMNIS titrators
OMNIS titrators

OMNIS titrators

All-in-one potentiometric autotitrator platform: faster results, safer handling of chemicals, and maximum modularity for easier adaptability to your requirements.

OMNIS titrators are high-end automatic titrators for potentiometric titration that allow you to consolidate all your titration applications on a single platform for efficient and safe analyses. Various customization and automation options are available and, thanks to the modular design, you can scale up your system as you go.

  • Your needs, your system: titration modes for volumetric and coulometric Karl Fischer titration (KFT) or thermometric titration (TET), automation, sample preparation, and more available
  • Higher throughput: Five manual or four fully automated titrations can be performed at the same time
  • Safe and contact-free reagent exchange: New patented Liquid Adapter system with 3S technology makes chemical handling easier
  • Higher precision: Resolution of up to 100,000 steps for accurate results
  • Higher reliability, reproducibility, and traceability of results: Modern and intuitive OMNIS Software
  • Peace of mind: Compliance with FDA Regulation 21 CFR Part 11 and EudraLex, Volume 4, Annex 11

Brochure: OMNIS – Performance on a whole new level (8.000.5456, PDF, 1 MB)

Brochure: OMNIS Titrator (8.000.5448, PDF, 205 KB)

Brochure: Thermometric Titration with OMNIS – fast, simple, and reliable (8.000.5446, PDF, 588 KB)

Brochure: OMNIS Sample Robot (8.000.5450, PDF, 1.29 MB)

Faster and more accurate measurements

TitrIC flex I with female Operator (in front of the instruments), OMNIS Sample Robot S, 856 Conductivity Module, 800 Dosino, OMNIS Titrator, OMNIS Titration Module, Dis-Cover, 120 mL Racks, 930 Compact IC Flex SeS/PP/Deg

With OMNIS titrators, you can perform up to four fully automated titrations at the same time. Compared to performing the same application on a stand-alone system, automation will save you up to 60% of time.

Using an OMNIS Sample Robot, you can profit from automated changing of up to 175 samples. Once a rack has been analyzed, it can be replaced without stopping the analysis. With the automation options for OMNIS titrators, you can increase your output without compromising on accuracy.

Learn more about the automation options for OMNIS titrators

OMNIS platform: More than just titrations

OMNIS platform: Titration, NIR spectroscopy, and auotmation on the same platform, controlled by a single software.

Does your lab also perform NIR spectroscopy analyses or need automation? We have got you covered!

OMNIS is a universal platform that lets you combine potentiometric titrators, KF titrators, NIR analyzers, and automation options of the OMNIS brand as you require. All measurements are controlled by the same software, all data is saved on the same system.

Learn more about the OMNIS platform

When potentiometric titration reaches its limits: Thermometric titration

OMNIS, OMNIS titrator, OMNIS rod stirrer, titration, thermometric titration, TET, digital thermoprobe, thermoprobe, oil samples

Some applications cannot be performed using potentiometric sensors. In these cases, sensors observing changes in temperature (i.e., thermometric sensors) are needed.

Thermometric titration is a fast and robust analysis technique for high-throughput routine analysis. You only need one sensor for all thermometric applications. No sensor callibration and, with OMNIS, no additional hardware is required. You can simply upgrade any OMNIS titrator to combine potentiometric and thermometric titration in one system.

Brochure: Thermometric Titration with OMNIS – fast, simple, and reliable (8.000.5446, PDF, 588 KB)

Even higher performance and usability: OMNIS meets Cubis

Cubis® II from Sartorius has become a fully integrated member of the OMNIS platform. The integration of the high-end Sartorius lab balance allows you to meet superior standards in terms of performance and usability.

Brochure: OMNIS meets Cubis® II (8.000.5336, PDF, 1 MB)

More safety and traceability in your lab

OMNIS Liquid Adapter

Our newly developed patented Liquid Adapter with 3S technology makes chemical handling in your laboratory easier and safer:

  • Safe chemical handling: Simply snap the adapter onto the bottle cap and avoid contact with the bottle contents.
  • Secure information transfer: The RFID chip in the bottle cap provides all relevant information on the content of the bottle.
  • Smart connection: The reagent data is automatically transmitted to the titration system.

Intuitive and user-friendly concept

LEDs showing if instrument is ready or if an error occurred

Minimize titration errors. LEDs on the instruments show the status of the instrument, indicating if the system is ready or if there is an error. This intuitive concept was also applied to OMNIS Software featuring drag-and-drop functionalities as well as pre-installed methods and context-sensitive help.

Which titrator fits your requirements?

Talk to your Metrohm representative and learn about the best solution for your needs!

Are you still carrying out manual titrations?

Download free white paper

Download our free white paper “Recommendations for converting a manual titration procedure into an automated titration procedure” and learn what you have to consider when switching to automated titration.

Find applications for Titration

Automatic potentiometric titrators – FAQs

What is a potentiometric titrator?

A potentiometric titrator uses the difference in potential (mV) between the solution containing the analyte and a reference potential to determine the equivalence point and endpoint of a titration.

Are you looking for a volumetric or coulometric titrator? Go to our OMNIS solution for volumetric Karl Fischer titration or our Karl Fischer coulometers

Which titrations can I perform with a potentiometric titrator?

Potentiometric titrators are used to perform any kind of titration types: acid-base, oxidation reduction (redox), complexometric, precipitation, non-aqueous, argentometric, pH, and ion-selective titrations. Learn more in the following blog articles and documents:

Blog: Ion-selective electrodes: General tips

Blog: Avoiding the most common mistakes in pH measurement

Blog: Non-aqueous acid-base titrations – Common mistakes and how to avoid them

Learn more about the various titration types

Download your copy here

The free monograph "Practical titration" covers the theory of titration explaining titration reactions, indication methods, electrodes, and titrants. In the practical part, acid-base, precipitation, redox, complexometric, and chelometric titrations are discussed.

Learn more about non-acqueous titrations

Download your copy here

The free monograph "Non-aqueous titration of acids and bases with potentiometric endpoint indication" goes through the process of acid and base titrations.

What equipment is needed for potentiometric titration?

The titrator is equipped with a reference electrode and an indicator electrode or with a combined sensor including both the reference and indicator electrode in one electrode. A stirrer and buret are also needed for potentiometric titrations.

Metrohm offers a variety of electrodes depending on your application. Learn more about electrodes in the following blog articles or documents or find a suitable electrode with our Electrode Finder:

Flyer: Electrodes for titrations – Which electrode for which application? (8.109.6005, PDF, 196 KB)

Blog: Best practice for electrodes in titration

Go to Electrode Finder

What is an automatic titrator?

An automatic titrator, or autotitrator, performs the titration procedure automatically, including endpoint and equivalence point detection, results calculation, sample preparation, and sample series analysis. The steps performed by an automatic titration system from Metrohm are:

  1. The titrant is added with an automated piston buret. This ensures that the volume of titrant added is precise.
  2. A stirrer mixes the sample solution during the titration. This ensures reproducible results.
  3. The electrode detects the endpoint. This removes subjectivity of color changes present in manual titrations.
  4. The results are automatically calculated and displayed. This limits the risk of human errors.

With sample robots such as the OMNIS Sample Robot from Metrohm, you can take automation one step further. The OMNIS Sample Robot allows you to analyze up to 175 samples in one run, completely unattended.

Learn more about autotitration and the advantages over manual titration in our blog:

Blog: Why consider automation – even for simple titrations

Blog: Why your titration results aren't reproducible: The main error sources in manual titration


What are the benefits of automated titration?

Auto titration, or automated titration, brings considerable advantages to your laboratory. Manual titration is known as a process prone to errors and the results can depend on the skill level of the chemist, even when using the same equipment.

Automated titration allows you to:

  • Save time: Automated systems can run unattended for several hours or even days, giving you more time for other tasks
  • Save money: The improved handling procedures of automated systems reduce the amount of consumables needed
  • Increase your profit: Automation increases your sample throughput
  • Rely on your results: Automation gives highly precise results and increases the accuracy, and repeatability of your measurements
  • Stay safe: Walk-away automation minimizes direct contact with harmful substances and reagents

Learn more in our blog and on-demand webinar:

Blog: Save money by using automated titration systems

Blog: How to transfer manual titration to autotitration

Webinar: Improve titration reproducibility and efficiency with automation