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Metrohm International Headquarters
Metrohm AG
Ionenstrasse
CH-9100 Herisau
Switzerland
Contact us How to find us Metrohm worldwide
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Environmental
Find out what Metrohm has to offer for environmental analysis in air, soil, and water.
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Petrochemicals / biofuel
Find out what Metrohm has to offer for the analysis of fossil or biogenic products in accordance with international standards.
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Find out what Metrohm has to offer for quality control and drug manufacturing monitoring and improving in accordance with international standards.
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Find out what Metrohm has to offer for quality control and optimization of coating processes.
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Find out what Metrohm has to offer for the monitoring of the water chemistry in thermal power plants, the wet chemical processing of solar cells and battery electrolytes, or electrochemical measurements of energy storage devices.
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Looking for a titrator?
Are you looking for the right titrator for your requirements?
- Find the right titrator here
OMNIS
New titration system for the modern laboratory: faster analysis, safer chemical handling, compliant software, more automation.
Titrando
High-end potentiometric titrator that meets any requirements: flexible, compliant, customizable, and automatable
Ti-Touch
Compact, easy-to-use potentiometric titrator for a wide range of routine titrations
Eco Titrator
New basic titrator for all standard potentiometric titration applications
Titrino plus
Entry-level, versatile potentiometric titrator for basic applications
Titrotherm
Thermometric titrator for fast determinations if potentiometric titration cannot be applied
Looking for a KF titrator?
Are you looking for the right KF titrator for your requirements?
- Find the right KF titrator here
OMNIS KF
New volumetric Karl Fischer titrator for safe, easy, and fast water content determination
KF Titrando
High-end titrators for determining any water content from 0.001 to 100%
KF Ti-Touch
Compact, stand-alone volumetric (> 0.1% water) or coulometric (down to 0.001% water) titrator with integrated touch-screen control unit
Eco KF Titrator
Basic volumetric Karl Fischer titrator for simple, safe, and reliable routine water content determinations
- Get to know Eco KF Titrator
- Product versions
KF Titrino plus
Entry-level titrator for coulometric (water content: 0.001 to 1%) or volumetric (up to 100%) water determination
Coulometers
Our range of coulometers for the determination of low water contents (0.001 to 1%).
- Go to the coulometers
Titrino Coulometer
Basic coulometer for determining low water contents (down to 0.001%)
Gas Analyzer
All-inclusive system for water determination in liquefied and permanent gases
- Get to know the Gas Analyzer
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Looking for an IC system?
Find the right IC system for your requirements here.
- Go to the IC system overview
Fast QC with IC
Increase throughput while reducing costs in the quality control of food and beverages with ion chromatography.
- Sulfites
- Infant formula
940 Professional IC Vario
High-end ion chromatography system for research applications and method development
930 Compact IC Flex
Compact ion chromatography system for routine analysis
Eco IC
Entry-level ion chromatograph for water analysis and utilization as a training tool.
Hyphenated techniques
Extend the scope of ion chromatography by interfacing your Metrohm IC with various sampling system and detection techniques
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- MagIC Net software
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IC vs. HPLC
IC is the method of choice when HPLC fails.
- Learn more …
Columns

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Looking for a meter?
Find the right meter for your pH, conductivity, oxygen, or ion measurements
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912/913/914 pH/DO/Conductometer
Easy-to-use meters for use in the lab and in the field
780/781 pH/Ion meter
Advanced pH and ion meters for use in the lab
867/856 Modules
High-end modules for customized pH, ion, and conductivity measurement
Overview of our spectroscopy product range
Find the right spectrometer for your requirements.
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Fast QC with NIRS
Learn how NIRS can boost your productivity and reduce costs in your QC lab.
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Find the right VA or CVS system for your requirements here.
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Professional VA/CVS Instruments
Advanced VA systems with high-performance viva software for determining traces of heavy metals with polarography and voltammetry with high sensitivity
Portable VA Analyzer
Portable voltammetric analyzer for the determination of trace levels of arsenic, mercury, and copper in water
Sample preparation

Process VA
Pioneers in Process Analysis
We love to tackle analytical challenges at Metrohm Process Analytics.
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Process Analyzer overview
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2060 Process Analyzers
Modular analyzer platform for ultimate flexibility in customized process monitoring.
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2060 IC Process Analyzer
Complete and flexible system for online monitoring of ionic compounds in aqueous media from ng/L to % concentrations.
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MARGA
Fully autonomous system monitoring ions in aerosols and gases in ambient air
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NIRS XDS Process Analyzers
Multi-channel analyzer for nondestructive real-time spectroscopic analysis
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NIRS Process Analyzers PRO
Analyzer for continuous nondestructive analysis by means of contact probes or noncontact measurements above a conveyor belt or through a glass window
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2035 Process Analyzers
Process analyzers available as potentiometric, photometric, and thermometric versions and optional additional pH and conductivity measurement
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202X Series – single-method Process Analyzers
Single-method process analyzers for water and wastewater monitoring with titration, pH, ISE, or photometry methods.
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ADI 204Y – Multifunctional Process Analyzers
Multifunctional process analyzers tailored to your requirements for multiparameter measurements and streams
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Overview of Electrochemistry
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VIONIC powered by INTELLO
One instrument, pure discovery for all your electrochemical research.
Compact Line
High-quality potentiostat/galvanostat instruments with a small footprint
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Modular Line
Modular potentiostat/galvanostat instruments for any requirements in electrochemical research
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Multichannel potentiostat/galvanostat instruments for simultaneous measurements
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Portable Line
Compact, PC-controlled portable potentiostat for education and basic applications
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Spectroelectrochemistry
Integrated solution for combined electrochemical and spectroscopic analysis.
Complementary products
Electrochemistry electrodes
- Electrode Finder
- Custom-made electrochemical sensors
Software
Stability measurement overview
Learn more about our solutions for stability measurement.
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Rancimat
Instrument for determining the oxidation stability of natural oils and fats
Biodiesel Rancimat
Instrument for determining the oxidation stability of biodiesel and biodiesel blends
PVC Thermomat
Instrument for determining the thermostability of PVC
Liquid Handling Overview
Learn more about our Liquid Handling solutions.
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Eco Dosimat
Modern liquid handling system for Swiss-made precision and accuracy at an affordable price.
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846 Dosing Interface
Liquid handling instrument for standalone use or integration into existing Metrohm systems
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Dosimat plus
Manually controlled, high-precision instrument for all liquid handling tasks
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Accessory Finder
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Column Finder
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Find the suitable electrode for your application: titration, IC, pH measurement, VA, CVS, electrochemistry and more.

Software Finder
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OMNIS KF – Safe, easy, and fast Karl Fischer titration
Karl Fischer titration has never been better:
- Safe handling of reagents,
- Easier titration through automatic titration start
- Time savings through automated procedures
Discover OMNIS KF

Reinventing volumetric Karl Fischer titration: OMNIS KF!

KF Titrino Coulometer

The 831 Coulometer has gained a reputation for dependability and accuracy.

This inexpensive, time-tested coulometric titrator allows you to analyze samples with low water contents (0.001 to 1%) in an easy and convenient manner.

Key features

Practical and safe: automatic reagent exchange with Dosino
Versatile: stand-alone or software-controlled
Adaptable: automated sample preparation possible

Titrino Coulometer systems (2)

831 KF Coulometer with generator electrode without diaphragm

2.831.0110

Inexpensive coulometer including titration cell with generator electrode without diaphragm for water content determination down to trace levels.This coulometer has become indispensable in many laboratories thanks to its reliability, its backlit graphical display, the multi-language dialog and the simplicity of its operation. The clear display provides information regarding the relevant titration parameters and unambiguous indication of the progress of the titration in the form of a curve showing µg water over time.Recommended measuring range: 10 µg - 200 mg absolute water

831 KF Coulometer with generator electrode with diaphragm

2.831.0010

Inexpensive coulometer including titration cell and generator electrode with diaphragm for water content determination down to trace levels.This coulometer has become indispensable in many laboratories thanks to its reliability, its backlit graphical display, the multi-language dialog and the simplicity of its operation. The clear display provides information regarding the relevant titration parameters and unambiguous indication of the progress of the titration in the form of a curve showing µg water over time.Recommended measuring range: 10 µg - 200 mg absolute water

Coulometric water determination: reliably and accurately

The 831 Coulometer has proven its worth as a reliable instrument.

Available at an attractive price, it enables you to carry out highly accurate determinations of the water content – down to trace levels.

Coulometer for water content determination

Operation boiled down to the essentials

As these coulometers are operated with Dosinos, changing the KF solution takes no more than pushing a button.

To further facilitate operation, these instruments feature two operation modes: standard and expert. In the standard mode, only the functions required for routine work are available.

Dosino dosing units compatible with ISO/DIN GL45 thread reagent bottles

Flexible system to match your requirements

This coulometer offer you a high degree of flexibility.

You can choose between a generator electrode with or without diaphragm. And you can decide whether you want to operate it with the control panel as a stand-alone system or benefit from virtually unlimited functionality by controlling it via tiamo software.

Getting the water out of the sample

In some cases, direct titration is not possible, for example:

because the sample releases the water only at higher temperatures,
because the sample does not dissolve easily, or
because it reacts with the KF reagent.

The oven method or azeotropic distillation are possible solutions. These methods involve heating and evaporating the water contained in the sample and transferring it to the titration cell. Metrohm offers various sample preparation solutions to apply these methods.

Oven method to extract water from difficult samples for Karl Fischer titration

One step further: automated oven method

If you are dealing with high numbers of samples, then why not add automation to sample preparation?
Metrohm offers two sample changers with integrated oven. Depending on your requirements, you have a choice between a compact sample changer operated via control panel and a larger, software-controlled changer.

Compact oven sample changer to extract the moisture in samples for Karl Fischer titration

Downloads

8.756.5000

Brochure: 756/831 Coulometer – Water deterination down to trace levels

(PDF 953 KB)

The Metrohm system is easy to operate and saves us a lot of time …
Lin Li, Manager Oil Analysis Laboratory, WesTrac China