--- title: Karl Fischer Oven Evaporator description: Karl Fischer Evaporators separate water from samples and move it for titration. --- [![CSC Scientific Company, Inc.](https://www.cscscientific.com/hs-fs/file-1239671252-jpg/images/csc-logo-1.jpg "CSC Scientific Company, Inc.")](https://www.cscscientific.com/?hsLang=en-us) # Karl Fischer Oven/Evaporator System For some samples, such as products that cannot be dissolved in available reagents or products that will only release moisture at high temperatures, a **Karl Fischer Oven **or** Evaporator** is needed. ### Other Karl Fischer Pages - **[About Karl Fischer](https://www.cscscientific.com/moisture/karl-fischer/?hsLang=en-us)** - **[Coulometric Karl Fischer](https://www.cscscientific.com/moisture/karl-fischer/coulometric-titrators---aquapal-iii/?hsLang=en-us)** - **[Volumetric Karl Fischer](https://www.cscscientific.com/volumetric-titrators?hsLang=en-us)** [![Review This Instrument](https://no-cache.hubspot.com/cta/default/75757/78249f0e-d17c-4f5e-a433-f7871152b300.png)](https://cta-redirect.hubspot.com/cta/redirect/75757/78249f0e-d17c-4f5e-a433-f7871152b300) ### Oven Titrator Combinations ## Low Moisture For samples with moisture below 1% a Karl Fischer Oven/Evaporator with a Coulumetric Titrator is recommended. ![Karl Fischer Oven and Coulometric Titrator](https://www.cscscientific.com/hs-fs/images/MKC%20520%20lem%20Coulometric%20Titrator%20with%20Evaporator.jpg?width=170&height=129&name=MKC%20520%20lem%20Coulometric%20Titrator%20with%20Evaporator.jpg) Combination of ADP611 Evaporator and MKC Coulometric Titrator. ## Water Content Greater Than 1% For samples with moisture greater than 1% Karl Fischer Oven/Evaporator with a Volumetric Titrator is recommended. ![KF Oven and Volumetric Titrator](https://www.cscscientific.com/hs-fs/images/KEM%20520-4%20Volumetric%20Titrator%20wirh%20Evaporator.jpg?width=170&height=134&name=KEM%20520-4%20Volumetric%20Titrator%20wirh%20Evaporator.jpg) Combination of ADP 611 Evaporator and MKC Volumetric Titrator. # Karl Fischer Ovens ## What is Karl Fischer? The** Karl Fischer Method** was invented by a chemist by that name. It is a process based on the reaction of iodine with water. The starting point of the measurement is the introduction of the test sample into an airtight titration cell containing a solvent. The reaction results in a substance with very low conductivity. The conductivity of the sample in solution is reduced by the** Karl Fischer Reaction**. The end-point of this process is determined when the conductivity is reduced to the level present before the sample was introduced. The **Karl Fischer Method **is one of the few techniques that will measure water content and not be affected by other volatile elements. It has the added benefit that it will often get at bound water. ## Why a Karl Fischer Oven? For a product to work with the **Karl Fischer Chemical Reaction**, it needs to be able to dissolve in a solvent compatible with the **Karl Fischer Reagents**. Some materials will not dissolve in or will cause side reactions with acceptable solvents. Other materials will not release their water except at high temperatures; for example: products such as plastics and a number of inorganic salts. ![KF Oven ADP611](https://www.cscscientific.com/hs-fs/hubfs/KF%20Oven%20ADP611.jpg?width=300&name=KF%20Oven%20ADP611.jpg)To use the** Karl Fischer Method** with these materials, the sample must be heated, in some cases to 300°C. A **Karl Fischer Oven or Evaporator** is used for this purpose. The oven is, in effect, a tube furnace. The moisture driven off in this furnace is transferred to the titration cell by a dry, inert gas. Our solution to this type of material is to use an oven manufactured by KEM, along with a matching Coulometric Karl Fischer Titrator for samples with low moisture or a Volumetric Karl Fischer Titrator for samples with higher water content. ## Karl Fischer Oven/Titrator Combinations to Perform Moisture Tests These combinations are an **ADP 611 Oven/Evaporator** with a **Coulometric Titrator, **or the same Oven/Evaporator with a **Volumetric**** Titrator.** Photographs of these combinations are shown in the left column of this page. Call us at 800-621-4778 to learn more.     ### Find Out If a Karl Fischer Oven Will Help You. ### Follow CSC Scientific CSC Scientific Company, Inc 2799-C Merrilee Drive Fairfax VA, 22031 800-621-4778 703-280-5142 (fax) csc@cscscientific.com [![credit cards](https://cdn2.hubspot.net/hub/75757/images//creditcard.gif)](http://www.cscscientific.us) No part of this page or any other page in this site may be copied or reproduced in any way. 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