Karl Fischer Titration analytical moisture titrators and components

Analytical moisture titration systems and assemblies by Karl Fischer Titration: titration vessels, generator electrodes, burettes, and solvent exchange units.

Karl Fischer Titration coulometric and volumetric titration vessels

Karl Fischer Titration analytical vessels are engineered from borosilicate glass 3.3 with standard taper ground joints NS 19/26 and NS 29/32. Vessels feature fluoropolymer screw closures, leak-tight septum ports, and sample inlet channels for introducing analytes without atmospheric air entry.

Precision borosilicate vessels with ground joints for repeatable analytical setups
Direct injection ports with resilient PTFE-coated silicone septum inserts
Interchangeable vessel designs for both coulometric and volumetric configurations
Chemical-resistant sealing rings and threaded adapters for laboratory vessels

Karl Fischer Titration generator electrodes with and without diaphragm

Karl Fischer Titration generator electrodes facilitate precise electrochemical iodine generation within anolyte solutions. Diaphragm units with ceramic frits serve trace water determination, whereas diaphragm-free electrodes streamline moisture determination in hydrocarbon matrices.

Options with ceramic porous diaphragm or open diaphragm-free electrode design
Large-area platinum mesh grid ensuring uniform electrolytic current density
Direct connection interface for digital coulometric titration control units
Proven chemical durability against aggressive amines and organic solvent mixtures

Karl Fischer Titration double platinum pin indicator electrodes

Karl Fischer Titration indicator electrodes monitor analytical titration end points via bipotentiometric or voltammetric indication. Two parallel platinum pins detect sharp polarization changes when excess iodine appears inside the analytical solution upon completion of water binding.

Dual high-purity platinum pins providing rapid electrochemical reaction response
Precision glass body with ground joint for reproducible positioning depth
Stable electrical polarization characteristics during long analytical shifts
Resistant to fouling and deposit formation across diverse chemical mediums

Karl Fischer Titration automated dosing burettes and exchangeable units

Karl Fischer Titration burette assemblies provide incremental titrant dosing resolution reaching 1/10000 of cylinder volume. Each exchangeable assembly integrates an annealed glass cylinder, wear-resistant PTFE plunger tip, and multi-port ceramic fluid distribution valve.

Interchangeable calibrated cylinder volumes covering 5, 10, 20, and 50 ml
Precision PTFE plunger seal preventing titrant leakage and crystallization
Integrated electronic chip storing burette volume and calibration factors
Chemically inert ceramic valve distributing reagent with zero backlash

Karl Fischer Titration solvent exchange pumps and liquid handling modules

Karl Fischer Titration solvent pump stations automate reagent replenishment and waste extraction without exposing analytical cells to ambient humidity. Fluidic systems shield operators from toxic solvent fumes and eliminate moisture contamination during routine solution renewal.

Integrated peristaltic and diaphragm pump heads for solvent handling
Flexible tubing sets manufactured from fluoropolymer and Viton compounds
Automated operation driven by titrator user interface or manual switch
Waste bottle caps equipped with exhaust filters to trap vapor emissions

Karl Fischer Titration drying tubes and moisture trap cartridges

Karl Fischer Titration drying cartridges protect titration vessels and reagent bottles against atmospheric humidity infiltration. Tubes accommodate molecular sieves and color-indicating desiccant beads to provide visual indication of moisture saturation levels in demanding environments.

Borosilicate and polymethyl glass bodies with standardized threaded caps
Molecular sieve filling engineered for rapid moisture absorption dynamics
Elastomeric seals maintaining tightness under elevated environmental humidity
Particulate barrier filters preventing fine absorbent dust from vessel entry

Coulometric water determination in Karl Fischer Titration systems

Coulometric Karl Fischer titration provides high precision for trace moisture determination from 1 ppm to 5% across solvents, insulating transformer oils, and chemical products.

In Karl Fischer Titration coulometers, iodine is generated directly inside the reaction vessel via constant-current electrolysis of iodide ions at a platinum mesh anode.

The quantity of reacted water obeys Faraday law in direct proportion to the accumulated electrical charge, which eliminates the necessity of manual reagent titer standardization.

For heavy petroleum oils, diaphragm-free generator electrodes prevent pore clogging and facilitate rapid assembly cleaning.

Volumetric moisture analysis for broad concentration ranges

Volumetric Karl Fischer analysis determines moderate and high water content ranging from 0.1% to 100% in solid, viscous, and liquid samples.

In Karl Fischer Titration volumetric analyzers, calibrated titrant solution is dispensed from an automated burette driven by a precision stepper motor that provides volume resolution down to fractions of a microliter.

Titration continues until all available water molecules within the solvent matrix are consumed, with reaction completion detected by sharp polarization changes across a double platinum pin sensor. Automated titer determination against verified water standards ensures repeatable results.

Electrode selection between diaphragm and diaphragm-free models

Electrode selection between diaphragm and diaphragm-free configurations depends on solvent polarity and sample fouling behavior.

Karl Fischer Titration generator electrodes with porous ceramic frits separate anode and cathode compartments, preventing reduction products from re-oxidizing at the anode and ensuring extreme accuracy for trace moisture levels below 50 ppm.

Diaphragm-free generator electrodes feature open electrode geometry and represent an optimal choice for crude oils, diesel fuels, and polymer solutions because the platinum surfaces are easily wiped clean without frit clogging.

Bipotentiometric end point indication with dual platinum sensors

Dual platinum pin indicator sensors serve as the sensing element for automated Karl Fischer Titration systems. A stabilized alternating or direct polarization current is applied across the platinum pins, maintaining an elevated potential difference while excess water is present in the solvent.

When the equivalence point is reached and unreacted iodine appears, electrode polarization drops sharply, generating an electrical signal that instructs the titrator microprocessor to halt burette dosing.

Periodic ultrasonic cleaning of platinum pins in diluted nitric acid removes passivating surface films and restores sensor response.

Automated exchangeable burette units and ceramic valve design

Precision exchangeable burette units for Karl Fischer Titration comprise an annealed borosilicate cylinder, a durable PTFE plunger tip, and an inert ceramic switching valve.

The instrument control unit reads an integrated electronic memory chip storing cylinder volume, assembly date, and dosing cycle history. The ceramic valve design guarantees zero dead volume and prevents titrant leakage.

To eliminate salt crystallization and plunger sticking during prolonged downtime, sliding mechanical seals are protected by fluid rinsing grooves filled with protective alcohol barrier solution.

Moisture protection and automated solvent handling stations

Reliable moisture isolation in Karl Fischer Titration setups is achieved through drying cartridges packed with molecular sieves and automated solvent exchange stations.

Type 3A molecular sieves selectively adsorb ambient water molecules from air ingress, preventing baseline drift during instrument standby.

Hermetic peristaltic pump assemblies transfer spent analytical solutions directly into closed waste containers equipped with vapor filters, protecting laboratory personnel from volatile solvent fumes and enabling automated reagent renewal without opening titration vessels.

Karl Fischer Titration and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Karl Fischer Titration and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.