Koehler Instrument K90500 / K90590 TAN-TBN Titrator

Condition: New Brand new item from stock or on order from manufacturer
Alternate Names:
total acid-base number titrator
Stock #:
specify: 115 or 230 Volts, 50/60 Hz, 40W
Product Description
For determination of Total Acid Number (TAN), Total Base Number (TBN), Saponification Number, Mercaptan Sulfur, Chloride Content and Karl Fischer Water Content of petroleum products, lubricants, transformer insulating oils and Crude Oil.
Titration is the fundamental chemical analysis procedure whereby the concentration of a chemical substance in solution is determined by reacting it with a measured amount of another chemical. The Auto titrator performs this analysis using a motor driven dispenser, stirred reaction vessel and electrodes which sense the completion of reaction by measuring the potential difference between two electrodes. Automatic Titration increases accuracy, repeatability and reproducibility as well as minimizing errors in calculation and documentation.

***Set up to perform TAN and TBN (as per ASTM D664 & ASTM D4739). Electrode K90500-48 will be required to perform TBN testing as per ASTM D2896***

The Automatic Titrator is capable of performing a wide range of Titrations:
~ Acid-base or aqueous titration
~ Redox titration
~ Complexometric titration or EDTA titration
~ Blank titration
~ Silver Assay titrations
~ Non-aqueous titration
~ Argentometric or Precipitation titration
~ Voltametric / KF Titration
~ Back titration

The Automatic Titrator is provided with two-point auto calibration and standardization (zero offset). The instrument is capable of displaying pH and mV of the sample, with temperature compensation. The Automatic Titrator can accept a variety of electrodes to cater to various applications in different fields. The liquid path is comprised of Teflon tubing, a Teflon lined valve and gas tight burette with a Teflon plunger head. It creates a chemically inert system for any sensitive analysis. The instrument is supplied with high speed vortex stirrer with digital speed indication. This specially designed stirrer provides excellent homogenous mixing of samples. An optional magnetic stirrer is also available.

Conforms to the Specifications of: ASTM D94, D664, D2896, D3227, D4377, D4739, D4929
Principle: Volume determination by equivalence point, end point or pH STAT.
Modes of Operation: Incremental, Equilibrium, Cut-off by pH, pH STAT Titration
Control: Microcontroller based
mV range: ± 3200 mV.
TAN Range: 0.01 to 260 mg KOH/g
Accuracy: ± 0.1 mV (± 0.0016 pH).
Amplifier input impedance: > 10 ohms
Burette Resolution: 1/5000(5ml),1/10000(10ml),1/5000(25 ml)
Filling time: Less than 20 seconds
Keyboard: Alphanumeric splash waterproof polyester
Display: 40 x 2 line back lighted liquid crystal display (LCD).
Titration Head: Manual stand with swiveling arm.
Stirrer System: Microcontroller based variable speed, high torque vortex stirrer with digital indication. (Magnetic Stirrer optional)
Electrodes for Potentiometric titration - (pH, Ion, Redox, Argentometric).
a) Any combination electrode. b) Differential Electrode System comprising sensing (Indicator) Electrode with BNC Connector and Reference Electrode with 4mm Banana Connector.
Electrode for KF/Voltametric titration with BNC/TNC Connectors.
Temperature sensor (PRT/PT100)
Calibration: 3-point Calibration with user entered buffer values and standardization with 7 pH buffer.
End Point detection: a) Potentiometric, b) Voltametric, c) Thermometric and Photometric.
Cut-off criteria: a) Volume b) End point c) mV/pH.
Titrations: a) Acid base, b) Nonaqueous. c) Redox d) Preciptiation e) Complexometric f) back titration **KF titration (Optional)
Results: a) Molarity b) % Assay(wt), c) % volume (ml) d) ppm e) mg/l f)mg/g g)g/l h) meq/l i) mol/kg j) TAN and TBN for oil samples.
Method Storage: 50 methods with parameters.
Titrant Molarity storage: 20 values
Electrical Requirements:115V, 60Hz or 230V, 50Hz

Input/Output Peripheral Interface:
(a) Parallel Port: 1 - for printer
(b) Serial Port: 2 - for Balance & PC
~ 10mL Burette Assembly:
~ 10mL Syringe
~ Tubing
~ Connectors
~ Valve
~ Moisture Filter
~ Glass Dispensing Tip
~ Mounting Stand
~ Microprocessor Controlled Vortex Stirrer
~ Electrode for Non-Aqueous Titration
~ 150mL Glass Beaker (3)

K90500-1 Karl Fischer Titrator Burette Assembly
K90500-2 Filter Desiccant Dryer Tube
K90500-3 Vortex Stirrer
K90500-4 Magnetic Stirrer
K90500-6 Reaction Vessel, pk/3
K90500-8 Empty Titrant Bottle

The following link provides additional information from the instruction manual or manufacturer's brochure. Click to open the PDF in a new window or right-click to download it:
Koehler K90500 / K90590 TAN-TBN Titrator or copy the following into your browser address window: labequip.com/stock/pictures/n907.pdf
Made in USA.
This item ships from Bohemia, NY.
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