Koehler K90500 / K90590 TAN-TBN-Mercaptan Sulphur Titrator

Condition: New Brand new item from stock or on order from manufacturer
Alternate Names:
total acid-base number titrator
Stock #:
Available In Stock (request a quote)
specify 110 or 220 Volts, 50/60 Hz, 40W
Product Description For determination of Total Acid Number (TAN), Total Base Number (TBN) and Mercaptan Sulphur of petroleum products, lubricants and transformer insulating oils.

K90500-18 Electrode for Argentimetric / Precipitation Titration - Silver Pin

This new model is a combination of the previous Koehler Volumetric karl fischer titrator and the previous potentiometric titrator.
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.
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 D664, D2896, D3227, D4739
Principle: Volume determination by equivalence point, end point or pH STAT.
Control: Microcontroller based
mV range: ± 3200 mV.
Accuracy: ± 0.1 mV (± 0.0016 pH).
Amplifier input impedance: > 10 ohms
Burette Resolution: 1/5000 for 5 ml, 1/10000 for 10 ml, 1/5000 for 25 ml.
Filling time: Less than 20 seconds
Keyboard: Alphanumeric splash waterproof polyester soft keys.
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
d) Photometric.
Cut-off criteria:
a) Volume
b) End point
c) mV/pH.
a) Acid base
b) Nonaqueous
c) Redox
d) Preciptiation
e) Complexometric
f) back titration
KF titration (Optional)
a) Molarity
b) % Assay(wt),
c) % volume (ml)
d) ppm
e) mg/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
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 Aqueous Titration
- 150mL Glass Beaker (3)


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