Koehler Instrument K90500
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Koehler Automatic Potentiometric Titrator
Koehler K90500 / Link Gulf K90500
The Automatic Titrator is provided with two-point auto-calibration and standardization (zero offset). The instrument is capable of displaying the 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 a high-speed vortex stirrer with a digital speed indication. This specially designed stirrer provides excellent homogenous mixing of samples. An optional magnetic stirrer is also available.
Test Method
For determination of Total Acid Number (TAN), Total Base Number (TBN), Mercaptan Sulfur and Karl Fischer Water Content of petroleum products, lubricants and transformer insulating oils. Titration is the fundamental chemical analysis procedure whereby the concentration of a chemical substance in a 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 the reaction by measuring the potential difference between two electrodes. Automatic Titration increases accuracy, repeatability and reproducibility as well as minimises errors in calculation and documentation.
Features
| Catalog Number | Description | Voltage |
| K90500 * | Koehler Automatic Potentiometric Titrator | 115V, 60Hz |
| K90590 | Automatic Potentiometric Titrator | 230V, 50Hz |
| 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 backlighted liquid crystal display (LCD). |
| Titration Head: | Manual stand with swivelling arm. |
| Stirrer System: | Microcontroller-based variable speed, high torque vortex stirrer with digital indication. (Magnetic Stirrer optional) |
| Sensors: | 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) Endpoint c) mV/pH |
| Methods: | Titrations: a) Acid-base b) Nonaqueous c) Redox d) Precipitation 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 |
| Input/Output Peripheral Interface: | (a) Parallel Port: 1 – for printer (b) Serial Port: 2 – for Balance & PC |
| Electrical Requirements: | 115V, 60Hz 230V, 50Hz |
| Shipping Information: | wxdxh,in.(cm): 12x16x16(30.48×40.64×40.64) System Weight: 9 Kg (19.84 lbs) |
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