Karl Fischer Moisture Analyzer

I. Product Introduction

The Karl Fischer Moisture Analyzer (volumetric titration method) is a precision analytical instrument based on the classic Karl Fischer reaction principle, specially used for the accurate determination of the moisture content of samples. Its volumetric model directly calculates the water content from the volume of titrant consumed, featuring efficient operation and accurate, reliable results.

II. Detection Principle

The Karl Fischer volumetric method is based on the quantitative reaction of I₂ and SO₂ with water. The instrument uses the dead-stop titration method to indicate the end point, monitoring the sudden change in current during titration through electrodes to precisely determine the reaction end point, thereby calculating the sample moisture content from the amount of Karl Fischer reagent consumed.

III. Applicable Standard

JJG 1154-2018 "Verification regulation for Karl Fischer volumetric moisture analyzers"

IV. Application Range

The instrument is widely used in the pharmaceutical, chemical, food and petroleum fields, and is key equipment for moisture detection in quality control and scientific research.

V. Features

1. Android system with a 7-inch color touch screen, integrated design.

2. Suitable for many sample types such as liquids, gases and soluble solids.

3. Two high-precision metering tubes of 10 mL and 20 mL are standard, with a minimum titration volume of 1 µL; users can manually replace them according to the moisture content of the sample, meeting a wide measurement range from macro to micro moisture.

4. The main unit and the automatic liquid-filling and draining system are designed separately; light-shielded titration tubing and corrosion-resistant materials (PTFE, fluororubber); a built-in pump system completes liquid suction, draining and cleaning with one key, fully sealed design, safe and environmentally friendly.

5. An anti-diffusion design effectively prevents reagent leakage from the titration head during standby, ensuring a stable measurement baseline and improving the accuracy of low-moisture sample determination.

6. Multiple result units: supports µg, mg, %, ppm, µg/L, mg/L, µg/g, mg/g and other units to meet the reporting requirements of different industries.

7. Compliant with FDA 21 CFR Part 11 and GLP specifications: with audit trail, multi-level authority management and data tamper-proofing functions to meet compliance requirements.

8. Very large data storage space; a built-in thermal printer prints test results in real time; supports exporting Excel and PDF reports via USB flash drive.

9. Wi-Fi cloud remote software upgrade; test data can be uploaded wirelessly and managed by client login.

VI. Technical Parameters

1. Moisture measurement range: 10 ppm to 100% (0.001% to 100% H₂O)

2. Recommended moisture range: 0.1%~100% (1000 ppm~100% H₂O)

3. Measurement resolution: 1 ppm (0.0001%) or 1 µg H₂O (result reading)

4. Polarization voltage: 30/50/100 mV (error ±1 mV)

5. Polarization current: 0~200 µA (error ±1.0% FS)

6. Repeatability (RSD): ≤1%

7. Burette system: Standard 10 mL and 20 mL dual metering tubes

8. Capacity error: ±10 µL/10 mL (10 mL tube), ±20 µL/10 mL (20 mL tube)

9. Minimum titration volume: 1 µL

10. Result units: µg, mg, %, ppm, µg/L, mg/L, µg/g, mg/g selectable

11. Power and environment: 12 V/3 A, power consumption ≤25 W (standby 10 W)

12. Working environment: Temperature 5~40 ℃, humidity ≤80% RH

13. Main unit dimensions: 310 mm × 226 mm × 233 (400) mm

14. Automatic liquid-filling system dimensions: 425 mm × 147 mm × 198 mm

15. Main unit weight: 3.7 kg

16. Automatic liquid-filling system weight: 3.4 kg