The SF-3 Karl Fischer Coulombic Moisture Analyzer uses the Karl Fischer Coulombic method to determine trace amounts of moisture in different substances, which is a more reliable method. The SF-3 Karl Fischer Coulomb moisture analyzer has successfully applied this method, using advanced automatic control circuits and a novel external structure, making the instrument more reliable and convenient to use. It has the characteristics of fast analysis speed, simple operation, high accuracy, and strong automation. Widely used in sectors such as petroleum, chemical, power, railway, pesticide, medicine, and environmental protection.

Technical parameters of SF-3 Karl Fischer Coulomb moisture analyzer and Karl Fischer moisture analyzer:

Measurement method: Karl Fischer Coulomb method (electric quantity method)

Display: 4-digit LED digital display

Read unit: μ gH2

Electrolytic current control: 0~300mA automatic control

Measurement range: 3 μ g~100mg H2O (3ppm~99%)

Sensitivity threshold: 1 μ g H2O

Accuracy: Excluding injection error of 3 μ g~1mgH2O, the error is not greater than ± 3 μ g;

The error of 1mgH2O or above shall not exceed ± 0.3%

Power supply: 220V ± 10%, 50Hz

Power: not exceeding 40VA

Environmental temperature: 5-40 ℃

Environmental humidity: ≤ 85%

Dimensions: Host: 320 × 260 × 146mm

Weight: Approximately 7.5kg

Working principle of SF-3 Karl Fischer titration moisture meter:
The Karl Fischer reagent of Jingtai Trace Moisture Analyzer is composed of a mixture of dominant iodine and substances such as arsenic and methanol filled with sulfur dioxide. Inject the sample into the electrolytic cell, and the water in the sample reacts with Karl Fischer reagent. The reaction equation between Karl Fischer reagent and water is:
I2+SO2+3C5H5N+H2O—→2C5H5N•HI+C5H5N•SO3…………… ①
C5H5N•SO3+CH3OH—→C5H5N•HSO4CH3 ………………… ②
From equation ①, it can be seen that the number of moles of iodine participating in the reaction is equal to the number of moles of water. We can detect the consumption of iodine by measuring the electrode, and then the instrument generates the same amount of iodine on the electrolytic electrode by electrolyzing iodine ions. The generated iodine, according to Faraday's law, is directly proportional to the amount of charge. The reaction equation is as follows:
2I¯+2e—→I2………………………………………………… ③
OurMicro moisture analyzerThe mass of water in the sample can be calculated based on the amount of electricity required to electrolyze the corresponding iodine, and displayed on a digital monitor. The micro moisture analyzer adopts an electrolytic current automatic control system, and the magnitude of the electrolytic current can be automatically controlled according to the moisture content in the sample, with a maximum of 300mA. During the electrolysis process, the moisture gradually decreases, and the electrolysis speed decreases proportionally until the end of the experiment. This system ensures high precision, high sensitivity threshold, and high speed during the analysis process. In addition, during the measurement process, it is inevitable to introduce some interfering factors, such as moisture invading from the air, which can generate blank current. And our trace moisture analyzer has the function of storing blank current, which can eliminate the influence of blank current on the experiment, so the value on the display is the true water content in the tested sample.

The SF-3 Karl Fischer Moisture Analyzer [Trace Moisture Analyzer] meets the following standards:

1. GB/T7600 "Determination of Moisture Content in Operating Transformer Oil (Coulombic Method)

2. GB6283 "Determination of Moisture Content in Chemical Products - Karl Fischer Method (General Method)"

3. SH/T0246 "Determination of Water Content in Light Petroleum Products (Electricity Method)

4. SH/T0255 "Method for determination of moisture content in additives and lubricating oils containing additives (electric method)"

5. GB/T11133 "Determination of Water Content in Liquid Petroleum Products (Karl Fischer Method)"

6. GB/T7380 "Determination of Moisture Content of Surfactants (Karl Fischer Method)"

7. GB10670 "Determination of Trace Moisture in Fluoromethane for Industrial Use by Karl Fischer Method"

8. GB/T606 Chemical reagents General method for determination of moisture Karl Fischer method

9. GB/T8350 "Denaturated Fuel Ethanol"

10. GB/T8351 "Ethanol gasoline for vehicles"

11. GB/T3776.1 "Method for determination of moisture content of pesticide emulsifiers"

12. GB/T6023 Determination of Trace Moisture in Industrial Butadiene by Karl Fischer Coulombic Method

13. GB/T3727 Determination of Trace Water in Ethylene and Propylene for Industrial Use

14. GB/T7376 Determination of Trace Moisture in Fluorinated Alkanes for Industrial Use

15. GB/T18619.1 Determination of water content in natural gas Karl Fischer Coulomb method

16. GB/T512 "Method for determination of moisture content in lubricating grease"

17. GB/T1600- Method for determination of moisture content in pesticides

18. GB/T11146 Determination of Water Content in Crude Oil (Karl Fischer Coulombic Method)

19. GB/T12717 "Test Methods for Acetic Esters for Industrial Use"

20. GB/T5074 Determination of moisture content in coking products

21. GB/T18826 Industrial 1,1,2-tetrafluoroethane (HFC-134a)

22. Compliant The technical requirements for determining the moisture content in drugs using the Karl Fischer method in pharmacopoeia.