HF-TC-638 Oil Moisture Analyzer

The Oil Moisture Analyzer determines water content inside transformer oil and other insulating oil. It monitors oil quality variation, evaluates insulation performance and avoids equipment faults caused by excessive moisture in power facilities.

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This newly developed trace moisture analyzer adopts a high-resolution color touch LCD display for convenient, intuitive and easy operation. Controlled by a high-performance ARM processor featuring large data storage, fast operation and strong anti-interference capacity, it delivers rapid testing and high accuracy.
It supports self-diagnosis, dynamic potential curve display, automatic result display and printing. It can store up to 1000 test records and supports delayed measurement, which works well for samples with low moisture content. It is equipped with sliding touch stirring speed control. Multiple algorithms with volume, weight and other key parameters are available for moisture calculation. Users can adjust formula parameters during testing without interfering with ongoing measurement.
HF-TC-638 Oil Trace Moisture Analyzer applies the Karl Fischer Coulomb Titration method to reliably determine trace moisture in liquid, gas and solid samples. For solids insoluble in reagents or substances liable to contaminate electrodes and reagents, corresponding samplers can be matched for indirect measurement. It is a high-efficiency automatic analyzer widely used in power, petroleum, chemical, pharmaceutical, railway, environmental protection and scientific research fields.
Aliases: Trace Moisture Tester, Automatic Trace Moisture Analyzer, Karl Fischer Moisture Titrator, Coulomb Karl Fischer Moisture Analyzer

Technical Parameters

Item Specification
Titration Method Coulomb titration (coulometric analysis)
Measuring Range 1μg ~ 100mg (typical:10μg ~ 100μg)
Electrolysis Current 0–400mA
Sensitivity 0.1μg
Accuracy 5μg H₂O ~1mg H₂O: ±2μg;
Above 1mg H₂O: ±0.3% (excluding sampling and ambient humidity error)
Sample Type Solid, liquid, gas
Display 64-color high-definition touch display
Data Storage 1000 test records
Status Indication Dynamic curve & text display
Stirring Speed Control Sliding touch panel speed regulation
Printer Mini thermal printer, 56mm paper width
Power Supply AC220V±10V, 50Hz±2.5Hz
Power Rating 50VA
Ambient Temperature 5 ~ 35℃
Relative Humidity ≤85%
Overall Dimension 330mm × 260mm × 220mm (L×W×H)

Product Features

  1. Equipped with high-performance ARM processor with large storage capacity, fast response and strong anti-interference, featuring fast detection and high precision.
  2. Built-in self-diagnosis function; test results can be displayed and printed after measurement. Dynamic potential curve makes test status intuitive.
  3. Large storage capacity, saving up to 1000 test records.
  4. Delay measurement function, highly effective for samples with low moisture content.
  5. Sliding touch control for stirring speed adjustment.
  6. Multiple algorithms integrating volume, weight and other parameters for moisture calculation.
  7. Calculation parameters can be modified during testing without affecting ongoing measurement; moisture content will be recalculated according to updated parameters for convenient operation.

FAQ for Oil Moisture Analyzer

Q1: What principle does this Oil Moisture Analyzer adopt?

A: It uses Karl Fischer coulometric titration principle to measure trace moisture content in liquid, solid and gas samples.

Q2: What is the measuring range of the instrument?

A: Measuring range: 1μg ~ 100mg, typical testing range 10μg ~ 100μg, sensitivity reaches 0.1μg.

Q3: What samples can be tested?

A: It supports liquid, solid and gaseous samples, widely used for transformer oil and other insulating oil moisture detection in power industry.

Q4: Can the instrument store test data?

A: Yes. It can save up to 1000 groups of test records, equipped with dynamic curve display for real-time monitoring.

Q5: Does the machine support printing test results?

A: It has a built-in mini thermal printer with 56mm paper width to output test reports automatically.

Q6: What is the function of delayed measurement?

A: The delayed measurement function is especially effective for samples with low water content to improve testing stability.

Q7: What power supply does the analyzer require?

A: Power supply: AC220V±10V, 50Hz±2.5Hz, rated power 50VA.

Q8: What are the environmental requirements during operation?

A: Ambient temperature: 5 ~ 35℃, relative humidity ≤85%. Avoid severe humidity and strong vibration.

Q9: What does excessive moisture in transformer oil mean?

A: High moisture will reduce oil insulation performance, accelerate insulation paper aging and may cause partial discharge or insulation breakdown inside transformers.

Q10: Can parameters be modified during the testing process?

A: Yes. Users can adjust calculation parameters without interrupting ongoing tests; moisture value will be recalculated with new parameters.

Q11: How to handle solid samples that easily contaminate electrodes?

A: Use matched dedicated samplers to implement indirect measurement and avoid polluting the titration cell.

Q12: How to maintain the equipment after testing?

A: Replace Karl Fischer reagent regularly, clean the electrolytic cell and electrodes, and keep the instrument dry to prevent moisture interference.

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