– High Precision, Fast Response, Intelligent Analysis for Trace Moisture Detection
In the petroleum, chemical, power generation, pharmaceutical, and new energy industries, trace moisture content is a key parameter affecting product quality, reaction efficiency, and equipment safety. The DFYF-190 Automatic Trace Moisture Tester adopts the classic Karl Fischer Coulometric Method (microprocessor-controlled electrolysis) and is suitable for precise determination of trace moisture in liquid, gas, and some solid samples – making it an ideal choice for trace moisture analysis in laboratories and industrial settings.
1. Standard Compliance and Applicable Samples
The DFYF-190 complies with the following international and industry standards (partial list):
Standard | Application |
GB/T 6283-2008 | Determination of moisture in chemical products |
ASTM E1064-2008 | Karl Fischer coulometric method for organic liquids |
GB/T 7600-1987 | Determination of moisture in transformer oil |
ASTM D4928-00(2010) | Determination of moisture in crude oil |
ASTM D6304-2007 | Determination of moisture in petroleum products |
ISO 10337-1997 | Determination of water in crude oil (coulometric method) |
SH/T 0246-1992 | Determination of moisture in light petroleum products |
SH/T 0255-1992 | Determination of moisture in petroleum additives |
Applicable sample types:
Gasoline, diesel, kerosene, lubricating oils
Transformer oils, turbine oils
Crude oil, naphtha, solvent oils
Chemical raw materials, gas samples (LPG, natural gas)
Pharmaceutical and new energy materials
2. Key Technical Specifications
Parameter | Specification |
Power Supply | AC220V, 50Hz |
Measurement Method | Microprocessor-controlled electrolysis (Karl Fischer Coulometric Method) |
Electrolysis Rate | 2.4 mg H₂O/min |
Electrolysis Current | 0 ~ 430 mA (automatic control) |
Display Measurement Range | 0.01 μg ~ 200 mg H₂O |
Water Content Range | 0.0001% (1 ppm) ~ 100% |
Sensitivity | 0.01 μg H₂O |
Drift Compensation | Microprocessor automatic control |
Data Storage | 1,000 records |
Power Consumption | < 40W |
Dimensions | 360 × 310 × 135 mm |
Weight | Approx. 6 kg |
3. Performance Features
3.1 Multi-Standard Compatibility – One Instrument for Multiple Applications
The instrument complies with GB/T, ASTM, ISO, SH/T and over 17 other domestic and international standards, covering trace moisture detection needs across petroleum, chemical, power, gas, and other industries – eliminating the need for multiple instruments for different standards.
3.2 6-Inch Touch Screen + Composite Control System
Equipped with a 6-inch touch LCD screen featuring a clear display and intuitive operation. The built-in microcontroller and computer composite control system enables intelligent analysis and determination with a high degree of automation.
3.3 Patented Design – Corrosion-Resistant and Easy to Clean
The instrument features a patented design with an electrostatic spray-coated surface – corrosion-resistant, easy to clean, and suitable for long-term use in both laboratory and industrial environments.
3.4 Automatic Blank Current Compensation – Fast Equilibrium
The microprocessor automatically controls blank current compensation, allowing the reagent to quickly reach equilibrium – reducing wait time and improving testing efficiency.
3.5 High Electrolysis Current – High Sensitivity and Fast Analysis
With an electrolysis current range of 0 ~ 430 mA and an electrolysis rate of 2.4 mg H₂O/min, the instrument achieves a sensitivity of 0.01 μg H₂O – capable of capturing extremely low moisture changes with fast analysis speed.
3.6 Powerful Data Storage and Processing Functions
Automatically stores up to 1,000 test results
View historical records at any time
Automatically calculates the average value of multiple measurements
Automatically calculates and prints: μg / ppm / percentage / mg/L / sample name / test date and more
4. Comparison with Traditional Moisture Testers
Feature | Traditional Volumetric Moisture Tester | DFYF-190 Coulometric Tester |
Detection limit | Relatively high (approx. 0.1%) | 0.01 μg H₂O (ppm level) |
Electrolysis current | Fixed or low | 0 ~ 430 mA automatic control |
Equilibrium time | Long | Automatic blank current compensation – fast equilibrium |
Data storage | None or limited | 1,000 records, searchable |
Display type | LED digital | 6-inch touch screen |
Standard compliance | Single or few | 17+ international/domestic standards |
Print content | Single value | Multiple units + sample information, automatic printing |
Appearance & protection | Ordinary paint | Patented design + electrostatic spray coating – corrosion-resistant |
5. Typical Applications
Refinery quality control laboratories – Trace moisture detection in gasoline, diesel, kerosene, lubricating oils, and more
Power utilities – Moisture monitoring in transformer oils and turbine oils to prevent insulation degradation
Chemical enterprises – Moisture control in organic solvents and chemical raw materials
Natural gas / LPG testing – Trace moisture determination in gas samples
Third-party testing agencies – Standard moisture analysis of batch samples
Pharmaceutical and new energy materials – Moisture control in high-purity materials
6. Service and Support
We provide full technical support – from installation and commissioning to operator training and after-sales maintenance. The DFYF-190, with its high sensitivity, fast analysis, and intelligent operation, is an efficient tool for your trace moisture detection needs.
About Us
With nearly 40 years of specialized experience, Dalian Analysis Instrument Factory is a leading manufacturer of petroleum product testing instruments. We are ISO 9001 (2000) certified, ensuring reliable quality assurance in design, production, and after-sales service.
Our product line covers more than 100 varieties, including analyzers for gasoline, kerosene, diesel, lubricating oils, greases, and general laboratory equipment.
Contact Us
For standard models or customized solutions – we are here to help you improve your trace moisture testing capabilities.
Sales Email: [lovecarlos2000@gmail.com]
24-Hour Hotline: +86 15941156556
