DFYF-108Z Fully Automatic Kinematic Viscosity Tester (2-Bath Holes, Temperature Accuracy ±0.01°C, ASTM D445 / GB/T 265)

DFYF-108Z Fully Automatic Kinematic Viscosity Tester (2-Bath Holes, Temperature Accuracy ±0.01°C, ASTM D445 / GB/T 265)

1. Customer Pain Point + Solution

Pain Point:

For quality control laboratories in petroleum products, lubricants, and fuel oils, kinematic viscosity is one of the most fundamental and critical test parameters. However, traditional viscosity testing presents numerous challenges — manual timing introduces significant errors, with results varying considerably between operators and even between runs by the same operator; cleaning is tedious, requiring manual disassembly and cleaning of viscometer tubes after each test, which is time-consuming and solvent-intensive; temperature control is unstable, as conventional baths suffer from temperature fluctuations that directly compromise viscosity data accuracy; and data management is inconvenient, with manual recording prone to errors and difficult to trace. These issues not only reduce laboratory efficiency but also seriously undermine result reliability. How can you achieve efficient, automated kinematic viscosity testing without compromising accuracy?

Our Solution:

The DFYF-108Z Fully Automatic Kinematic Viscosity Tester is designed and manufactured in strict accordance with ASTM D445, GB/T 265, and ISO 3104 standards. It features a 10-inch colour touch screen for intuitive operation. With a single press of the start button, the instrument automatically completes the entire test sequence: temperature stabilisation (with adjustable pre-heat time) → automatic sample lifting to the upper level → precise timing by infrared photoelectric sensor → automatic viscosity calculation → storage of up to 1000 data sets → result printing → automatic cleaning and hot-air drying. No manual intervention is required throughout the entire process — true "set and forget" fully automatic operation.

Customer Value:

You no longer need to tolerate inaccurate timing, tedious cleaning, or difficult data management in traditional viscosity testing. The DFYF-108Z provides a comprehensive solution with fully automatic temperature control, testing, calculation, cleaning, and drying — delivering industry-leading temperature accuracy of ±0.01°C and precise infrared photoelectric timing to ensure every data point is accurate and reliable.

2. Technical Parameters Table

3. Product Highlights

Temperature Accuracy ±0.01°C – Industry Leading
Using a Pt100 platinum resistance temperature sensor with a precision temperature control system, the DFYF-108Z achieves temperature accuracy of ±0.01°C — far surpassing the ±0.05~0.1°C typical of most competing products. For kinematic viscosity testing, temperature is the single most critical factor affecting results — even a 0.01°C fluctuation can impact viscosity data accuracy. The ±0.01°C accuracy ensures testing is conducted under strictly constant temperature conditions, delivering truly reliable data. The instrument also features over-temperature automatic power-off protection for safe operation.

10-inch Colour Touch Screen – Intuitive and Easy to Use
Unlike the small monochrome screens or physical push-buttons commonly found on competing products, the DFYF-108Z is equipped with a 10-inch colour LCD touch screen with a clear and intuitive interface. All parameter settings, test status monitoring, and data review can be performed directly on the touch screen, eliminating complex button operations — reducing training time and enabling quick operator proficiency.

One-Button Start – Fully Automatic Operation
With a single press of the start button, the instrument automatically completes the entire process: temperature stabilisation (with adjustable pre-heat time) → automatic sample lifting to the upper level → precise timing by infrared photoelectric sensor → automatic viscosity calculation → data storage → result printing → automatic cleaning and hot-air drying. No manual intervention is required throughout — true "set and forget" operation that frees up valuable laboratory personnel.

High-Precision Infrared Photoelectric Sensor – Accurate Timing
The instrument employs a high-precision infrared photoelectric sensor for liquid level detection and timing. Compared to ordinary optical sensors or manual stopwatches, timing accuracy is significantly improved. The sensor is unaffected by ambient light or liquid colour, ensuring consistent and accurate timing for every test.

Fully Automatic Cleaning and Hot-Air Drying – No More Tedious Manual Work
In traditional viscosity testing, cleaning the viscometer tube is the most time-consuming and tedious step. The DFYF-108Z automatically cleans and hot-air dries the viscometer tube after each test, eliminating the need for manual disassembly and cleaning. This protects operators from solvent exposure while significantly improving continuous testing efficiency. Users can customise the number of cleaning and drying cycles to suit different sample types.

Large-Capacity Data Storage – 1000 Sets with Automatic Averaging
The instrument stores up to 1000 sets of test data and supports customisable test cycles. Upon completion, the system automatically calculates and displays the average value — eliminating manual calculation errors. Data can be reviewed, printed, or exported at any time, meeting the traceability requirements of quality management systems such as ISO 17025.

Stainless Steel Construction + Energy-Saving Illumination – Durable with Clear Observation
Both the stirrer shaft and viscometer tube holder are made of stainless steel — corrosion-resistant, non-rusting, and suitable for long-term continuous use. The bath is equipped with an energy-saving lamp for clear illumination, making the viscometer tubes easy to observe at all times.

2-Hole Design – Compact and Efficient
Unlike the low-efficiency single-hole design or the bulky 4-hole design, the DFYF-108Z features a 2-hole per single bath configuration — delivering excellent test efficiency while minimising laboratory bench space usage. This is the ideal configuration for routine batch testing.

4. Application Scenarios

Scenario 1: Lubricant Manufacturer – Batch Quality Control
A major lubricant producer in East China uses the DFYF-108Z for kinematic viscosity testing of every finished product batch at both 40°C and 100°C. With one-button start, operators can load samples and walk away to attend to other tasks while the instrument automatically completes temperature stabilisation, testing, calculation, cleaning, and drying. The 1000-set data storage and automatic averaging function provide complete traceable quality data for every batch. The ±0.01°C temperature accuracy ensures test results closely match those from third-party laboratories, significantly reducing quality disputes.

Scenario 2: In-Service Oil Condition Monitoring – Equipment Failure Prediction
A large steel enterprise in North China uses the DFYF-108Z for regular kinematic viscosity monitoring of hydraulic oils and gear oils in service. By comparing viscosity changes between new and in-service oils, they detect oil degradation trends early and predict potential equipment failures. The fully automatic cleaning function enables the enterprise to complete continuous testing of large sample volumes in a short time, providing rapid response to equipment maintenance needs.

Scenario 3: Third-Party Testing Laboratory – High-Volume Commissioned Testing
A national-level oil testing centre in South China processes over 300 kinematic viscosity samples per month. The DFYF-108Z's fully automated process — automatic temperature control, testing, calculation, cleaning, and drying — significantly increases daily throughput while operators are freed from continuous monitoring. The infrared photoelectric sensor ensures timing precision and data authority for every test report. The 10-inch touch screen interface enables new operators to become proficient within 30 minutes, dramatically reducing training costs.

Scenario 4: Fuel and Chemical R&D Laboratory – Formulation Development
A specialty chemical company uses the DFYF-108Z to develop new low-viscosity synthetic base oils. The customisable test cycles and automatic averaging function allow R&D personnel to quickly obtain multiple replicate data sets, precisely evaluating the effect of different formulations on viscosity. The large-capacity data storage enables long-term tracking of formulation data across different development stages, accelerating the product development cycle.

5. Company Strength – Dalian Analytical Instrument Factory

We don't just sell instruments. We provide complete testing solutions with 48-hour technical support response and lifetime remote assistance.

6. Certification & Compliance

Standard Compliance: Fully conforms to ASTM D445, GB/T 265, and ISO 3104 standards

CE Marking: Available upon request (certificate number can be provided)

Calibration Certificate: Each unit comes with a factory calibration report traceable to national standards, using certified viscosity reference standards for full-range calibration

7. FAQ – Frequently Asked Questions

Q1: What is the relationship between ASTM D445 and GB/T 265?
A: ASTM D445 is the international standard for kinematic viscosity testing established by ASTM International. GB/T 265 is the Chinese national standard "Determination of Kinematic Viscosity of Petroleum Products and Calculation of Dynamic Viscosity" — the two are technically equivalent. The DFYF-108Z fully complies with both standards, making test results mutually recognised worldwide. ISO 3104 is the equivalent standard from the International Organization for Standardization.

Q2: How important is ±0.01°C temperature accuracy for kinematic viscosity testing?
A: Kinematic viscosity is highly temperature-sensitive — at around 40°C, a 0.1°C temperature change can cause a 0.5%–1% variation in viscosity values. The ±0.01°C accuracy means temperature fluctuation is only 1/5 to 1/10 of that in conventional instruments (±0.05~0.1°C), ensuring viscosity data accuracy and repeatability, making laboratory results highly consistent across different times and operators.

Q3: What are the advantages of the infrared photoelectric sensor over a manual stopwatch?
A: Manual stopwatch timing is affected by operator reaction time, with errors of 0.1–0.3 seconds between different operators. The infrared photoelectric sensor automatically detects the precise time as the liquid level passes the upper and lower刻度 marks, completing timing automatically without human influence — timing accuracy and consistency are far superior to manual operation.

Q4: How does the automatic cleaning work?
A: After each test, the instrument automatically draws cleaning solvent through the viscometer tube, then dries it with hot air. Users can customise the number of cleaning and drying cycles based on sample characteristics, ensuring complete cleaning for samples of different viscosities. The entire process requires no disassembly of the viscometer tube — protecting operators from solvent exposure while saving substantial time and labour.

Q5: Is the 2-hole design sufficient for daily testing needs?
A: Absolutely. The 2-hole design represents the optimal balance between testing efficiency and bench space — doubling the throughput of single-hole designs while being far more space-efficient than bulky 4-hole units. It is ideal for routine batch testing in most laboratories. For higher throughput, multiple units can be operated in parallel.

Q6: What is the practical value of 1000-set data storage?
A: It meets the original data retention and traceability requirements of quality management systems such as ISO 17025; supports batch quality trend analysis; enables rapid retrieval of historical data during audits; and eliminates the problems of lost paper records and difficult data retrieval.

Q7: What is your delivery time?
A: Standard delivery is 20–25 working days after order confirmation. For urgent needs, please contact us to check current stock.

Q8: What is your warranty policy?
A: 12 months from the date of shipment, excluding consumables (viscometer tubes, cleaning solvents, etc.). Lifetime technical support is included.

8. Test Method Overview – Building Trust Through Transparency

Per ASTM D445 / GB/T 265, here is exactly how the DFYF-108Z performs the kinematic viscosity test:

The entire process — from temperature stabilisation to cleaning and drying — is fully automated, requiring no manual intervention and ensuring consistent test conditions with accurate and reliable data.

Summary for Decision Makers

Contact Us

Dalian Analytical Instrument Factory
Carlos Zhang (Overseas Sales Manager)

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