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Pain Point:
For engine oil, gear oil, and other lubricant manufacturers, the actual viscosity performance under high temperature and high shear conditions directly determines fuel economy and wear protection. If HTHS viscosity is too low, the oil film strength is insufficient, leading to boundary lubrication failure in critical engine components (such as bearings and piston rings) under high-temperature conditions, accelerating wear and even causing catastrophic failure. If HTHS viscosity is too high, while oil film protection may be better, it increases fuel consumption and emissions. More critically, traditional viscometers can only test under ambient pressure, low temperature, or low shear conditions, failing to simulate the extreme conditions of 150°C and mega-shear rates found in engine bearings. How can you precisely control HTHS viscosity during formulation development and quality control?
Our Solution:
The DFYF-943 High Temperature High Shear Viscometer is designed and manufactured in accordance with ASTM D5481 and SH/T 0703 standards. It employs the multi-cell capillary viscometer method, using nitrogen pressure to drive the sample through a capillary viscometer at a precisely controlled temperature of 150°C ± 0.1°C, automatically calculating apparent viscosity from pressure changes and flow time. The instrument is equipped with 3 independent test units, each calibrated at the factory using 4 types of Cannon standard oils to ensure data accuracy and reliability.
Customer Value:
You no longer need to deliver products with "uncertain" HTHS viscosity. The DFYF-943 provides you with internationally compliant, traceable HTHS viscosity data—helping you optimize formulations to balance fuel economy and wear protection, ensuring every batch meets SAE J300 specifications, reducing customer complaints and warranty claims, and strengthening your reputation as a high-end lubricant supplier.
Parameter | Value | Why It Matters to You |
Power Supply | AC220V, 50Hz | Standard industrial power, plug-and-play |
Heating Power | 1500W | Rapid heating to 150°C test temperature, reducing waiting time |
Temperature Control Accuracy | 150°C ± 0.1°C | Ensures testing at precisely the standard-specified temperature—temperature deviation directly affects viscosity results |
Test Units | 3 units | Allows simultaneous or sequential testing of 3 samples, improving lab efficiency |
Pressure Gas Source | Nitrogen | Inert gas, non-reactive with oil samples, ensuring test safety and data purity |
Sample Volume | 7 ± 1 mL | Micro-sampling reduces testing costs |
Pressure Range | 350 kPa ~ 3500 kPa | Covers all pressure gradients required by the standard, suitable for oils of different viscosity ranges |
Pressure Control Accuracy | ±1% | Precise pressure control ensures stable shear rate and high data repeatability |
Repeatability | Arithmetic mean × 1.6% | High consistency across multiple tests on the same sample, trustworthy |
Reproducibility | Arithmetic mean × 5.4% | Data comparable across different laboratories, meeting ASTM precision requirements |
Weight | Approx. 30 kg | Benchtop design, easy to place and move in the laboratory |
Applicable Standards | ASTM D5481, SH/T 0703 | Internationally and domestically recognized standards, globally accepted |
7-inch LCD Touchscreen + Industrial PLC Control
The instrument features a 7-inch large LCD screen with intuitive touchscreen operation. The core control system uses an industrial-grade PLC, ensuring stable and reliable performance with strong anti-interference capability, suitable for long-duration continuous operation in laboratory environments.
High-Precision Intelligent Temperature Control
Temperature is controlled by a high-precision intelligent digital temperature controller, maintaining the bath at 150°C ± 0.1°C. This level of precision is critical for HTHS viscosity testing—±0.1°C ensures strict compliance with ASTM D5481 requirements, making data internationally comparable.
Imported Precision Pressure Sensors
The pressure measurement system uses imported precision pressure sensors for accurate and reliable data acquisition. Pressure control accuracy reaches ±1%, ensuring that the applied pressure is precise and repeatable, thus guaranteeing stable shear rates and reliable viscosity data.
Automated Testing Workflow
The test process is highly automated: after power-on, the instrument automatically heats to 150°C; using a dedicated threaded syringe, inject 7 mL of sample into the viscometer tube, lock the valve, and allow 15 minutes of temperature stabilization; after removing excess sample, press "Start" and the instrument automatically measures pressure changes, records time, and the internal computation program automatically displays and stores results. Minimal manual intervention reduces operator error.
4-Point Calibration with Cannon Standard Oils for Each Unit
Before delivery, each test unit is calibrated using 4 types of Cannon standard oils across the full measurement range. This ensures accurate data from low to high viscosity, fully meeting the precision requirements of ASTM D5481.
Professional Pressure Regulator + External USB Port
The instrument is equipped with a professional pressure regulator for easy connection to a nitrogen cylinder and precise pressure adjustment. An external USB port allows convenient data export for archiving, analysis, and report generation.
Compact Benchtop Design
The benchtop design is compact and reasonably laid out, saving valuable lab bench space and suitable for all types of oil analysis laboratories.
Scenario 1: Engine Oil Manufacturer – Formulation Development & Quality Control
An international lubricant brand's advanced engine oil R&D center in China uses the DFYF-943 for HTHS viscosity testing of their new 0W-20 full synthetic engine oil. By precisely measuring HTHS viscosity at 150°C for different additive formulations, the R&D team found the optimal balance between fuel economy (lower HTHS) and wear protection (higher HTHS). The final product successfully obtained API SP and ILSAC GF-6 certifications, with HTHS viscosity fully meeting SAE J300 requirements.
Scenario 2: Third-Party Testing Laboratory – High-Volume Commissioned Testing
A national-level oil testing center in East China receives over 150 engine oil samples per month for HTHS viscosity testing. The DFYF-943's 3 independent test units allow the lab to process multiple samples simultaneously, and with the automated workflow, daily throughput increased by 200%. The imported pressure sensors and 4-point calibration system ensure authoritative data for every test report, earning high recognition from clients.
Scenario 3: Gear Oil & Transmission Fluid Producer – Product Upgrade Verification
A European transmission fluid manufacturer planned to upgrade its product line to meet more stringent OEM specifications. Using the DFYF-943, they tested multiple competitors' and their own formulations at 150°C under high shear. The precise HTHS viscosity data identified performance gaps in their formulation. The optimized product, based on these test results, successfully obtained OEM approval from a prestigious German automotive manufacturer.
Category | Details |
Established | Since 1978 – over 45 years of experience in petroleum testing instruments |
Facility Size | 8,000+ m² modern production base in Dalian High-Tech Zone |
R&D Team | 15+ senior engineers specializing in oil analysis equipment |
Annual Capacity | 500+ units of various petroleum testing instruments |
Certifications | ISO 9001:2015 certified; products meet ASTM, ISO, GB/T, SH/T standards |
Export Markets | Southeast Asia, Middle East, Europe, South America, Africa |
Key Clients | National petrochemical labs, third-party testing centers, university research labs, lubricant manufacturers |
We don't just sell instruments. We provide complete testing solutions with 48-hour technical support response and lifetime remote assistance.
Standard Compliance: Fully conforms to ASTM D5481 and SH/T 0703
CE Marking: Available upon request (certificate number can be provided)
Calibration Certificate: Each unit comes with a calibration report using 4 types of Cannon standard oils, traceable to international standards
Q1: What is the relationship between ASTM D5481 and SH/T 0703?
A: ASTM D5481 is the internationally recognized standard for HTHS viscosity testing, while SH/T 0703 is the Chinese petrochemical industry standard, technically equivalent to ASTM D5481. The DFYF-943 fully complies with both standards, meeting the testing requirements of both domestic and international customers.
Q2: Why is HTHS viscosity so important for engine oils?
A: HTHS viscosity directly reflects the actual lubricating capability of engine oil under high-temperature, high-shear conditions. If HTHS is too low, the oil film cannot adequately protect critical components such as bearings and piston rings; if too high, it increases internal friction in the engine, leading to higher fuel consumption. SAE J300 specifies minimum HTHS viscosity requirements for different viscosity grades.
Q3: Why is the test temperature 150°C?
A: 150°C represents the actual operating temperature in modern engine bearings. HTHS viscosity measured at 150°C and mega-shear rates most closely correlates with actual lubricant performance in real engines.
Q4: Can the 3 test units run simultaneously?
A: The DFYF-943 is equipped with 3 independent test units. Each unit can be operated independently, allowing you to load different samples in different units and run them sequentially or separately, significantly improving laboratory efficiency.
Q5: What is "4-point calibration with Cannon standard oils"?
A: Cannon is a globally recognized brand of viscosity standard oils. Before delivery, each test unit is calibrated across the full measurement range using 4 different viscosity Cannon standard oils, ensuring accurate data from low to high viscosity throughout the entire range.
Q6: 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.
Q7: Do you provide installation and training?
A: Yes. We provide an English user manual and installation video. Remote technical support is available 24/7 via WhatsApp, WeChat, or email. On-site training can be arranged for bulk orders.
Q8: What is your warranty policy?
A: 12 months from the date of shipment, excluding consumables (viscometer tubes, seals, etc.). Lifetime technical support is included.
Per ASTM D5481 / SH/T 0703, here is exactly how the DFYF-943 performs the test:
Step | Action | Details |
1 | Power on & heat-up | Turn on power; instrument automatically heats to 150°C and stabilizes |
2 | Inject sample | Use a dedicated threaded syringe to inject 7 mL of sample into the viscometer tube from the top |
3 | Seal & stabilize | Lock the valve; allow sample to stabilize at 150°C for 15 minutes |
4 | Adjust sample volume | Remove excess sample to ensure the volume precisely meets standard requirements |
5 | Start test | Press the "Start" button on the screen; the instrument automatically applies the set pressure |
6 | Data acquisition | The imported pressure sensor monitors pressure changes in real time; the system automatically records time |
7 | Result calculation | The internal computation program automatically calculates and displays HTHS viscosity from the pressure-time curve |
8 | Data storage | Results are automatically saved to internal memory and can be exported via USB |
If the system detects that the pressure value does not match the current sample, it will automatically recommend an appropriate pressure value, ensuring each test is performed under optimal conditions for accurate data.
You Need | DFYF-943 Delivers |
Standard compliance | ASTM D5481, SH/T 0703 |
Test precision | 150°C ± 0.1°C temperature control, ±1% pressure control accuracy |
Data reliability | Imported pressure sensors + 4-point standard oil calibration for each unit |
Testing efficiency | 3 independent test units, automated workflow |
Operational convenience | 7-inch touchscreen, one-click test, automatic calculation |
Data management | Internal storage + USB export |
After-sales support | 12-month warranty + lifetime remote support |
Trust | Factory direct since 1978, ISO 9001 certified |
Dalian Analytical Instrument Factory
Carlos Zhang (Overseas Sales Manager)
�� Tel / WhatsApp / WeChat: +86 18740265556
�� Email: 54639288@qq.com
�� Address: 1-1, No.107 Guangxian Road, High-Tech Zone, Dalian, Liaoning, China (Zip code: 116023)
