ASTM D5481 High‑Temperature High‑Shear (HTHS) Lubricant Apparent Viscosity Tester

SH417 High‑Temperature High‑Shear Tester

The SH417 High‑Temperature High‑Shear Tester is designed and manufactured to meet the technical requirements of ASTM D5481. It adopts the multi‑capillary viscometer method to determine the apparent viscosity of lubricating oils.

This instrument is used to measure the apparent viscosity (HTHS value) of lubricants under high‑temperature and high‑shear conditions. It also complies with SH/T 0703‑2001 *Test Method for Apparent Viscosity of Lubricating Oils (Multi‑Capillary Viscometer)* for evaluating the high‑temperature high‑shear performance of lubricating oils.

**Test Principle**
At a controlled test temperature of 150 ℃ ±0.1 ℃, the sample is driven by nitrogen pressure (CO₂ optional) to flow through the capillary viscometer. Based on sample flow‑through time and pressure readings, the apparent shear rate of the capillary is calculated. Combined with the calibration curve of each viscometer cell and the measured pressure value, the apparent viscosity of the test oil can be obtained.

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> Product Aliases

- Automatic High‑Temperature High‑Shear Viscosity Tester
- High‑Temperature High‑Shear Dynamic Viscosity Tester
- ASTM D5481 High‑Temperature High‑Shear Tester
- ASTM D5481 HTHS Oil Apparent Viscosity Tester

Technical parameter

1. The instrument combines the advantages of all kinds of products at home and abroad, and makes a series of improvements in the appearance design and the use function of operating procedures, so that the instrument is more satisfied with the users

2. All the accessories of the instrument are imported original components and processing technology, which can be exchanged with imported instruments

3. The special high shear viscosity microcomputer software makes the test process of the instrument more simple, accurate and convenient

4. The measuring units of the instrument are calibrated with 4 kinds of American Kannen standard oil, and the experimental data are accurate and reliable

5, The instrument is equipped with special pressure reducing valve, convenient for users to connect the cylinder and operation.

6, Glass capillary can be completely replaced with the import, fully meet the ASTM and SH/T standard requirements, diameter 0.15mm, 15-18mm long

8, all aluminum material manufacture, neat and beautiful, small size

9, large touch type LCD screen can display all the test parameters, temperature, flow changes and other information directly

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