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High-Shear Viscometers

  • ASTM D 5481, ASTM D 4741, CEC L-36-A-90, IP370, SAE J300
  • Measures 15 to 20 Samples per Hour
  • One-Button Operation - Load Sample, Set Pressure, and Press “Start”
  • Reduced Role for Operator Enhances Repeatability and Reproducibility
  • Variable Temperature and Shear Rate for Research Applications

The CANNON® High-Temperature High-Shear Capillary Viscometer (HTHS Series II) is designed to determine the viscosity of engine oils and other oils under conditions of high shear at high temperatures. The HTHS is capable of testing at 1.4 x 106s–1 at 150°C and meets all precision specifications of ASTM D 5481 and SAE J300. The Series II design incorporates simple one-button operation — just load samples, set pressure, and press the Start button. The reduced operator role enhances repeatability and reproducibility. If desired, variable shear rates (± 30 percent of the shear rate specified in ASTM D 5481) may be obtained by altering the test pressure (variable from 75 to 500 psi). The viscosity range of 2-7 mPa·s can be extended to more than 20 mPa·s with custom configuration. Contact CANNON for more information.Oil samples are first introduced into the viscometric cells at the top of the HTHS. The oils then flow through small glass capillaries under pressure to achieve the desired shear rate. The five viscometric cells in the instrument may be operated in rapid succession. A digital stop-clock measures flow (efflux) time within 0.01 seconds. Flow times, temperature, and pressure are all displayed digitally. Data can then be analyzed with the computer software and test results displayed and printed.


The (HTHS Series II) viscometer is supplied with a digital temperature control system (variable from 30°C to 150°C), a digital pressure measuring system, automatic timer, and the High Shear Viscosity Calculator — a stand-alone software package for Windows® to perform HTHS data analysis and output.
Computer Specifications.

High Temperature Standards

Please refer to the table below for information on HT series oil standards for High-Temperature High-Shear Viscometer measurements at 150°C and 106s-1 shear rate.

Ravenfield “Tapered Plug” HTHS models now available

For additional information read the Ravenfield HTHS product flyer

  • 1-2 percent repeatability
  • Onboard viscosity calculator
  • Compatibility with DR Autosampler

The BS/C and BE/3 Tapered Plug high-temperature high-shear viscometers from Ravenfield provide high-temperature high-shear testing of engine lubricants according to ASTM D 4741, CEC L-36-A-90 and IP370 as specified by SAE J300 and ACEA. ASTM D 4741 is aligned with ASTM methods D 4683 (TBS) and D 5481. Model BS/C is designed to measure at temperatures from 40°C to 180°C and shear rates from 100,000 to 1,500,000 reciprocal seconds. This flexibility makes it a useful tool for many high-shear research applications. The BE/3 base model is also available for SAE J300 testing.

HTHS Specifications


521 mm wide x 387 mm deep x
686 mm high (20.5 x 15.25 x 27 in)


40.5 kg (89 lbs)

Shipping Weight:

75 kg (165 lbs)

Operating Conditions:

10%-90% RH non-condensing.
Installation category II; Pollution degree 2


CE Mark: EMC directive (89/336/EEC);
Low voltage directive (73/23/EEC);
HI-POT (1900 VDC, 60 sec.)


Computer not included. Please contact CANNON
for specifications.

HTHS Order Information

Catalog #

Item Description

Model HTHS Series II, 115 volts,
50/60 Hz, 500 watts
Model HTHS Series II-F, 230 volts,
50/60 Hz, 500 watts

Ravenfield “Tapered Plug”
HTHS Order Information

Catalog #

Item Description

Ravenfield HTHS BS/C+
Ravenfield DR Autosampler