Ravenfield BS/C+ HTHS Tapered Plug Viscometer

ASTM D4741, ASTM D4683, CEC L36-A-90 and IP 370
For High Temperature, High Shear Viscosity of Engine Lubricants

The RavenfieldĀ® by CANNONĀ® HTHS BS/C+ Viscometer is a compact, high precision, tapered plug viscometer that measures the high temperature, high shear viscosity of engine lubricants and other oils according to ASTM D4741, CEC L-36-A-90 and IP 370 as specified by SAE J300 and ACEA. The HTHS BS/C+ Tapered Plug Viscometer also correlates to ASTM D4683 with no bias and is capable of testing across a wide range of temperatures and shear rates. Also available with an optional Model DR autosampler which permits the testing of up to 22 samples without operator intervention.

Common Applications

  • Engine lubricants
  • Pre-filtered used oils

Simple, automated operation and data analysis

  • Complies with SAE J300 and ACEA specifications. Meets ASTM D4741 and correlates to ASTM D4683 with no bias
  • Computer-controlled user interface guides the operator through calibration and testing
  • On-board viscosity calculator measures flow curve and computes results automatically
  • Optional Model DR autosampler (with built-in computer control) allows unattended testing of up to 22 samples
  • Simple sample introduction

Fast and precise measurements

  • Total test time <5 minutes per sample
  • Sample processing of >12 tests per hour
  • 1% to 2% repeatability (increments)

Versatile test options

  • Temperature range: 40°C to 180°C (adjustable in 0.1°C increments)
  • Variable speed motor permits simple shear rate adjustment across a wide range (from 100,000sec–1 to 2,000,000sec–1)
  • Customizable gap control

Compact, convenient design

  • No external utilities or high pressure gases are required
  • Instrument provides internal storage of measurement results and offers optional LIMS connectivity
  • Optional model DR autosampler features a built in printer for hard-copy documentation of test results and allows unattended testing of up to 22 samples

Dimensions (W × D × H) Without DR Autosampler: 62.2 cm × 38.1 cm × 64.8 cm (24.5 in × 15 in × 25.5 in)
With DR Autosampler: 83.3 cm × 41.9 cm × 64.8 cm (32.8 in × 16.5 in × 25.5 in)
Weight Without DR Autosampler: 30.0 kg (66 lb)
With DR Autosampler: 50.0 kg (110 lb)
Shipping dimensions (W × D × H) Without DR Autosampler: 81.0 cm × 92.0 cm × 64.8 cm (31.9 in × 36.2 in × 25.5 in)
With DR Autosampler: 122.0 cm × 92.0 cm × 64.8 cm (48 in × 36.2 in × 25.5 in)
Shipping weight (with all items) Without DR Autosampler: 50.0 kg (110.0 lb)
With DR Autosampler: 70.0 kg (154.2 lb)
Maximum thoughput > 12 tests per hour
Automated sample capacity 1 (without Model DR Autosampler);
22 (with Model DR Autosampler)
Viscosity range Up to 30mPa·s(cP) depending on temperature and shear rate
Temperature range and accuracy 40°C to 180°C
Accuracy at 150°C, ±0.02°C (viscosity range 1.5cP to 5.9cP) at 106sec-1 shear rate
Accuracy at 100°C, ±0.02°C (viscosity range 4.2cP to 18.9cP) at 106sec-1 shear rate
Shear rate range 100,000sec-1 to 2,000,000sec-1 depending on sample viscosity and temperature
Rotor height adjustment 0.002mm, position resolution ±0.01mm
Minimum sample/solvent volume 10mL sample/20mL solvent per test
Operating conditions 10% to 75% relative humidity, non-condensing, Installation Category II; Pollution Degree 2
Electrical specifications 100/115Vac, 50/60Hz; 230Vac, 50/60Hz; 120watts power consumption
Compliance CE Mark; EMC directive (89/336/EC); Low voltage directive (73/23/EC); HI-POT (1900 Vdc, 60 sec.)


The Ravenfield® by CANNON® BS/C+ HTHS Viscometer comes with an ultrasonic bath, vacuum pump assembly with constant-level pipe, platinum resistance thermometer (PRT), temperature controlled hot oil bath, 1 gallon of bath oil, one set of calibration oils, a one year warranty and professional installation/training. Additional charges may apply for installations outside the domestic U.S. Description Part #
100/115Vac, 50/60Hz 9728-C51
230Vac, 50/60Hz 9728-C52


Note: Part numbers are listed below for field installable options.
Model DR autosampler - permits the testing of up to 22 samples without operator intervention. Description Part #
100/115Vac, 50/60Hz 9728-C55
230Vac, 50/60Hz 9728-C54




Cleaner Ultrasonic 110V/115V


Silicone Fluid 20 cSt (1 Gallon)


Cleaner Ultrasonic 220V/230V


BOTTLE, 3oz, natural, polypropylene with Cap 43/485




RL 103 Viscosity Standard 1 L (Ravenfield Calibration Oil)




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