CMRV-5000 Self-Contained Mini-Rotary Viscometer

For Low Temperature Pumping Viscosity of Engine Oils
ASTM D4684, ASTM D3829, ASTM D6821*, ASTM D6896, SAE J300

The semi-automated CMRV-5000 is a compact and completely self-contained mini-rotary viscometer for measuring low temperature pumping viscosity from –5 °C to –40 °C. It comes with five removable test cells and offers integrated thermoelectric air-cooling.

Common Applications

  • Drive line lubricants
  • New engine oils
  • Used automotive oils

Reliable and accurate results

  • Meets requirements of ASTM D4684, ASTM D3829, ASTM D6821* and ASTM D6896
  • Meets latest SAE J300 specifications for low-temperature pumpability
  • Reliable and accurate temperature control from –5 °C to –40 °C
  • High resolution optical encoder for digital detection of yield stress and viscosity
  • Dry gas purge regulator maintains a frost-free environment throughout the precise, microprocessor-controlled cooling cycle

Compact, efficient design

  • Completely self-contained benchtop unit for measuring yield stress and viscosity for drive line lubricants and engine oils
  • Thermoelectrically air-cooled unit requires no external refrigeration or heat exchangers, eliminating the need for potentially hazardous refrigerants
  • Environmentally friendly (no freon gas), solid-state thermoelectric cooling removes temperature gradients to provide significantly enhanced precision and uniform temperature across all 5 test cells
  • High performance rotors with locking pins and carbon fiber shafts minimize test cell heat transfer
  • Five removable test cells allow for easy cleaning and sample handling

Fully automated testing

  • Windows®-based VISCPRO® software offers preconfigured profiles for each SAE-specified oil grade and referenced ASTM method as well as the option for custom cooling profile configuration
  • Software provides graphical representation of cooling profiles
  • Viscosity and yield stress are automatically calculated and stored or exported via built-in LIMS output
  • Optional multi-unit interface kit permits networking and control of up to four CMRV units from a single PC

* With optional drive line rotor kit

Dimensions (W × D × H) 28.4 cm × 39.6 cm × 61.7 cm (11.2 in × 15.6 in × 24.3 in)
Weight 23 kg (50 lb)
Shipping dimensions (W × D × H) 58.4 cm × 48.3 cm × 68.6 cm (23 in × 19 in × 27 in)
Shipping weight 29.5 kg (65 lb)
Maximum thoughput 5 samples per test cycle
Automated sample capacity 5
Temperature range and accuracy −5 °C to −40 °C, ± 0.1 °C
Minimum sample volume 10 mL per test
Operating conditions 15 °C to 30 °C, 10% to 75% relative humidity (non-condensing), Installation Category II; Pollution Degree 2
Electrical specifications 100/115 Vac, 50/60 Hz; 230 Vac, 50/60 Hz; 600 watts power consumption
Compliance CE Mark; EMC directive (2004/108/EC); Low voltage directive (2006/95/EC); HI-POT (1900 Vdc, 60 sec.); ROHS


Link to Downloads page for Software and Firmware 

CMRV-5000 Mini-Rotary Viscometer consists of the viscometer unit, five removable test cells, cell caps, N105B oil viscosity calibration standard, a high precision digital thermometer with probe, and data storage/management software. Computer sold separately. Description  Part #
100/115 Vac, 50/60 Hz 9728-R26
230 Vac, 50/60 Hz 9728-R27




Replacement rotor


Replacement cell (1 each)


Rotor collar/cell cap (set of 1 each)


High-performance drive line rotor kit (1)


Thread with loop and ring set (5 pc)


Spare parts kit CMRV-5000 (for one year)






Low Temperature Viscosity Standards (General, CCS and CMRV)

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