MRV TP-1 | King Mini-Rotary Viscometer

MRV Temperature Profile 1

The King Mini-Rotary Viscometer determines borderline pumping temperatures and yield stress determinations of oils and lubricants without the use of chiller baths or thermoelectric cooling.  Measures a broad temperature range of + 80°C to – 40°C (176°F to – 40°F) and incorporates patented direct refrigeration technology for better temperature control and precision.

ASTM D3829
ASTM D4684
ASTM D6821
ASTM D6896


  • MRV Software Package (with laptop) available
  • 10 sample testing capacity
  • Small bench-top footprint
  • Microprocessor temperature controllers store MRV/TP1 testing profiles in memory.
  • Unique design is fully self-contained – no external refrigeration or heating apparatus needed.
  • Advanced direct refrigeration technology eliminates the need for liquid cooling mediums such as methanol
  • Removable test cells allow for easy cleaning, sample agitation and advance sample preparation.
  • Self-contained pre-heating system to 80°C to remove oil memory prior to testing.
  • Rotor/stator rack supplied for convenient cleaning, drying and storage.

Dimensions (W x D x H): Benchtop: 46 x 46 x 40 cm (18 x 18 x 16 inches)
Weight: ~43 kg | (94 lbs.)
Voltage: 208-220 VAC, 7 Amp.
Frequency: 50/60 Hz.
Heating Capacity: 600 Watts
Temp. Range: 80°C to -40°C (176°F to -40°F)
Temp. Control: ±0.1°C across all test cells | Digital readout
Cooling Rate: 5.0°C per minute maximum
Refrigerant: R-507
Compressor Size: 1/3 Horsepower
Testing Capacity: 10 samples (customizable 5 to 10)
Cabinet Material: Stainless steel and durable thermoplastic
Bath Design: Solid, direct refrigeration without liquids
Safety: High Pressure cutout, High Temperature limit, CE Marked
Shipping Weight: ~122 – 136 kg | (270 – 300 lbs.)
Shipping Dimensions (W x D x H): 97 x 84 x 61 cm (38 x 33 x 24 inches)

350501: King MRV Software Package (w/Laptop)
350222: MRV Rotor/Stator Set
350127: Stator Insertion & Removal Tool (S.I.R.T.)
350128: Moisture Cover
950508: Stainless Steel Thumb Nut
170028: Test Cell Holding Rack
350129: MRV Weight – 10 gram
350153: MRV Weight – 150 gram
350417: MRV String
350190: Desiccant Assembly
550175: Desiccant Media (1 lb. | 0.45 kg)
350232: MRV Driveline Rotor (for ASTM D6821)
350223: MRV Weight Set – Driveline (for ASTM D6821)
020019: N105B Reference Oil (Pint | 0.47 L)

The Automated Pulley Wheel utilizes a LED light sensor for precise measurements.

The MRV Automation Software Package offers simple user prompts to facilitate the calculation of yield stress, viscosity, and rotor/stator cell constants.