K38500 Apparent Viscosity of Engine Oils

K38500 Apparent Viscosity of Engine Oils

K38500 Apparent Viscosity of Engine Oils

K38500 Apparent Viscosity of Engine Oils

K38500 Apparent Viscosity of Engine Oils
K38500 Apparent Viscosity of Engine Oils

TRANG CHỦ Sản phẩm Koehler Thiết bị kiểm tra độ nhớt động học và động lực học K38500 Apparent Viscosity of Engine Oils

Test Method
Determines the measurement of the Yield Stress, Apparent Viscosity and Borderline Pumping Temperature (BPT) of engine oils. Borderline pumping temperature is a measure of the lowest temperature at which an engine oil can be continuously and adequately supplied to the oil pump inlet of an automotive engine. Provides a correlation between the temperature at which the viscosity of engine oils reaches a critical value and the borderline pumping failure temperature in engines at the test method specified shear stress. 


K38500 Mini-Rotary Viscometer
• Testing capacity of up to 10 samples. 
• Microprocessor temperature controllers store all testing profiles in 
• 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. 
• New rotor design eliminates possible interference with water and ice. 
• Internal hermetic refrigeration system provides direct instant cooling. 
• Power-saver feature allows testing profile to resume in the event of a brief power interruption. 
• Internal gas system provides a continuous blanket of dry gas over 
samples to eliminate moisture buildup. 
• Rotor stator rack supplied for convenient cleaning, drying, and storage. 
• Safety features include high pressure cutout and high temperature limits. 
• Rotor stator sets included with instrument. Additional sets readily 
• Optional Software Package available




Conforms to the specifications of:
In accordance with the specifications of:
  ASTM D3829, D6821*, D6896
* With available Drive Line equipment sold separately
Cabinet Material: Stainless steel and durable thermoplastic
Temperature Range: +80°C to -40°C (176°F to -40°F)
Bath Design: Solid, direct cooling without liquids
Cooling Rate: Single Unit: 5.0°C per minute maximum
Refrigerant: R-507
Compressor Size: 1/3 Horsepower
Electrical Requirements: 
115V 50/60Hz, 15A
220V 50/60Hz, 7A
Temperature Control: +/- 0.1°C, digital readout
Heating Capacity: 600 Watts
Testing Capacity: 10 samples


Included Accessories
Removable Rotor/Stator Sets (10)
Rotor/Stator Holding Rack
Stator Removal Tool
Moisture Cover
Set of Weights & Strings
Air Filter Dryer and Desiccant


Dimensions lxwxh,in.(cm)
15.5x12.5x13.5 (39x32x34)
Net Weight: 105 lbs (47.6 kg)


Shipping Information
Shipping Weight: 143 lbs (64.86 kg)
Dimensions: 23 x 19 x 27 in (58.4 x 48.3 x 68.6 cm)





Ordering Information
Catalog Number
Product Description
K38500 Mini-Rotary Viscometer, 115V 50/60Hz
K38590 Mini-Rotary Viscometer, 220V 50/60Hz






Catalog Number
Product Description
Stator Insertion/Removal Tool (SIRT)
Moisture Cover

Rotor/Stator Set (1 Set)


Rotor/Stator Set (Set of 10)


Carriage Wheel Assembly


Stainless Steel Thumb Nut


Air Filter Dryer with Desicant


Rotor/Stator Holding Rack


MRV Weight Set – Standard


N105B Reference Oil (Pint)


MRV String Set (Qty 10)


MRV Driveline Rotor (for D6821)


MRV Weight Set – Driveline (for D6821)


Desiccant Media – 1 lb.