Kinematic Viscosity Bath

Kinematic Viscosity Bath

Conforms to ASTM D445 as well as ASTM D6074, D6158, IP 71, ISO 3104, DIN 51550, FTM 791-305, and NF T 60-100

  • Accommodates 7 capillary viscometers
  • Microprocessor temperature control between 20 and 100 °C (212 °F)
  • Dual digital displays show setpoint and actual bath temperature

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Constant temperature bath with advanced temperature control circuitry for convenient, accurate glass capillary viscometry determinations.

The kinematic viscosity of the base oil is determined utilizing ASTM D445. First, a test bath must be maintained within ±0.02°C for temperatures between 15°C and 100°C or within ±0.05°C otherwise. Furthermore, thermometers must be in the upright position and in the same position as when calibrated. A clean, dry, calibrated viscometer must be used under the condition that the flow time of the manual viscometers does not exceed 200 seconds. Once the test temperature is below the dew point, the viscometer must be filled then inserted into the test bath.

It is then possible to observe and record the flow times for viscosity calculation.

Microprocessor PID circuitry assures precise, reliable temperature control within ASTM specified stability and uniformity throughout the operating range of the bath.

Simple push-button controls and dual digital displays permit easy setting and monitoring of bath temperature. Baths accommodate seven glass capillary viscometers of various types. Viewing the viscometers is made easy by LED illumination inside the bath and a baffle that provides a background for easy viewing.

Temperature control uniformity is assured by means of an integrated stirrer and baffling system for uniform bath temperature distribution. Connection of the built-in cooling coil to tap water or a recirculating water chiller facilitates temperature control at ambient or below ambient temperatures.


  • Conforms to ASTM D445 and related specifications
  • Accommodates 7 capillary viscometers
  • Microprocessor temperature control between 20 and 100 °C (212 °F)
  • Stainless steel bath construction
  •  Dual digital displays show setpoint and actual bath temperature
  •  Selectable temperature scale - Fahrenheit or Celsius
  •  Integrated redundant overtemperature and low liquid level cut-off circuitry

Test Method:

Kinematic viscosity is of primary importance in the design and selection of a wide range of petroleum products.

Calibrated capillary viscometers are used to measure flow under gravity or vacuum at precisely controlled temperatures.

Electrical Requirements:

115V-240V 50/60Hz, Single Phase, 12A Max 


  • wxdxh, in. (cm) : 15.4x17.2x24.4 (39.12x43.69x61.68)

  • Net Weight :  72 lbs (32.66 kg)

Conforms to the specifications of:ASTM D445, D6074, D6158; IP 71; ISO 3104; DIN 51550; FTM 791-305; NF T 60-100
Temperature Control Range:20°C to 100°C (212°F)
Temperature Display Resolution: 0.01°C
Temperature Display Accuracy:± 0.01 °C
Bath Temperature Stability: ± 0.02 °C
Bath Temperature Uniformity: ± 0.02 °C
Thermometer Ports:2
Connectivity: USB
Drain Valve:1/2" female NPT fitting (back of unit)
Viscometer ports: Seven round 2" (51 mm) ports
Bath Medium: 10 cSt Silicone Oil