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Applicable standards

CE marking, WEEE Directive, Chinese RoHS

Measurement range

(based on combination with the cup specified below "Sample fluid capacity”)
No.3 rotor  0.3 dPa•s to 13 dPa•s (resolution: 0.1)
No.1 rotor 3 dPa•s to 150 dPa•s(resolution: 1)
No.2 rotor 100 dPa•s to 4000 dPa•s (resolution: 10)

Sample fluid capacity

No. 1 rotor

No. 2 rotor


Approx. 350 mL (with JIS 300 mL beaker)

No.3 rotor Approx. 150 mL (with No. 3 cup)
Clearance between rotor end and cup bottom: about 15 mm


Measurement accuracy and reproducibility

士10%士1 digit of indicated value



  • Calibrated according to JIS Z 8809:2011 standard liquids for calibrating viscometer
  • The rounding error resulting from resolution occurs

Rotor speed

62.5 rpm

Max. continuous measurement time per measurement


Display value hold function

Value at end of measurement is retained

Backlight function

Switchable backlight
Time until auto-off: 60 s
(when rotor is not operating and unit is powered from batteries)

Auto shutdown function (when an AC adapter is not used)

If rotor is not turning and no controls are operated for 5 minutes, power is automatically shut off

Resume function

Last selected rotor number setting is retained during power-off

Power requirements

Alkaline batteries LR6, Ni-MH rechargeable batteries, or AC adapter VA-05j
(5V to 7V : rated voltage 6V)

Current consumption

approx. 250 mA (at maximum torque)

Battery voltage check

Displaying battery status (4 steps)


175 mm (H)×77 mm(W)×45mm(D) (maximum)
175 mm (H)×77 mm (W)×40 mm (D)
(without protruding parts)


Approx. 260 g (without batteries)

Supplied accessories

No.1 rotor
(dia. 24 mm x 53 mm x 166 mm)
SUS304  1

No. 2 rotor
(dia. 15 mm x 1 mm x 113 mm)

SUS304 1
No. 3 rotor
(dia. 45 mm x 47 mm x 160 mm)
SUS304 1
No. 3 Cup
(dia. 52.6 mm x 75 mm)
SUS304 1
Rotor extension (in a tube)
(900 mm; 300 mm x 3)
SUS304 1
IEC LRG {size AA) battery 4
Instruction manual 1
Viscosity measurement guide 1
Inspection certificate 1


Optional accessory

AC adapter VA-05J
Stand VA-04

Rotor extension

  • The supplied foldable rotor extension consists of three 30 cm rods joined by rings. The combined length is 90 cm. When wishing to use the extension at a length of 30 cm or 60 cm, open the connector rings with a pair of pliers, remove the desired number of elements, and rejoin the extension rods. Be sure to close the rings fully again, to prevent the extension from getting detached during use.
  • Attach the end with the male thread to the viscotester and the end with the female thread to the rotor.
  • Note that both are left-hand (reverse) screw threads, so you must turn the parts counterclockwise to screw them in.
  • When measuring a fluid with high viscosity, the joint will look as shown in the illustration, but this does not affect the measurement.
  • The rotor extension rods are made of stainless steel.


Attaching the Rotor

Select a suitable rotor for the viscosity of the sample fluid, and screw the rotor into the rotor mounting shaft.
  • If you do not know the viscosity of the sample fluid, perform measurement using rotors in the following order: No. 2 rotor, No. 1 rotor, No. 3 rotor.
  • Because this is a left-hand (reverse) screw thread, you must turn the rotor counterclockwise to screw it in.
  • Verify that the blue rubber section of the rotor mounting shaft is mounted correctly and that does not touch the case of the unit. Otherwise correct measurement may not be possible.
  • To detach the rotor, hold the blue rubber section of the rotor mounting shaft with your fingers and turn the rotor clockwise.