Two thin sensor plates in a tuning fork arrangement are driven with electromagnetic force to vibrate at their natural (resonant) frequency of 30 Hz within the sample fluid. Viscosity is then calculated based on the proportional relationship between the viscous resistance of the sample fluid and the amount of electric current required to drive and maintain the sensor plates at a constant vibration amplitude more ...
A Significant Breakthrough in Viscosity Measurement of Non-Newtonian Fluids What if you could evaluate the continuous behaviors of paints, creams, greases, polymers and many other kinds of non-Newtonian fluids more quickly, easily and precisely than you ever thought possible? With A&D’s tuning fork vibro method now capable of varying the shear rate, a whole new vista of materials research is wide open ahead of you—.
Vibration Amplitude Made Adjustable to Change the Shear Rate By simple key operation, the sensor plate amplitude of the RV-10000 can be altered to eight levels (between 0.07 and 1.2 mm peak-to-peak), which create different shear rates. With this function, you can easily measure viscosity changes in response to varying shear rates.
How the Tuning Fork Vibro Rheometer Works
Two thin sensor plates in a tuning fork arrangement are driven with electromagnetic force to vibrate at their natural (resonant) frequency of 30 Hz within the sample fluid. Viscosity is then calculated based on the proportional relationship between the viscous resistance of the sample fluid and the amount of electric current required to drive and maintain the sensor plates at a constant vibration amplitude.
The tuning fork vibro method is recognized as a Japanese industrial standard for viscosity measurement of liquids (JIS Z8803). The viscometer that uses this method is also accredited as a standard device for the Japan Calibration Service System (JCSS) along with capillary and rotational viscometers.
Easy Setup and Very Quick Measurement
Compared with conventional methods, it takes much less time for you to set the sample fluid, start measurement, and obtain the viscosity value (the RV-10000 requires only 20 seconds to stabilize). Moreover, since the sensor plates have a very small thermal capacity, they cause minimal temperature change to the sample fluid upon immersion, realizing fast and stable viscosity measurement
It is also very easy to clean the sensor after measurement – all you need to do is wipe off the sample residue with alcohol.*
*2 In the case of sample fluid sticking to the sensor, an off-the-shelf ultrasonic cleaner will be effective to remove it.
Simultaneous Measurements of Temperature and Viscosity
The temperature sensor (0 to 160 °C range) located between the two viscosity sensor plates allows measurement of viscosity’s dependence on temperature as accurately as possible.
Wide Dynamic Range of Measurements
Relationship Between Vibration Amplitude, Shear Rate and Viscosity Measurement Examples
The RV-10000 has a viscosity detection system that singly measures from very low to high viscosity in quick succession (max. 0.3 to 25,000 mPa.s), which makes the instrument highly versatile and able to cover measurement of various types of fluids by itself. It also allows continuous measurements of viscosity variation over time and/or temperature changes at differing shear rates
Extremely High Sensitivity
The sensor sensitivity heightened through sharp resonance phenomena even detects viscosities around the level of water with unparalleled precision. Such sensitivity realizes measurements, for example, for finding the cloud point of surfactants and controlling the drinking sensation of beverages.
The RV-10000 achieves repeatability as high as 1% of the measured value (by standard deviation) for the entire measurement range, providing you with consistent results and enabling reliable comparisons of those results
Relationship Between Vibration Amplitude, Shear Rate and Viscosity
Tuning fork vibro method (natural frequency at 30Hz)
0.07 to 1.2 mm (peak-to-peak at the tip of the sensor plate)
Viscosity measurement range
2,000 to 25,000 mPa.s
20 to 25,000 mPa.s
0.3 to 25,000 mPa.s
0.3 to 12,000 mPa.s
0.3 to 5,000 mPa.s
0.3 to 5,000 mPa.s
0.3 to 3,000 mPa.s
0.3 to 3,000 mPa.s
Repeatability *5 *6
1% of the measured value (standard deviation)
Accuracy *5 *7
±3% (1 to 1000 mPa.s) when the amplitude is set to 0.4 mm
Minimum display (mPa.s)
Minimum display (Pa.s)
0.3 to 10
10 to 100
100 to 1000
1000 to 25000
Viscosity measurement unit
mPa.s, Pa.s, cP, P
10 to 40°C (50 to 104°F)
Minimum sample amount
0 to 99°C/0.1°C (32 to 210.2°F/0.1°F); 100 to 160°C/1°C (212 to 320°F/1°F)
Temperature measurement accuracy
0 to 20°C: ±1°C (32 to 68°F: ±1.8°F)
20 to 30°C: ±0.5°C (68 to 86°F: ±0.9°F)
30 to 100°C: ±2°C (86 to 212°F: ±3.6°F)
100 to 160°C: ±4°C (212 to 320°F: ±7.2°F)
Vacuum Fluorescent Display (VFD)
Connection cable length
1.5 m (between the sensor unit and the display unit)
RS-232C as standard
Approx. 14 VA (including the AC adapter)
External dimensions / weight
Sensor unit: 112 (W) × 132 (D) × 291(H) mm / approx. 0.8 kg
Display unit: 238 (W) × 132 (D) × 170 (H) mm / approx. 1.3 kg
Stand unit: 296 (W) × 314 (D) × 536 (H) mm / approx. 4.6 kg
AC adapter × 1, connection cable × 1, sample cup (capacity: 45 ml) × 5, small sample cup (capacity: 10 ml) × 5,
small sample cup cover × 5, glass sample cup (capacity: 13 ml) × 2, glass sample cup holder × 1, water jacket × 1,
WinCT-Viscosity × 1, RS-232C cable × 1, serial/USB converter × 1, stand for securing the sensor unit × 1, X-Y-Z stage × 1,
positioning stopper × 1, anti-vibration table × 1
* 5 When the sample cup (45 ml) is used.
* 6 Repetitive measurement with the sensor plates remaining in the sample fluid.
* 7 The value after calibration using a viscosity standard liquid at a temperature range between 20°C and 30°C with no condensation.
* 8 The unit switches to Pa.s
Standard liquid for calibration JS2.5
500 ml, with certificate in accordance with JIS Z8809
Standard liquid for calibration JS5
Standard liquid for calibration JS10
Standard liquid for calibration JS20
Standard liquid for calibration JS50
Standard liquid for calibration JS100
Standard liquid for calibration JS200
Standard liquid for calibration JS500
Standard liquid for calibration JS1000
Standard liquid for calibration JS2000
Standard liquid for calibration JS14000/td>
Sample cup, 45 ml, polycarbonate × 10
Small sample cup, 10 ml, with cover, polycarbonate × 10
Glass sample cup, 13 ml × 1
Water jacket × 1, small sample cup with cover × 4
Storage container, 60 ml, glass × 10
Storage container, 120 ml, plastic × 20
Sample cup, 45 ml, polycarbonate × 5
Small sample cup, 10 ml, with cover, polycarbonate × 5
Glass sample cup, 13 ml × 2
Glass sample cup holder, stainless steel × 1
Water jacket × 1