1. Viscosity:Newton’s law
y
A F
F dv
=η
A dy
v=0
Velocity gradient
x
z
Advanced Electronic Ceramics I (2004)
Cylinder-type Viscometer
The ViscoTester 550 is a rotational viscometer for
sophisticated and automized quality control giving
absolute viscosity data at defined shear rates and
accurate temperature control. It is suitable for the
complete characterization of Newtonian and non-
Newtonian fluids including the measurement of yield
points or thixotropy.
Specifications:
Viscosity range (mPas) 1 - 1 000 000
Torque range (mNm) 0.1 - 30
Speed range (rpm) 0.5 - 800
Temperature range (°C) -20 - 100
Sample volume (cm3) 8 - 80
Typical testing time (min) 1
Reproducibility (+/- %) 1
Comparability (+/- %) 2-4
Remarks absolute viscometer
http://www.thermo.com
Advanced Electronic Ceramics I (2004)

2. Cone and Plate Viscometer
http://www.brookfieldengineering.com/support/documentation/Dial_85_150_N898.pdf
Advanced Electronic Ceramics I (2004)
Cone and Plate Viscometer
- highly viscous liquid and paste
- butter
- Binding agent, resins, ink, paste solder
- resistance paste
Cone rotate thus shearing the test sample
The torque of the rotating cone depends on the
viscosity of the fluid.
- measurement at the different angular velocities
enables the viscosity measurement as a function
of shear rate
http://www.thermo.com
Advanced Electronic Ceramics I (2004)

3. Rotational-Type Viscometer
The ViscoTester 7 instrument is a classic rotational
viscometer for the fast determination of viscosity as defined in
ISO 2555 and many ASTM standards. The results are 100%
compatible to the Brookfield method. It features an RS232
interface for data transfer to PC or printer, digital display with
viscosity readout, windows software (optional) for data display
and evaluation, a complete set with spindles, stand and
carrying case and a 24 month full warranty with optional
extension via service contract.
Specifications:
measurement Speed steps (rpm) 0.3, 0.5, 0.6, 1, 1.5, 2, 2.5, 3, 4, 5,
employs a spindle 6, 10, 12, 20, 30, 50, 60, 100, 200
immersed in the Number of spindles L 1-4, R 2-6
Temperature range (°C) up to 150
fluid sample to
Sample volume (cm3) 650
sense torque
Typical test time (min) 1 to 2
resistance when
Mains 115-230/50-60Hz
running at
Repeatability (+/- %) 0.5
constant speed.
http://www.thermo.com
Advanced Electronic Ceramics I (2004)
Portable Viscometer
http://www.hydramotion.com/visc3.html
Advanced Electronic Ceramics I (2004)

4. Falling Ball Viscometery
A fluid sample - in almost all cases it is liquid - is contained in a glass
measuring tube (1) surrounded by a jacket (3) to allow an accurate
temperature control by means of a constant temperature circulator. This
tube is positioned in a 10° inclination with respect to the vertical. The
tube has two ring marks A and B spaced apart by DL = 100 mm. A ball
(2) is allowed to fall through the fluid sample. Falling from the starting
position (speed v = 0) at the top of the tube the ball first accelerates
along the distance Lv to allow the ball to reach a steady-state speed
providing a uniform shear flow of the liquid in the sickle-shape gap
surrounding the ball. The time Dt required for the ball to pass between
the two ring marks A and B is measured. The value Dt can be used to
calculate viscosity in the absolute units of [mPa·s]. The instrument is
calibrated by means of Newtonian liquids of known viscosity.
http://www.thermo.com/
Advanced Electronic Ceramics I (2004)