manufacturer :       Malvern

model :                   Bohlin Gemini

annotation :           Dokumente engl .

Bohlin Gemini           Rheological measurement made easy

The Bohlin Gemini rheometers are an advanced range of compact research level instruments with ‘fluids to solids’ capability. They are optimized for both strain controlled and stress controlled operation. A Bohlin Gemini is the centerpiece of a complete, high performance, modular rheometer system, including a wide range of measurement geometries and accessories.

EasySwap ^TM temperature controllers include Peltier devices, a forced gas oven with optional liquid nitrogen cooling, electrical heating and a range of fluids circulators. The Gemini can be quickly and easily configured to allow testing across a full range of materials and applications.

Overview                                 Bohlin Gemini

Comprehensive rheological analysis

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Torque range:

Gemini II 200                            0.05µNm to 200mNm in controlled stress & rate viscometry

0.05µNm to 200mNm in controlled stress & strain oscillation

Gemini HR ^nano                                     10nNm to 200mNm in controlled stress & rate viscometry

3nNm to 200mNm in controlled stress & strain oscillation

Torque resolution:                   Better than 1 nNm

Position resolution:                  50nrad

Frequency range:                    1 µHz to 150Hz

Controlled speed range

(CR mode):                             0.01 mrad s ^-1 to 600rad s ^-1

Measurable speed range

(CS mode):                              10nrad s ^-1 to 600rad s ^-1

Normal force N1

measurement range:             0.001 N to 20N (50N optional)

Step change in strain:             <10ms

Temperature range

( dependent on control used): -150ºC to 550ºC

Temperature controls

Fluids Circulator:                     -40ºC to 250ºC

ETO

(Extended Temperature

Option):                                    -15ºC to 300ºC

Melts Oven:                             ambient to 450ºC

Peltier Plate:                            -30ºC to 200ºC

Peltier Cylinder:                       -20ºC to 180ºC

Universal Peltier Option – Coaxial Cylinder or Cone/Plate Geometries

ETC

(Extended Temperature

Cell):                                       ambient to 550ºC

ETC

with optional LTU

(Low Temperature Unit):        -150ºC to 550ºC

Nominal operating voltage 110 or 220V

Size (with Peltier plate)           52cm (H) x 33cm (W) x 37cm (D)

Weight (with Peltier plate)       28kg

Optional equipment

Measuring Systems

Vacuum Disposable Plates:   Peltier Plate, Melts Oven or ETO

High Pressure (Sealed Cell): 40bar pressure, 30ºC to 150ºC

High Pressure/

High Temperature Cell:           300bar pressure, ambient to 300ºC

Optical UV Curing Cell

Optical Analysis Cell

Immobilisation Cell

Electro- rheology Cell:             DC voltage up to c.10kV