Gemini - specification

The Malvern Bohlin Gemini is an advanced range of modular and compact rheometers with 'fluids to solids' capability. They are optimized for both strain controlled and stress controlled operation, can accept an extensive range of temperature control options, and have wide application in research and product development. Patented Rotonetic 2 drive technology allows the system to perform strain controlled tests in steady, dynamic and transient modes, as well as all stress controlled functions.

		Gemini II	Gemini HR nano

Torque range :	10nNm to 200mNm, controlled stress/rate viscometry.
	3nNm to 200mNm, controlled stress/strain oscillation.

	0.05µNm to 200mNm Controlled stress/rate viscometry. Controlled stress/strain oscillation.



Torque resolution:	Better than 1nNm

Position resolution:	50 nano radians

Frequency range:	1 micro Hz to 150Hz

Controlled speed range (CR mode):	0.01 milli rad/sec to 600 rad/sec

Measurable speed range (CS mode):	10 nano rad/sec to 600 rad/sec

Normal force NI measurement range:	0.001 to 20N (50N option)

Step change in strain:	<10ms.

Temperature range (dependent on control used) :	-150°C to 550°C

Temperature controls

ETO system :	-15°C to 300°C

Melts oven :	ambient to 450°C

Peltier plate:	-30°C to 200°C

Peltier cylinder:	-20°C to 180°C

ETC:	ambient to 550°C

Low temperature extension to ETC:	-150°C to 550°C

Accessories

Measuring systems:

Vacuum disposable plates:

High pressure (sealed cell):

UV curing (optical cell):

Electro rheology cell: