Technical Specifications

Specifications
1. investigation of mixing processes during stirring
2. transparent stirred tank with 4 removable flow impeders
3. speed-controlled stirring machine with digital torque indicator
4. 9 interchangeable stirrers: axial-, radial-, tangential-conveying
5. removable coiled tube for cooling or heating with external water supply
6. portable device for measuring conductivity and temperature

Technical Specifications
Stirred tank
 capacity: approx. 20L
 material: DURAN glass and PVDF (base)
Stirring machine
 speed: 50…2000min-1
 max. power output on shaft: 100W
Stirrers
 5 propeller stirring heads
o 2x 3 blades, D=70mm / 100mm
o 1x 4 blades, D=70mm
o 2x 2 blades (angled), D=70mm / 100mm
 3 paddle stirring heads
o 2x paddle: 70x70mm with 3 / 6 holes
o 1x paddle: 70x100mm with 10 holes
 1 turbine stirrer with shaft: D=50mm
Coiled tube
 diameter: approx. 140mm
 material: stainless steel
Measuring ranges
 conductivity: 0…200mS/cm
 temperature: 0…85°C
 speed: 50…2000min-1

Optional: ‘Sci-Cal’ Computer Control Software & Interface

‘Sci-Cal’ software & hardware has been designed for use with more than 600 ‘Sci-tech’ trainers. ‘Sci-Cal’ comes in a module that can be fitted or mounted on the Sci-tech trainers very easily.

‘Sci-Cal’ box has 11 inches front HMI interactive panel, inside are i3 processor computer with it’s own hard drive & software processor with 16 to 32 analog and 16 to 32 digital signal data-loggers. The ‘LabVIEW’ processes the input signal with in-built data and formulae to tabulate results for the Sci-tech trainers.

‘Sci-Cal’ box has HDMI output for connection to a projector or an electronic whiteboard or a monitor.

‘Sci-Cal’ box has input ports for inputs from the Sci-tech trainer sensors.

‘Sci-Cal’ eliminates requirement of external computer.

Experiments:
 Flow fields of various stirrer types
 Power demand, mixing time, mix quality dependent on
 stirrer type
 speed
 materials used (density, viscosity)
 insertion of flow impeders
 Observation of the suspension state of suspended solids when using different stirrers and at different speeds
 Observation of the droplet size of emulsions when using different stirrers and at different speeds
 Influence of mixing processes on heat transfer

Requirements
 Mains Power 220 – 240V @ 50Hz, 1Ph