Features
Designed for the measurement of molecular diffusivities
Self-contained unit complete with a diffusion cell, a diffuser vessel, a stirrer system and a conductivity meter.
Tesca Liquid Diffusion Coefficient Apparatus is designed for measurement of molecular diffusivity & contains a diffusion cell, transparent diffuser vessel. The diffusion cell has been designed for fast diffusion rates in liquids to minimize long observation period. The cell basically consists of a honeycomb of accurately dimensioned capillaries, positioned between two liquids of differing concentration of the solute whose diffusion coefficient is to be studied.
During the experiment, students shall place a small volume of concentrated solution on one side of  the honeycomb. At the beginning, the other side of the honeycomb consists of a large volume of pure solvent (water). The solute diffuses from high concentration side to the low side, causing the concentration within the  larger  volume  to  increase.  The  mixture  is continually stirred while the increase in concentration is continuously monitored using a conductivity meter. Detailed Operation & Maintenance Manual is provided along with the trainer.

Specifications
Diffusion Cell
Material: borosilicate glass
- OD: 10 mm (+/- 1mm)
Thickness: 1.5 mm (+/- 1mm)

Capillary: 1 mm (+/- 0.1mm) (bore) x 5 mm (+/- 0.5 mm) x 97 no's made of PVC
Diffuser Vessel
Capacity: 1.0 litre
Material: Clear Acrylic
- OD.: 100 mm
Thickness: 3mm (+/- 0.1 mm)
- Height: 200 mm (+/- 10 mm)
Conductivity Meter
Range: 0- 1,999 μS/cm
Magnetic Stirrer
Range: 0 to 1,500 rpm (max.: 2000 rpm)
Electricity: 240V AC, 1-phase, 50 Hz

Experimental Capabilities
Measurement of mass transfer rates.
Measurement of diffusion coefficients.
The effect of concentration upon diffusion coefficient.
First order unsteady state process analysis.
Familiarisation  with  laboratory  instruments  to obtain data for industrial process design.

Required Services:
Electric Supply 230 V AC, 6 A, Single Phase, Earthed.
Water Supply: Cold tap water supply & Drainage