Diffusion in Liquids CRE-3301A
Key Educational Objectives
The CRE-3301A enables students and researchers to:
- Understand the fundamentals of liquid diffusion
- Study molecular mass transfer mechanisms
- Verify and analyze Fick’s Law
- Derive formulas for diffusion coefficient calculations
- Determine diffusion coefficients experimentally
- Analyze one-dimensional diffusion processes
- Observe the effect of concentration gradients on ion transport
- Investigate temperature influence on diffusion behavior
Major Features
- Complete experimental setup for studying diffusion in liquids
- Transparent tank for clear observation of the experiment
- Precision U-tube with multiple capillaries
- Magnetic stirrer to maintain uniform concentration
- Integrated heater with temperature controller and sensor
- Accurate conductivity measurement system
- User-friendly operation suitable for educational laboratories
- Designed for chemical engineering and mass transfer experiments
- Durable and compact laboratory construction
- Ideal for technical training and research applications
Experimental Capabilities
The trainer supports several important laboratory experiments, including:
- Fundamentals of diffusion using Fick’s Law
- Determination of diffusion coefficients in liquids
- Study of concentration-driven mass transport
- Derivation of diffusion equations under experimental conditions
- Investigation of one-dimensional ion diffusion
- Conductivity-based diffusion analysis
Technical Specifications
Tank with Stirrer
- Capacity: Approx. 1000 mL
- Transparent construction
- Integrated magnetic stirring system
Magnetic Stirrer with Heater
- Stirring Speed: 0 – 500 rpm
- Heater Power: Approx. 300 W
- Magnetic Stirrer Bar Included
Diffusion Tube
- Type: U-Tube
- Number of Capillaries: 250 – 300
- Capillary Diameter: 1 mm
- Capillary Length: 5 – 8 mm
Conductivity Meter
- Measuring Range: 0 – 2000 µS/cm
- Graduation: 1 µS/cm
Measurement Ranges
- Temperature: 100 – 400°C
- Conductivity: 0 – 200 mS/cm
Optional Software Package – CRE-3301ASW
The optional CRE-3301ASW Data Acquisition Software is specially developed in the National Instruments™ LABVIEW™ environment. The software allows users to:
- Measure experimental data digitally
- Calculate diffusion parameters automatically
- Monitor conductivity and temperature in real time
- Record and analyze experimental results
- Improve laboratory learning efficiency
- Generate accurate data analysis for research purposes
The software package includes additional electronic sensors and is compatible with any Windows™ operating system.
Scope of Delivery
The complete system includes:
- Experimental unit for diffusion in liquids
- U-tube with capillaries
- Display and control unit
- Conductivity meter
- Magnetic stirrer with heater
- Stopwatch
- Complete instructional and experimental manual
Diffusion in Liquids – CRE-3301A
The Diffusion in Liquids CRE-3301A is a high-quality educational and laboratory training system designed to demonstrate and analyze the principles of molecular diffusion in liquids. This advanced apparatus is specially developed for chemical engineering laboratories, research centers, technical institutes, and universities to provide practical understanding of mass transfer phenomena and diffusion processes in liquid systems.
Diffusion is one of the most important transport phenomena in chemical engineering. It occurs when particles such as atoms, molecules, or ions move from a region of higher concentration to a region of lower concentration due to a concentration gradient. In many chemical and industrial processes, diffusion plays a critical role and often becomes the rate-limiting step of the entire process. The CRE-3301A allows students and researchers to experimentally investigate these principles through a controlled and accurate laboratory setup.
The system uses a concentrated salt solution to study diffusion behavior in liquids. The experimental setup includes a specially designed U-shaped diffusion tube fitted with multiple vertical capillaries. The capillary disc is submerged beneath the water surface inside a transparent tank filled with demineralized water. Due to the concentration difference between the salt solution and the surrounding water, salt ions diffuse through the capillaries into the water bath.
The apparatus is carefully engineered so that ion transport occurs only in one dimension through the capillary channels. This enables accurate analysis of diffusion behavior according to Fick’s Law of Diffusion. To maintain stable experimental conditions, the system includes a magnetic stirrer that continuously mixes the water inside the tank. This prevents local concentration buildup near the diffusion surface and ensures uniform concentration distribution throughout the tank.
A built-in conductivity meter continuously measures the salt concentration inside the tank by monitoring conductivity changes. This allows users to determine diffusion coefficients accurately and observe real-time diffusion behavior. The integrated heating system with temperature control also enables experiments at different temperatures, making the system ideal for advanced mass transfer studies.
