Diffusion Rate vs Temperature Study Kit with Arduino Uno + Relay
Build an Arduino-Powered Ion Diffusion Rate vs Temperature Analyzer for Your Advanced STEM Project
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
What if you could precisely map how ion diffusion rates change with temperature — and build a fully automated test rig to prove it? This kit lets you construct a dual-chamber diffusion cell, control a heater with Arduino, and log TDS readings over time. The result is a university-grade lab instrument that exports data for rigorous analysis.
What You'll Build
You’ll assemble a two-chamber membrane diffusion cell with a temperature-controlled heater using the DS18B20 probes and relay module. The Arduino reads TDS EC meters on both sides of the membrane at timed intervals, recording conductivity with timestamps from the DS3231 RTC to a microSD card. The live TDS values and temperature appear on the OLED display, giving you a complete experimental log for plotting diffusion rates versus temperature.
What You'll Learn
- Design a PID-controlled heating loop using DS18B20 temperature feedback and a relay module for precise temperature regulation.
- Calibrate TDS EC meters and relate conductivity to ion concentration for accurate diffusion measurement.
- Implement time-stamped data logging to a microSD card with an RTC, generating CSV files for spreadsheet analysis.
- Apply Fick’s law of diffusion to calculate diffusion coefficients from your experimental data and validate the temperature dependence.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| TDS EC Meter | 2 |
| DS18B20 Temperature Probe | 2 |
| 5V Relay Module | 1 |
| DS3231 Real-Time Clock Module | 1 |
| MicroSD Card Module | 1 |
| 0.96-inch OLED Display | 1 |
| 4.7kΩ Resistor | 5 |
| 100nF Ceramic Capacitor | 10 |
| PCB Prototype Board | 2 |
| 9V Battery Snap Connector | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This advanced kit is designed for B.Tech ECE/EEE and M.Sc. Physics/Chemistry students executing lab projects, particularly those building custom instrumentation for diffusion studies. It’s also ideal for CBSE Class 12 students with strong electronics aptitude undertaking investigatory projects in chemistry, and for Smart India Hackathon participants needing reliable sensor integration. ATL tinkering labs and IIT/NIT/VIT/BITS engineering project groups will find the kit a time-saving, validated starting point.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to access your AI build companion trained specifically on this diffusion rate kit. It provides step-by-step guidance, circuit checks, and coding help. You can also message us on WhatsApp for direct support.
Can I use this kit with a different heating element than the provided relay module?
Yes, the 5V relay can switch any heater up to 10A 250V AC. For educational safety, we suggest a submersible aquarium heater with a metal housing; the kit’s temperature control algorithm works with any resistive heating element.
Does the kit include the membrane for the diffusion cell?
The kit provides the electronics; you’ll need to source your own semi-permeable membrane (e.g., dialysis tubing or ion-exchange membrane). We include example protocols and material suggestions in the build guide.
How accurate are the TDS measurements for calculating diffusion coefficients?
The TDS EC meters have a resolution of ±0.5% of the reading. Combined with precise DS18B20 temperature compensation (±0.5°C), you can obtain reliable diffusion coefficients suitable for lab reports and academic publications.
TDS EC sensor tracks ion diffusion rate across a membrane at different temperatures controlled by heater relay.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items