Coulometric Karl Fischer Titrator Kit with Arduino Uno + LED
Coulometric Karl Fischer Titrator Kit with Arduino Uno & OLED — Build a Precision Moisture Analyzer
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Measure trace water content in transformer oil, pharmaceutical samples, or chemical reagents with this advanced coulometric Karl Fischer titrator you assemble and program yourself. The kit uses constant current electrolysis paired with an ACS712 current sensor to integrate coulombs precisely, calculating moisture content down to micrograms. Perfect for research labs, industrial quality control, or independent analytical work where commercial Karl Fischer instruments are out of reach.
What You'll Build
You'll construct a fully functional moisture analyzer that performs coulometric Karl Fischer titration with an Arduino Uno as the control brain, an OLED display for real-time results, and microSD data logging for traceability. The system generates iodine electrochemically at a platinum electrode, and the ACS712 tracks the total charge passed until the titration endpoint, delivering accurate water content readings without manual reagent handling.
What You'll Learn
- Principle of coulometric Karl Fischer titration: iodine generation and endpoint detection
- Reading and integrating current sensor data from ACS712 and INA219 for cumulative charge calculation
- Programming an Arduino Uno to control MOSFET switching, monitor electrolysis, and update an OLED
- Using a DS3231 RTC to timestamp measurements and log them to microSD for later analysis
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ACS712 5A | 1 |
| INA219 | 1 |
| IRF540N MOSFET | 1 |
| LM334 Current Source | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 100nF Caps | 10 |
| PCB Prototype Board | 3 |
| Platinum Electrodes | 2 |
| 9V Battery Snap | 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 targets final-year B.Tech ECE/EEE students, research scholars, and professionals working in analytical chemistry or industrial maintenance. It's ideal for Smart India Hackathon projects involving moisture measurement, IIT/NIT/VIT/BITS lab setups, and for technicians monitoring transformer oil moisture in power distribution companies.
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 on the box to open the AI build companion for immediate troubleshooting. You can also reach us via WhatsApp for direct engineer support within 24 hours.
Can this titrator measure moisture in solid samples?
Yes, by dissolving or extracting moisture from the solid into a suitable anhydrous solvent. The kit's coulometric cell then measures the water content in that solution.
How accurate is the moisture measurement?
With proper calibration and stable current control, the system can detect water quantities in the microgram range, comparable to entry-level commercial coulometric titrators.
Do I need additional chemicals to operate the titrator?
Yes, a Karl Fischer anode reagent and a suitable cathode solution are required. These are not included, but we provide a list of reliable suppliers in India.
Constant current electrolysis cell. ACS712 integrates coulombs to calculate moisture content of sample.
What's in this kit
- Arduino Uno R3
- ACS712 5A
- INA219
- IRF540N MOSFET
- LM334 Current Source
- DS3231 RTC
- MicroSD Module
- 0.96in OLED
- 100nF Caps x10
- PCB Prototype Board x3
- Platinum Electrodes x2
- 9V Battery Snap
- Soldering Iron
- Solder Wire
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