Air Quality Index Multi-Gas Station
Build an Air Quality Index Multi‑Gas Station with Arduino Mega
Every part needed, pre‑tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3‑5 days.
Environmental monitoring demands precision when measuring multiple gases simultaneously. This station combines MQ‑2 for LPG and smoke, MQ‑135 for general air quality, and the MH‑Z19B NDIR CO2 sensor into one calibrated system. A 1.8‑inch TFT displays a consolidated AQI score, timestamped by a DS3231 RTC and logged to microSD — ready for field deployments, Smart India Hackathon prototypes, or B.Tech final‑year projects.
What You'll Build
You’ll assemble a standalone air quality station that ingests three gas sensor streams, applies India‑relevant AQI breakpoints (based on CPCB guidelines for CO, NO₂, and PM₂.₅ surrogates via VOCs), and renders a real‑time index and colour‑coded health category on the TFT. The DS3231 ensures readings carry accurate timestamps, while the microSD logger stores CSV logs for later analysis.
What You'll Learn
- Calibrating electrochemical and NDIR gas sensors using known concentration curves
- Implementing multi‑sensor fusion algorithms and weighted AQI sub‑index computation
- Interfacing SPI‑based TFT displays and I²C RTC modules on Arduino Mega
- Designing robust field‑ready prototypes with PCB prototype boards and power management
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| MQ‑2 Gas Sensor | 1 |
| MQ‑135 Gas Sensor | 1 |
| MH‑Z19B CO2 Sensor | 1 |
| 1.8in TFT ST7735 | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| M‑M Wires | 30 |
| 9V Battery Snap | 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
Ideal for B.Tech ECE and EEE students building air quality monitoring capstone projects, participants in Smart India Hackathon and NIT/VIT/BITS internal hackathons, and researchers prototyping environmental IoT nodes. The advanced sensor set and PCB prototyping boards also suit ATL‑mentored college incubation labs looking for a ready‑to‑assemble reference design.
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 inside the box to launch the AI companion; it walks you through calibration, wiring diagrams, and code. For complex issues, message us on WhatsApp with a photo and we’ll get back within business hours.
Does the kit come with pre‑loaded firmware and AQI calculation code?
Yes — you get a complete Arduino sketch that computes AQI from MQ‑2, MQ‑135 and MH‑Z19B readings using lookup tables aligned with CPCB categories. You can modify thresholds inside the code.
Can I add a particulate matter (PM) sensor to this setup?
Absolutely. The Mega has spare hardware UARTs and analog pins. Our AI companion includes a wiring diagram for integrating an external PM sensor and merging its data into the existing AQI logic.
What tools do I need beyond the kit?
A soldering iron, basic hand tools, and a computer with Arduino IDE are required. The PCB boards let you permanently mount sensors once you’ve verified the circuit on a breadboard (not included).
MQ-2, MQ-135 and MH-Z19B measure LPG, air quality and CO2 simultaneously. Combined AQI score on TFT display.
What's in this kit
- Arduino Mega 2560
- MQ-2 Gas Sensor
- MQ-135 Gas Sensor
- MH-Z19B CO2 Sensor
- 1.8in TFT ST7735
- DS3231 RTC
- MicroSD Module
- 10kΩ Resistors x10
- 100nF Caps x10
- PCB Prototype Board x2
- M-M Wires x30
- 9V Battery Snap
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.
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