HVAC Ozone Monitor Kit v4: Dobson Unit Data Logger
HVAC Ozone Performance Monitor Kit v4: ESP32 Solar Logger with Dobson Unit Estimation
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Whether you're an HVAC technician verifying UV lamp performance or a facility manager tracking indoor air quality, this kit lets you build a self-contained, solar-powered ozone monitor. It logs UV-A, UV-B, temperature, humidity, and altitude, then computes a proxy Dobson unit estimate-giving you a reliable, long-term record of ozone levels independent of factory calibration.
What You'll Build
A fully weatherproofed ESP32 data logger that records UV irradiance at two wavelengths, ambient conditions, and derives total ozone column in Dobson units. The 1.8-inch TFT screen displays real-time readings, while the microSD card stores months of data for HVAC performance audits or environmental compliance. Powered from a solar panel with Li-ion backup, it runs unattended and can email daily summaries via WiFi.
What You'll Learn
- Calibrating ML8511 UV sensors for UV-A and UV-B and correcting for altitude using BMP280 pressure data
- Implementing the Dobson ozone estimation algorithm from UV ratio measurements
- Building a solar-powered IoT logger with deep-sleep power management on ESP32
- Graphing time-series data to evaluate HVAC system efficiency and detect UV lamp degradation
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| ML8511 UV Sensor | 2 |
| BMP280 | 1 |
| DHT22 | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 1.8in TFT ST7735 | 1 |
| LM2596 Buck Converter | 1 |
| 18650 Cell | 2 |
| 18650 Holder | 1 |
| 100nF Caps | 10 |
| 4.7k? Resistors | 5 |
| PCB Prototype Board | 2 |
| Solar Panel 6V 1W | 1 |
| Waterproof Enclosure | 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 kit is designed for advanced builders and professionals. It's ideal for HVAC maintenance engineers in commercial buildings, smart building startups, B.Tech ECE/EEE students tackling final-year projects on IoT air quality monitors, and participants of Smart India Hackathon seeking a pre-integrated environmental sensing solution. If you manage ATL tinkering labs or are an educator at IIT/NIT, this kit provides a ready-to-deploy module for advanced workshops.
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 launch the AI companion trained on this kit, which walks you through sensor calibration and code. For human help, WhatsApp us directly-response within 12 hours.
Can this kit measure ozone directly?
No, it computes an ozone estimate (Dobson units) by comparing UV-A and UV-B intensities. This indirect method is used by scientific ozone monitoring stations and works reliably after altitude correction.
Does the solar panel keep it running overnight?
The 18650 batteries store enough power for 3 days without sun, and the ESP32 deep-sleep minimizes consumption. For continuous operation, place it where it gets 4-6 hours of direct sunlight daily.
Can I interface this with Building Management Systems (BMS)?
Yes, the ESP32 can publish data via MQTT over WiFi. You'll find example code to send readings to popular BMS platforms like Niagara or Home Assistant in the AI companion.
HVAC - ML8511 UV-A and UV-B sensors with BMP280 altitude correction compute a proxy Dobson unit ozone estimate over time.
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.
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