GUVA-S12SD UV Light Sensor For Arduino – Easy Analog Output UV-A/UV-B Detection

So you want to measure UV light without the hassle?

This GUVA-S12SD sensor board is your go-to!

It's super simple to use—just hook up VCC and GND to your power source (anywhere from 2.5V to 5V works, perfect for both 5V boards like Arduino UNO and 3V ones like the Adafruit QT Py).

Then grab the UV intensity reading straight from the analog SIG pin.

No complicated setup, no fuss.

It covers the 240–370 nm range, which means it picks up UV-B and most of UV-A light.

The best part?

The output is almost linear, so converting to a UV index is a breeze: just use UV index = SIG × 10 − 1.

That means 0.2V output ≈ UV index 1, 1.0V ≈ UV index 9.

Seriously, it doesn’t get easier than this if you're building a UV monitor, a wearable sun tracker, or just experimenting.

The board comes with pin headers ready to solder (if you need), and it's wrapped up safe in anti-static packaging.

Oh, and we stand by it—if anything's off, Paradisetronic has your back with quick support.

Whether you're a hobbyist, student, or DIY enthusiast, this little board makes UV sensing accessible and reliable.

Perfect for environmental monitoring, wearable tech projects, or educational kits.

Just plug, read, and go—you’ll be measuring UV in minutes!

Plus, its wide voltage compatibility means less worry about power mismatches.

So why wait?

Get sensing and build something awesome today.