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# Analog UV Light Sensor Breakout - GUVA-S12SD

**Type:** Product page · **SKU:** ADA1918 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/analog-uv-light-sensor-breakout-guva-s12sd.html ([markdown](https://core-electronics.com.au/analog-uv-light-sensor-breakout-guva-s12sd.html.md))

Extend your light-sensing spectrum with this analog UV sensor module. It uses a UV photodiode, which can detect the 240-370nm range of light (which covers UVB and...

## Pricing

- **Price:** $12.95 (inc GST) — $11.77 AUD, exc GST
- **Quantity discounts:** 10+ $11.42 (exc GST) · 50+ $11.18 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 27 more in 8–12 days.

## How to buy

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## Description

Extend your light-sensing spectrum with this analog UV sensor module. It uses a UV photodiode, which can detect the 240-370nm range of light (which covers UVB and most of UVA spectrum). The signal level from the photodiode is very small, in the nano-ampere level, so they tossed on an opamp to amplify the signal to a more manageable volt-level.
 
 This sensor is much simpler than Adafruit's Si1145 breakout, it only does one thing and gives an analog voltage output instead of requiring a complicated I2C setup procedure. This makes it better for simple projects. It also has a 'true' UV sensor instead of a calibrated light-sensor. To use, power the sensor and op-amp by connecting V+ to 2.7-5.5VDC and GND to power ground. Then read the analog signal from the OUT pin. The output voltage is: Vo = 4.3 \* Diode-Current-in-uA. So if the photocurrent is 1uA (9 mW/cm^2), the output voltage is 4.3V. You can also convert the voltage to UV Index by dividing the output voltage by 0.1V. So if the output voltage is 0.5V, the UV Index is about 5.
 
 Please note, Adafruit's UV LEDs are 400nm, outside the range of this sensor, so if you're trying to test this sensor, don't use them! A UV tanning lamp or 'lizard-lamp' will work much better.

## Technical Details

Details:

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/1918guva_15906ebdfa9.pdf)
- [Fritzing object in Adafruit Fritzing library](https://github.com/adafruit/Fritzing-Library)
- [PCB EagleCAD files in GitHub](https://github.com/adafruit/Adafruit-GUVA-Analog-UV-Sensor-Breakout-PCB)
- Dimensions: 10mm x 19mm x 2mm / 0.4" x 0.75" x 0.08"
- Weight: 0.7g

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/9/1918-01.jpg)