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Your cart is empty.Analog UV Light Sensor Breakout - GUVA-S12SD 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 we tossed on an Op Amp to amplify the signal to a more manageable volt-level. This sensor is much simpler than our Si1145 breakout, for 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. How 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/cm²), 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, our 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. Specifications Dimensions: 10mm x 19mm x 2mm / 0.4 x 0.75 x 0.08 Weight: 0.7g Downloads & Resources Datasheet Fritzing object in Adafruit Fritzing library PCB EagleCAD files in GitHub . Made in United States.
Matthew Mehlich
2025-08-30 17:24:21
Amazingly simple to use. Had it up and running on an Arduino Nano in about 15 minutes: 10 lines of code, 3 wires to Nano and a USB hookup to PC. Used a simple serial com link to read the data and put it in a window. I used a lizard lamp (this one from amazon www.amazon.com/gp/product/B0771JLF5G) and got readings from 0 (lamp off) to over 500 when lamp was 1/4in from diode.
Ron
2025-08-25 15:24:30
faster than told delivery, product arrived ahead of expected delivery. works as expected.
Dr. Z
2025-08-19 10:56:13
Have not used it yet but being Adafruit product it will be a great board.
Aidan
2025-06-21 14:20:16
If you want to use this for indoor use - don't. The transducer is not sensitive enough for applications that don't involve direct outdoor sunlight.
JCS
2025-05-11 16:32:15
Dead accurate, but when driving a less than 100 micro amp 1 Volt meter the op amp appears to cutout thermally after less than a minute in direct 80+ degree sunlight. If this is not a load issue when combined with ambient heat, using this a a sensor in a remote weather station defeats the purpose, as it would have to be mounted in an enclosure with a uv transparent window which would get even hotter. If it is a load issue, then the base station will need a buffer amp or a high impedance meter. But as a portable sun meter for temporary readings, it's a cheap kludge!
Jetengineman
2025-03-01 15:04:02
Works well and sesetive to frequencies as advertised.
Muddy
2024-12-28 20:59:09
I'd normally trust Adafruit (one of my favorite companies), but I couldn't get much of a rise out of this sensor. They said it has an OpAmp in it. I put it on my ocilliscope, and could only see a faint bump when exposed to some form of UV light. As I understand, it's supposed to have quite a voltage swing on the presence of UVA and UVB. Figuring I lacked a valid source, I took it outside and pointed it straight at the sun. No change. Hm. I think it's busted and will get a replacement. Probably fun to use. But I don't know yet.
Customer
2024-12-12 16:47:14
Use as aid for training on Aduino
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