Adafruit 1918 Analog UV Light Sensor Breakout - GUVA-S12SD

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.

faster than told delivery, product arrived ahead of expected delivery. works as expected.

Have not used it yet but being Adafruit product it will be a great board.

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.

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!