Review on Waveshare Digital LTR390-UV Ultraviolet Sensor (C) Ultraviolet Ray Sensing Ambient Light Intensity Measuring Direct UV Index Value Output I2C Bus by Gopal Baltimore
Works best in incandescent bulbs
I used this to test several UV lamps I bought to kill COVID-19 virus. It turned out that several lamps sold as UV lamps were just normal black lamps and did not emit UV-C at all. To measure UVC, connect it to a 5V DC power supply and a digital meter. They aim the ultraviolet light directly at the sensor. Then cover the sensor with glass and measure again. If your light source is UVC, there will be a large voltage drop when measuring light through glass. Because glass blocks UV rays.
- Built-in ADC, direct output of light intensity value via I2C bus, less noise interference
- Something else
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