WaveshareDC3.3-5V 200nm-370nm Response Wavelength UV Detection Sensor Module Ultraviolet Ray UV Sensor Module for Arduino

I was expecting something more sensitive, but no. Still working on this!

The module comes in a static protection ziplock and they provide a pre-wired female connector so that the heat from the soldering will not damage the module as you do this with the adapter not attached to the module.I used a portable 5V USB power bank as the power source.I connected the output from the module to the 2V DC range of a multimeter.When in full sun, the unit showed 0.42V. I tested 2 UVC sterilization boxes. The one with a 4W bulb showed 0.05V, the one with an 8W bulb showed 0.1V...I tested my sunglasses and the signal dropped from 0.42V to 0.009V, so UV protection works!Hope this helps.

I really like this detector!Calibrated UV A/B and C detectors usually cost $150-$300. For sure they will give you the exact power deposition per square centimeter, which is something you cannot expect from this sensor, but it gives you a relative intensity measure. The detector puts out an analog signal that can be read with a micro controller or with a volt meter. I attached some pictures that show the voltage reading in a distance of approx 11-12 cm to different lamps.If you are interested in a relative readout, this detector will do the job!It is particularly useful to check whether your UVC lamp actually emits UVC light. The market is flooded with fake UVC LEDs that are sold as germicidal UVC lamps. All UVC LEDs have a brass/metal base/chip with a quartz glass window (only quartz lets UVC pass and plastic bases would be destroyed by UVC). LEDs with white plastic bases/chips that emit a blue light are so called "ice blue" LEDs and they might emit a tiny little bit of UVA close to 400 nm.With this detector you can check if your lamps actually emit UVC light and UVB/A up to 370 nm. This detector is supposed to detect the bandwidth from 200-370 nm and UVC does not penetrate plastic or regular glass. So, if you get a reading, your lamp emits either UV A/B, UVC or both. If you place regular glass between the detector and the light source and still get a reading, then your lamp emits UV A or B, but not UVC!I attached a few pictures of a fake UVC LED lamp, two real 25W UVC lamps (mercury-/Hg-vapor), a UVC wand (Hg-vapor), and a blacklight UV flashlight that I bought on Amazon.The reading in a distance of approx 10-12 cm for the fake UVC lamp is zero when the lamp is switched off. Same reading (0V) when the lamp is on, which confirms that this LED does not emit UV light up to the detection limit at 370 nm. The other two 25W UVC mercury vapor lamps show a clear reading without glass (>=0.5V) and no reading with glass (~0 V).A small blacklight (UVA) LED flashlight gives a reading of 0.12 V through glass.Much less powerful a small UVC Hg-vapor wand at a distance of approx 1-2 cm (0.17 V).... So the detector works perfectly fine and allowed me to determine which lamp produces UVC, UVA/B, no UV (<=370nm) (fake UVC) and even tells me about the relative intensity of the lamps. With a calibrated light source this detector could probably be calibrated to yield mW/cm² readings.... Of course you can also do the "banana test" ... but it is much more time consuming and less accurate ;-)The signal of the detector is analog and you can also connect it to a micro controller with analog input such as an arduino or a computer (e.g. a raspberry pi).(The pictures are small, because they were taken remotely with a raspberry pi camera)5 stars!Disclaimer: Stay safe if you should repeat these experiments! remote control the light and wear appropriate PPE!

Den Sensor gibt es in einer analogen und einer I2C Variante. Ich habe die analoge Version eingesetzt. Der Einsatz war unproblematisch. Allerdings wollte ich damit LichtUndichtigkeiten an einem Gerät suchen, welches im Inneren eine starke UVC Quelle besitzt. Die UVC Strahlung dieser Quelle hat eine Wellenlänge von 253 nm. Betrachtet man die Kennlinie des Sensors, stellt man fest, dass dieser in diesem Wellenlängenbereich noch relativ unempfindlich ist, was in meinem Fall nicht hilfreich war. Deshalb besser vorher anhand der Kennlinie überprüfen, ob der Sensor für den gegebenen Zweck geeignet ist.Ansonsten kann ich den Sensor uneingeschränkt empfehlen, sehr schnelle Lieferung etc. alles gut.

Nice UV sensor, using a 3.7v battery, I attached a small digital voltmeter and got an output of a few mv indoors and 1.5v under regular sun, not a precise scientific way to measure but gives a good idea of the sun UV index (I multiply the voltage by 4 to get the UV index)