Super Sensors Grove Dust Sensor(PPD42NS)

alright guys welcome back - it kind of works and today we have a really cool little sensor here now I've been sitting on this for just a little while and what this is is it's an air quality dust sensor and so that sounds kind of boring but actually it's really useful so if you live in a city or you're taking care of elderly people or anything like that where air quality matters this is a really useful thing to have and what's even cooler it's really easy to hook up so basically the way that this sensor works is inside of this little metal box we have a LED and we have a sensor so what we do is we shine the LED and this little circle here is hollow so air can freely pass through it we've shined the LED through this little hollow area where air can pass through and on the other side or maybe there's a mirror in there there's a sensor that lets us pick up how much light is reflected and ho