 JP's product pick of the week, it's me JP and here we are ready for another product pick of the week. At least I know I am. Are you ready? Let's do it. So the first thing I like to do is send you somewhere else. Go to this product page because if you head to product page 4867, you are not only going to get to watch this show inside a product page, but you can get 40% off on today's product. So head here. In fact, I'll show you. There it is. Go to that URL right there. I'm going to refresh my browser and watch the price magically drop from 5895 to 3537 unheard of. So that is, let me get this out of the way for you. That is where you want to go. I'm going to head to this product page. It is, throw my glasses here, what did I say, product ID 4867. If you didn't know that with Adafruit, if you know the product ID, you can get there. It's just Adafruit.com slash product slash and then the product ID. So head here or point your camera to that QR code right there and you're going to get yourself 40% off on today's product. You can watch the show inside of the page. And now what I'm going to do is have Lady Adas tell us a little bit about this product. So take it away. Wouldn't you, Lady Adas? Okay. So we've got a new air quality sensor and this one is kind of interesting because a lot of CO2 sensors you see like the SGP 30, they're not true CO2 sensors. They're not actually measuring the CO2 in the air. They're kind of approximating it based on volatile organic gases that they're measuring and they sort of do some math and they sort of do analysis and they're like, okay, this is what we think the CO2 is and we're pretty close. But this is a true NDIR sensor. So this is a sensor that uses, well into the Wikipedia and I don't say completely forgot everything about it, but it uses infrared light to detect how much CO2 is actually in the air like parts per million. So this is what they use when you want to actually measure atmospheric carbon dioxide or you want to measure actual airflow in a building or you're measuring CO2 in a greenhouse or you're measuring emissions from machinery and you want to measure how much CO2 is coming out of them. This is the device. So this is from Sincereon and they make great sensors. The sensor that they make is like this chunky module you see in the middle, the green thing. There's actually a little microcontroller and also an SHT31 humidity and temperature sensor. So you actually get CO2 plus temperature plus humidity. All over I-squared C and the data kind of pops out over one I-squared C port and we have code in Arduino and circuit Python and Python. It's very easy to use. Basically every two seconds or so you get a new piece of data. You can change how often the data gets emitted like from two seconds to an hour, but you're not going to get data more than every two seconds and you can even see that glowing light that's it performing the sensing in the cavity inside this plastic body. So it's a really cool sensor. They're not as inexpensive as a basic air quality sensor because it's again doing true CO2 sensing. But again there's nothing, I mean it's $60 but there's nothing less expensive that does the real thing and like I said this is the real thing, this is true CO2 sensing. So right now it's measuring indoors about 800 ppm, that's not unusual. It's winter, we have things are closed and not a lot of air circulation happening here. If I breathe near it you will see the CO2 rise. The little video we have, it's a compressed can of air which is of course going to have a lot of CO2 in it but it's even like me breathing it does increase the CO2 in this area and you can see the glowing IR sensing element at the end there that from the air that's kind of flowing in it measures it and then sends the reading out over I squared C. So we just started on to a breakout board for you to make it really easy to use. It's got level shifting and regulator so it can be used with 5V or 3V you know raspberry pie or anything in between but for people who want to do environmental sensing, environmental science, earth science, emissions, air quality like this is really the sensor you want. I actually haven't been able to find any other sensor that's under a couple hundred dollars that does this so easily. So good on Sincerion for making a great quality sensor for an affordable price. Alright well that sure convinces me that I need to check this out. Let me head right back there to my mystery cabinet of wonder drawers and let me grab one. Yeah that's right things happen. So this is my product pick of the week it is the SCD-30 CO2 sensor in STEMAQT format and you can see here I've got it connected up to a little pipe portal pint. This is the little pipe portal, tiny little pipe portal pint. I've connected it over a STEMAQT cable so I can use the I squared C on that. And then I've just mounted a couple of screws on there so I can hold that sort of in place so let me try that again. The holes don't exactly line up but if I leave one of those screws loose we get it on there pretty good. And what I'm going to do is show you a little demo of it. So let's drop down to the overhead little down shooter camera here and what I'm going to do is plug this in. I've got a little circuit python code running on here that pulls the sensor and then displays it on screen every couple seconds. It grabs a new bit of data and there you can see there's my CO2 parts per million so I've got this is the workshop is pretty well ventilated. I don't even have any extra fans or anything running right now but I keep it pretty well ventilated and I've also got the door open a little bit to the workshop so we're getting pretty good airflow so this is a nice healthy CO2 level. You are generally looking at anything under a thousand parts per million in the area that you're breathing. That's great. That's where you want to be. When a 2,000 is not terrific you should try to improve it between 2,000 and 5,000 I believe it is. You probably have a problem that needs to be investigated and over 5,000 this is possibly dangerous get out of there and clean up your air. So you can see as this is really I think one of the best demos is breathe on it right because we breathe in oxygen and we breathe out a whole bunch of carbon dioxide so what I'm going to do is just lean down and breathe on this and what you'll see is there's a couple things going on with this. First of all the sensor looks like a little Lego minifig to me see these little torso and legs there no arms but what do you want to do and a cute little helmet with a glowing eye. So that LED lets us know when it is running its calculation on the incoming air. Air comes into these little ports on the side you see these little silver ports that's I believe where the air comes in and I don't know what these little leg bits are for honestly could be a flow thing who knows. So any air in that area is being sensed what I'm going to do is I'm going to breathe on it kind of deliberately right there so in fact I can pull this off of here and you can watch those numbers there as I breathe into this so there you can see I have significantly increased the amount of carbon dioxide in that area and it's going to probably settle down here and then since we have pretty good air flow it should start clearing that out so I'll set this down and leave it alone you should see that just as air flows kind of in its natural way that it's reducing the amount of CO2 there. If I go and fan it right if I just move my hands a little bit and fan some air I'm bringing the more moderate levels of CO2 reduced levels into that area and you'll see it probably drop a little quicker and what I want to do is show you a couple of things about so we mentioned the product page I'm going to jump back here for a second to my browser so there's the product page and if you scroll down you'll get to some of the specifications by the way this also does include a humidity and temperature sensor I think it's the I forget which one is on here it's one of the ones that we have as a separate breakout but it includes a little humidity and temperature sensor which might be useful depending on what you're trying to monitor. If we want to know more about it click on the technical details or the guide they'll take you kind of the same place. So here's the guide it gives you info about the sensor and yes the SH-T31 temperature and humidity sensor is the additional sensor that's built on to there as well as this NDIR CO2 sensor. If you click on the little downloads link you can check out the datasheet from Censurion and that will tell you about the accuracy the range it can measure from 400 parts per million all the way up to 10,000 parts per million the rate at which it can do the calculation it's about every one measurement every two seconds so that's something that the sensor itself will let you know it has you can you can ask it are you ready to give me new data so you don't have to check it constantly just wait for it to return the yes I've got new data for you to check out and then if you want to see the circuit Python library in action and you know what I'll do is I'll bring the sensor back into view there so we can see yeah we're still at a pretty nice and healthy below 1000 parts per million so here I've got the circuit Python code that I'm running what's going on here I'm importing a bunch of libraries including the board and bus IO so that I can get pinouts for using I squared C we also have some stuff and I'm using with display IO text display text and layout so that we can use the display on this pipe portal pint and then we import the Adafruit SCD 30 library and that contains all that we need really to interface with the sensor we then set up our I squared C bus and we set up the sensor on I squared C and then a lot of this here I'm going to scrub down because that's all about just setting up the display to give us this info and then here is what I was talking about during the main loop of the program we check this if SCD data available so we wait for the board to tell us yes I've got some data then we'll do the following will print a bunch of things I'll show you that in a second but the key here is that I am taking this SCD CO2 reading that's the carbon dioxide reading and I'm turning that number into a string just so I can display it easily and then I change my label on the screen to show that text so if I open up my serial monitor here you can see this is the data we get every two seconds tells us that we have this 740 ish parts per million of CO2 temperatures at about 28 degrees centigrade in here and humidity is about 30% so that's it that's all it takes to to query it if you look at my print statements here you can see I can just ask for the sensors temperature the sensors relative humidity and the sensors CO2 we also have in the guide some information about calibration and some other more advanced settings but in its simplest state all you have to do is ask the sensor hey what's the CO2 level you get a return to you in parts per million nothing to convert it's in the units that we care about so another thing I thought would be kind of interesting here is let me go to just pure down shooter camera here I guess I can stay up there and I was kind of curious let me move my camera a little bit I was kind of curious what would happen if I take this sensor and I dangle it into a jar in which I've got a bunch of sparkling water because my guess is this is sparkling water that is giving off a bunch of CO2 it's probably still water that was charged full of CO2 right before it got thrown in the can there it's my guess ingredients carbonated water so not a lot of mineral content unless they've added some but I don't think they have so I think this is pretty much CO2 in water so what I'm going to do is pour some into this jar here and then dangle my sensor into there and I'll even put this cap on and I'm not doing a great experiment here because we didn't do a control beforehand but you can see there I can I can tell that we're getting way way high levels actually I thought this I thought this was outside of the range of what the sensor did so yeah a lot of CO2 inside of there right that's just tons and tons of CO2 gas inside of there if I open it up let's see does it dissipate quickly is there enough air flow maybe I'll wave my hands around a little bit we may have all just also just hit a limit on it where it's it I doubt that it's going any higher than that regardless of what the what the quality of that air is alright let me take me take it out of there for a second let's see have I have I simply confused it let's give it a couple seconds I can yeah okay you can see it coming down so whatever that is it's outside of what we can measure I think so it's probably this sensor is probably not designed for a science experiment about the concentration of CO2 in a really tight area it's more about breathable levels so up to I what think they said 10,000 parts per million in the general air not in a little confined area like that but I could be wrong look at the datasheet there may also be range settings that you can invoke in the library that I haven't looked at I'm using it and it's kind of most basic form so let's see that about sums it up it's a really cool sensor like 88 said this one is really doing the proper calculation for CO2 it's not just guessing based on other particulate matter and volatile organic gases in the air this one is straight up CO2 sensing so that is it that is my product pick of the week I'm gonna go ahead and take that off of there like so pull this out that connector is really in there I'm gonna do the bad thing and pull it by the wires there we go so let's finish this up before I leave I'll remind you head on over to the product page just during this broadcast and you're gonna get a 40% off so it's down to $35 from normally 5895 it's down to 3537 to be precise 40% off you can get a maximum of 10 of them and this discount is available just during this live stream so it's gonna disappear after this if you're thinking of getting one go ahead and get it I think there's a short grace period once you get in your cart for you to place your order but don't dally if you're if you're interested in doing some CO2 sensing then this is probably the board for you so that is my product pick of the week it is the SCD 30 CO2 sensor and I'm gonna go ahead and place that on my STEM a QT board of goodness I don't have a specialized hangar so it's gonna dangle a bit right there alright thank you so much for a different industries I'm John Park this has been JP's product pick of the week and I will see you next time bye bye