 Okay, I'm an MPI, brought to you by DigiNative Fruit this week, Lady Aida. What is it? It's Siocense. Siocense makes sensors, and this is the first time we featured them, which is pretty exciting. So let's get right to it. This is the ENS-160. The ENS-160 is environment sensor, I think that's what the ENS stands for. And it's their latest model, this is not the first time they've done a gas sensor. These are the specs for this one, it's a multi-gas sensor, it's got iSquared-C SPI, we'll go into all this and it gives you air quality, TVOC, effective CO2 output. You might be like, hey, Siocense, didn't they make that other sensor, the CCS-811 and the 801? Yes, they did. This is a very popular air quality sensor slash gas sensor, I think this was actually one of the first, like all-in-one embedded iSquared-C mock sensors. We carried it for a very long time, but as of a few months ago, it's been absolutely discontinued. So you can't get the CCS-811 because the ENS-160 is considered the next generation, so this is what you would upgrade to. So traditional mock sensors used to look something like this, this is actually from a guide that we have unlearned. So on the top left, actually the bottom left is kind of this orange tubular sensor and a lot of people who've used gas sensors, MOX sensors, they've looked something like this. There's four pins and they're in a container and then you like breathe or have air flow through that top mesh and inside is the gas sensor. The above little metal rectangular version with all the dots is a miniaturized version that doesn't have as big of a container, but it's the same idea which is you have a heater and the heater heats up the MOX sensor which is a dope silicon chunk and the silicon is doped in a way that when organic volatile compounds like ethanol or methane get near it or blow by it, the resistance changes. So this is what a lot of MOX sensors look like and for these, you'll notice there is a transistor and next to it is actually, there's a resistor nearby and there's this to control the heating element. So on these MOX sensors, you'd actually have my controller, control, I think like the end pin is what's connected on this breakout, you turn on the heater, you wait a while, you do the reading and you turn the heater off and this is a little clumsy because you need an analog digital input and you need a lot of power and you need to control the heater and like manage the heater because you don't want it on all the time or you could like damage the sensor. So this is a diagram of the CCS 801. This is like the original MOX sensor from SiOSense and you can see they've got integrated is the heating resistor, RH and the volatile organic compound sensing resistor, RS and then what they've done is they've merged these two elements with the external control, which is a heating controller and then an analog digital input converter and then a calculator and that's actually kind of the magic because in the EMS 160 you've got four, it's really cool like rendering, you've got four elements you can see in the explosion diagram to the right each one of them has a separate heater and each one of them is slightly doped differently and by taking the four readings and they perform whatever calculation they can get a better sense of the effect of CO2 and the total volatile organic compounds. So this is the EMS 160, it has I squared C and SPI interfaces and you know you don't have to like you can manually control the heater and get the resistance readings but in general what you do is you just say hey turn on and give me like the effect of CO2 in a T-Voc and it does all that work for you and it even handles the baseline calculations which is something that if you are manually controlling the MOX sensor you would have to do by hand. This is how you connect it up, the only thing to watch for is it does require a 1.8 volt power supply so you can use a VD-DIO of 3.3 volts but you do have to supply it 1.8 volts for the power which makes sense because it has this heating element that you know you don't want to have a high voltage or you have a significant amount of current you're going to need. The three outputs that you're going to get from the sensor you can get the raw resistance readings but in general what people want to get is the T-Voc or the effect of CO2 or what they call the AQI reading which is just a generic air quality reading from one to five that tells you like how good is the air what one is the best and five is you know open a window and what's nice about these readings is again you don't need a binary blob you don't need to do the computation on your own it just sort of like pops out of the sensor automatically. One thing to note is you know because we've covered CO2 sensors before on INAPI is this is a ECO2 sensor which means effective CO2 it's not a true NDIR sensor and they do compare in the datasheet you know here's NDIR outputs versus this sensor and the effective CO2 output in their opinion because you get volatile again a compound release as well as effective CO2 it's better at measuring like air quality but it wouldn't be what you would use if you're actually trying to measure just CO2 so if you're if you're like trying to measure CO2 for outdoor environmental tracking and you're not you don't care about like air quality for humans as much as like you're maybe doing it for plants or you're doing it for industrial purposes this sensor not going to give you like true CO2 but for you know here you know bathrooms bedrooms kitchens offices it's going to do a really good job and you know they did compare for most purposes indoors for humans the effective CO2 is pretty much the same as the NDIR CO2 again it's not if you're not dealing with just humans and indoor office spaces or homes but it's going to be a lot cheaper and use less power than an NDIR sensor much much cheaper. Another thing to note is mox sensors mox sensors even though this one has four elements they don't sense individual disasters so you can't for example ask it hey it's so much ethanol versus methane versus toluene are you measuring it's going to give you like the sum of all of them and have different effective reactions to them but you're not going to be able to tell if you have mostly methane or mostly toluene it's going to sell you total volatile organic compounds. One nice thing that they've added to the ENS 160 is now you can do temperature and humidity compensation because that resistor that dope silicon resistor that measures the effective CO2 and volatile organic compound that is going to be affected by humidity and temperature like the higher the humidity the higher that resistance and it's reacting to humidity not to the organic compounds and so you know this is something that you'll notice especially with like alcohol ethanol sensors if you're breathing into it your breath is just humid enough that it could set off the sensor even if you not necessarily don't necessarily have ethanol in your breath so humidity and temperature compensation is important and you would need a separate temperature and humidity sensor so sense makes one that they suggest but honestly any humidity and temperature sensor will do a fair job and they've got code as well so on the GitHub there is the Sciosense ENS 160 Arduino driver it's got examples and code for I squared C I haven't used this sensor with SPI don't know if it actually works with SPI but it definitely works very well with I squared C and if you want to get started quickly we've got a breakout board part number 5606 which is available at DigiKey they've even got 150 ish in stock right now it comes with the regulator and level shifting so you can only you can get away with just providing it with three to five volts you don't need to do the 1.8 volt level shifting for regulation okay and and they're in stock they're in stock hundreds of them almost a thousand looks like I bought five from their initial stock they've got the ENS 160 in stock right now it is their first mount they also have an eval board but you know honestly I'm going to promote the Adafruit breakout because it's in stock at Adafruit at DigiKey right now all right and they have a video so we're going to play the video that's right let's see the video we feel it on our skin in our lungs it's always there and we need it the air that surrounds us but it can be dangerous because humans and their innovations create pollution which degrades air quality the problem of air pollution caused by both outdoor and indoor sources is far from being solved it represents the single largest environmental risk to health globally air pollution causes 4.5 million premature deaths each year some air pollutants are two to five times more likely to be found indoors than outdoors they come from various sources including furniture cleaning products cosmetics paint and human respiration the world health organization advises that prolonged exposure to volatile organic compounds so-called VOCs can cause severe health risks also poor ventilation and confined spaces is associated with increased risk of infection with airborne viruses we cannot see these dangers suspended in the air but our sensors make the invisible visible sciocense designed an innovative technology to ensure the air we breathe indoors is fresh safe and clean our sensors detect hazardous VOCs and unpleasant odors they track air quality and humidity levels in indoor air to guarantee health safety and comfort sciocense environmental sensors combine perfectly with any ventilation purification or air conditioning system together they make sure that fresh air can replace polluted or stale air a perfect marriage of nature and science sensor technology which restores the air you breathe to the way nature made it sciocense sensing tomorrow's world