Air Quality: Carbon Dioxide and Carbon Dioxide Sensors (CCS811, MG811, SCD30, SCD40, SCD41)

День тому

Welcome to my video on air quality, carbon dioxide and carbon dioxide sensors especcally the SCD30 and SCD41! 🌬️🔬
Air quality is a topic that concerns us all, but how well do we truly understand what's happening in the air around us? In this video, I'll delve deeper into the world of air quality, with a special focus on carbon dioxide.
🌍 Importance of Air Quality:
First, we'll take a look at why air quality matters and how it impacts our well-being and health, especally the effects of CO2.
🔍 The carbon dioxide sensors:
In this video we will also take a closer look on a few CO2 sensors and explain how this sensor works to provide accurate data about CO2 levels in the air.
📊 Interpreting the Data:
Collecting data from sensors is fantastic, but how do we effectively utilize it? I'll provide some tips on how we can use the information provided by these sensors to make informed decisions about our environment, potentially enhancing our quality of life.
Whether you're a tech enthusiast, an environmental lover, or simply curious about the air we breathe, this video will give you a deep insight into the world of air quality monitoring.
Don't forget to hit the thumbs up, share the video, and subscribe to my channel for more intriguing content! Thank you for joining me as we delve into the captivating world of air quality and sensor technology. 🌬️🌍
#AirQuality #CarbonDioxide #SCD30 #SCD41 #SensorTechnology #Environment #Health
Book (english version)
WSN & IoT (Basics, protocols and applications):
a.co/d/5yfTIuJ
ISBN-13: 979-8851358074
Book (deutsche Version)
WSN & IoT (Grundlagen, Protokolle und Anwendungen):
amzn.eu/d/hAbTgD0
ISBN-13: 979-8648512061
00:00 Introduction
00:28 The pillars for a healty life
01:16 Measurement chain
02:12 Air composition
03:22 Historic CO2 level
04:24 Health effects of CO2
06:01 CO2 warning levels
06:56 Breathing
08:22 Sensor ScioSense CCS811
08:40 Sensor DFRobot MG811
09:34 Sensor Sensirion SCD30
11:40 Sensor Sensirion SCD4X
13:33 Sensor Sensirion SCD30 test
16:34 Sensor Sensirion SCD41 test
21:00 Datasheet Sensirion SCD4X
22:37 Outro

КОМЕНТАРІ: 10

@Baltrum2307 2 місяці тому

Thanks for your informative Video! Does the CCS detect VOC and calculate an CO2 equivalent? From my understanding VOC don’t include CO2, or am I wrong there? Greetings :)

@wsniot 2 місяці тому

The CCS is a MOX-sensor which react to changes in electrical conductivity caused by the presence of volatile organic compounds. CO2 is not a VOC. Normally with other factors MOX-sensors can estimate the CO2 value (eCO2), but from my experience the estimation is not good and with the CS811 we got the same graph for CO2 like for VOC when we measure over a longer periode. So it seems they use here only a factor for estimation.

@Baltrum2307 2 місяці тому

Thanks again for that fast response and your understandable answer! My goal is actually to monitor VOC values, because I was monitoring high levels of VOC with another smarthkme device. Do you have any data on how reliable the CCS can detect VOCs? (I know that VOC value is really not so meaningful because you can’t say which gas exactly is detected. But I wanted to verify whether there is really a high VOC pollution in my rooms)

@wsniot 2 місяці тому

@@Baltrum2307 The VOC value itself isn't really meaningful, but it's good enough for a relative comparison. Measure the VOC value in a non-contaminated place and compare it with your room. The concentration is usually higher at the point of origin, for example the floor covering, wall or sofa, wherever the VOCs come from. And which VOC it is cannot be determined with the CSS811.

@roysigurdkarlsbakk3842 3 місяці тому

I got some SCD40 from china and they work, ish, but I want to create something that is meant to be used inside and having to take it outside or into a somewhat controlled atmosphere once a week, won't do. So, I tried to turn off autocalibration and rather do a forced calibration instead. This works, ish, but with the standard probe time of every four seconds, the measured rate of co2 rises quickly over a few days. So I tried to enable power saving, reducing the probe time down to every 30 seconds. I generally probe this every minute, so not an issue. This reversed the problem, by drifting downwards instead of upwards and after they reached zero, they now crash if I try to forcely calibrate them. Have you seen any of this or do you have any idea if it's possible somehow to find a co2 detector that can last for some time without having to be recalibrated all the time? I know such things exist, you can get them in shops, but I have no idea what they use internally. Thanks for the good work! roy

@wsniot 3 місяці тому

But to use it inside under most conditions is normally not a problem as long there is at least once a week anykind of ventilation and no person or animal inside. As I know the most other CO2 sensors are not deliver good absolut values. Calibration is difficult. A lot cheap CO2 detection systems using an analog sensor and comparing just relative values. For fire detection for example you will have a high increase in a short time. Actually I dont know what they use in more modern air quality devices but I guess they also expect that the device is at least once in a specific time period exposed to the minimum CO2 value from around 400 ppm.

@kozlovskyi 6 місяців тому

Scd30 had two tubes, one as reference, to eliminate the need in calibrations. Am I wrong?

@wsniot 6 місяців тому

The SDC30 and SCD41 support both automatic self-calibration (ASC) and manual recalibration (FRC). With ASC, the sensor must be exposed to a well-ventilated room or outdoors and the lowest reading is estimated at 400 ppm. FRC is a manual calibration with a reference value. For the SCD4X, the sensor should be in an environment with about 400 ppm at least once a week. The SCD30 should left overnight. I don't know if they really use different algorithms. With the SCD4X ASC is used as standard with the SCD30 FRC. Haven't checked if the values from a factory calibrated SCD30 are already good and how long they stay acceptable. A valid long term test and comparison would be interesting.

@EmilNicolaiePerhinschi 5 місяців тому

came to see something about CO2 sensors, got a load of propaganda :(

@wsniot 5 місяців тому

The chapters are marked. You can always skip the part you don't like. However, I don't understand why you want to measure CO2 if you don't want to deal with the meaning of the values. I merely explained a few basics that are currently the general scientific consensus and also provided the data with sources. These basics are important in order to be able to calibrate and interpret the sensor values. If you don't believe the historical data or doubt the significance of the values, you don't need to bother with a CO2 sensor, because you will also have to doubt it. For example, these are calibrated on the basis of this data.