{"id":237944,"date":"2021-03-14T13:35:19","date_gmt":"2021-03-14T12:35:19","guid":{"rendered":"https:\/\/emariete.com\/?p=237944"},"modified":"2023-11-25T11:08:47","modified_gmt":"2023-11-25T10:08:47","slug":"medidor-co2-sensor-mq-135","status":"publish","type":"post","link":"https:\/\/emariete.com\/en\/medidor-co2-sensor-mq-135\/","title":{"rendered":"CO\u2082 Meter with MQ-135 sensor (Don't miss it, it's not what it looks like)"},"content":{"rendered":"

In this article I am going to tell you what you need to do to set up a CO2 meter with one sensor MQ-135<\/strong> (sic). An easy and cheap tutorial (it's free).<\/p>\n\n\n\n

I hope that, if you are reading this article, it is because you have thought about build an easy and cheap meter with a MQ-135 sensor and an Arduino or ESP8266<\/strong>You have searched the internet and came up with this page.<\/p>\n\n\n\n

<\/p>\n\n\n\n

The sole objective <\/strong>of this page is that people who want to build a CO\u2082 meter with a MQ-135 sensor find this information AND DON'T DO IT!<\/strong><\/p>\n\n\n\n

The same title of CO\u2082 meter with an MQ-135 sensor is an incongruity in itself.<\/strong>read on to find out why.<\/p>\n\n\n\n

There are many projects that promise to measure CO2 but actually use it, as in this case, electrochemical sensors<\/strong> for general use for the detection of organic volatiles<\/strong> which not only measure CO2, but also all these gases together<\/span><\/strong>so that they really you don't know what you are measuring<\/span><\/strong>.<\/p>\n\n\n\n

These sensors they are not suitable for measuring CO2<\/strong>. These sensors measure all organic gases together<\/strong> (Ammonia, Nitrogen Dioxide, Alcohol, Benzene, Carbon Dioxide and Monoxide, Smoke, etc), so if there is someone who is throwing themselves hydroalcoholic gel<\/strong> or someone smoking<\/strong> or there is a source of combustion, such as a chimney, the measurements will be triggered. no way of knowing what is making them go off<\/strong>.<\/p>\n\n\n\n

The only parameter you could get with sensors like the MQ-135 would be a: \"Value in unknown units of something unknown in the air, which we do not know what it is or how much of it there is.<\/em>\"<\/strong>. As you can see, something very unhelpful<\/strong>.<\/p>\n\n\n\n

What a CO\u2082 meter has to do, as obvious as it may seem, is to measure CO\u2082, and to do so with as much CO\u2082 as possible. accuracy <\/strong>better.<\/p>\n\n\n\n

In case I haven't made it clear: DO NOT MOUNT A METER BASED ON THE MQ-135 SENSOR IF YOU WANT TO MEASURE CO\u2082!<\/strong><\/p>\n\n\n\n

I have written this article because many users have come to the Telegram group or have written in comments, full of excitement, because they had built a CO2 meter with the MQ-135<\/strong>but it was not working properly and they asked for help. The best help would be if they had read an article like this one.<\/strong>.<\/p>\n\n\n\n

If you really want to build a reliable, accurate CO2 meter that actually measures CO2, check out this tutorial:<\/strong><\/p>\n\n\n

\n\n
\n
A home CO2 meter with Wifi against the coronavirus: The CO2 Easy<\/a><\/blockquote>