Monitor de calidad del aire MQ-135

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/3500815/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&round=3&title=Estimaci%C3%B3n+experimental+de+CO&type=line&xaxis=Tiempo&yaxis=CO+estimado+%28ppm%29"></iframe>