KEYESTUDIO Pm2.5 Sensor Pm2.5 Air Particle Monitor for Arduino Mega 2560 Uno R3 Nano Micro Pro Mini Raspberry Pi

Is there detailed documentation available for how to interface this with Arduino?

How many of these can I connect to a single Arduino?

Can this sensor detect a specific thing that changes the air quality? like if the sensor were to suddenly have cigarette/vape/juul smoke blow onto it?

El producto contiene algún certificado de calidad de medición?