I will have a Particle Boron device and I will use 4 analog sensors: CO, O, S02, NO2 for air quality monitoring.
Ex: The carbon monoxide (CO): https://www.spec-sensors.com/wp-content/uploads/2016/10/ULPSM-CO-968-001.pdf , The ozone (O): https://www.spec-sensors.com/product/ultra-low-power-analog-sensor-module-ozone/
, they says NOTE: High impedance output requires a buffer to connect to any
measurement device., my questions are:
- is Vgas the output and can be connected directly to Boron, or will I need something else??
- is it linear, I mean I understand Vgas will be the output and it will be giving from 0 to 3V and I think “0” represents “0ppm” and 3V will be “500ppm”, so if I have 1.5V of output, will be 250ppm? or should I take the equations from the paper?
3)Could I connect an I2C ADC like https://www.adafruit.com/product/1085 to each sensor?
Thanks in advance.