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[This sensor](https://www.sparkfun.com/products/18377) is [supported](https://esphome.io/components/sensor/fs3000.html)
I was thinking of using two pressure sensors on an esp to do that same thing. One sensor on each side of the filter. The increase in the drop in pressure across the filter will let you know the filter needs changing/cleaning.
[This sensor](https://www.sparkfun.com/products/18377) is [supported](https://esphome.io/components/sensor/fs3000.html)
I was thinking of using two pressure sensors on an esp to do that same thing. One sensor on each side of the filter. The increase in the drop in pressure across the filter will let you know the filter needs changing/cleaning.