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Honeywell HPMA115S0 Dust Sensor

This sensor board allows you to monitor particulates in the air in one small package. Connect it on your own or use a Particle Squared.

Price: $38

Particle Squared Air Quality Sensor Board

Particle Squared is for monitoring the air quality in inside. Plug in your Particle Mesh or Feather compatible board and go!

Price: $36