Amazon on Wednesday added the Smart Air Quality Monitor to its lineup of home gadgets. Available for preorder now for $70, the new indoor air quality sensor is expected to start shipping next month.

Amazon has unveiled an Alexa-enabled air quality sensor. The $70 monitor alerts you to a range of harmful allergens and dust in your home. It can also pick up on the presence of carbon dioxide, and ...

If you want to add humidity and temperature sensors to your home automation sensor, you can — like [Maker’s Fun Duck] did — buy some generic ones for about a buck. For a dollar, you get a little ...