Air Quality Sensor Board for Particle Mesh - PM2.5, VOC, eC02, Temperature & Humidity

Particle Squared
Using battery
With Dust Sensor

The Problem

You ever find yourself sneezing inside your home and wondering “What the heck?! What is making me sneeze?”

I had that same question.

After wildfires have ravaged parts of the USA and smog has loomed in our skies it’s become more important than ever to make sure you’re breathing clean air. Some folks may just go by an air purifier. But, how do you know it works? How do you know if it’s powerful enough to protect your whole space?

Like a scientist, you can test it with Particle Squared.

What is it?

Particle squared is an all-in-one air quality sensor for Particle and Feather based development boards (development board not included). It brings together a trio of sensors to give you as many data points as possible. That way, there won’t be anything missing when you go to measure the air inside your home or workplace.

Here’s what’s on board:

Particulate Sensing

The most important sensor is the Honeywell HPMA115S0 dust sensor (available as a purchase option). This sensor counts the concentration of potentially harmful particulates in the air. It can detect both large particles 10µm in diameter and smaller ones less than 2.5µm in diameter. These readings are known as PM10 and PM2.5 respectively.

Sensing Volatile Compounds

Second to that, is the AMS CCS811. This senses volatile organic compounds and eC02. These types of readings are useful in places where there may be combustion. (Think stoves, furnaces, etc) It can act as an early warning mechanism. That way you stay safe, happy and healthy!

Temperature and Humidity

Finally, the Silicon Labs Si7021 temperature and humidity sensor. These readings can be used on their own. Additionally they’re used by the CCS811 to compute an accurate TVOC and C02.

Flexible Power Sources

No outlet nearby where you want to measure? No problem!

You can easily plug in almost any lithium polymer battery to your Particle or Feather based board and use it immediately. Particle Squared has extra circuitry that allow you to use either USB or battery power. How great is that?

What are people saying about it?

I have a similar setup I build with sensors off Adafruit and have been thinking of designing my own PCBA to integrate all of them, this saves me the time! Thank you! - Nicholas J

Thank you for integrating them on a single Featherwing format! - D

I love what you did to measure the air quality. - C

The Logistics

Shipping is a flat 4 dollars anywhere in the USA. Shipping can be combined for multiple.

More info

Particle Squared is an all-in-one board based on the tutorial here.

Looking for a quick start? Learn how to use Particle Squared with Google Docs here

👉 Looking for the source? Get the hardware files and code here.

What's included:
  • 1x Particle Squared
  • 1x Dust Sensor (Add-on)
  • 1x Dust Sensor Cable (Add-on)
International? Email me.