Safecast Outdoor Air Quality Monitoring Station

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  • $ 1,000.00

This beta program is at capacity. If you are interested in air quality monitoring, please go to and learn about the SolarCast device.

Are you curious about the quality of air that you breathe? Be one of the first to use Safecast's Air Quality Monitoring Station in the field and be on the forefront of one of the largest air quality collection projects on the planet. Read more about the Safecast project here.


  • Measures particulate (in PM10, PM2.5 and PM1.0)* and environmental calibration data (temperature and humidity).
  • Upload data to an open and freely accessible community map.
  • Scientific-grade sensors and GPS-logged data collected and shared worldwide.

* Particulate Matter (PM) affects more people than any other pollutant. The major components of PM are sulfate, nitrates, ammonia, sodium chloride, black carbon, mineral dust and water. It consists of a complex mixture of solid and liquid particles of organic and inorganic substances suspended in the air. The most health-damaging particles are those with a diameter of 10 microns or less, (≤ PM10), which can penetrate and lodge deep inside the lungs. Chronic exposure to particles contributes to the risk of developing cardiovascular and respiratory diseases, as well as of lung cancer.

Kit Options

This device is available as a kit or some assembly required.

* Assembly required
Time to build: 2-4 hours (including soldering time)

* Some assembly required (pre-soldered)
Time to build: 1 hour

This device is designed to be a static sensor, permanently installed in a single location with fixed power and internet for the data consumption. This model measures particulate (in PM10, PM2.5 and PM1.0) and environmental calibration data (temperature and humidity). The particulate sensor is made by Alphasense and trusted by the scientific community.

Important note: the data collected with these devices is for beta testing purposes only and will help Safecast develop the production version.

Beta Tester Objectives

The beta period is an exciting time to participate in the Safecast Air Quality program. During the beta period, you will join a small group of enthusiastic beta testers from around the world. Beta testers will get to:

  • Assemble the device and become familiar with the sensors and components.
  • Collect data for a minimum of 3 months and share with the Safecast beta community.
  • Provide feedback on the build process and device usage.


  • Ability to build the kit or have someone help you.
  • Access to a location outside that is protected and safe for your device and accessible by you to check on the device. *These devices are not for indoor deployment.
  • Wifi accessible.
  • Make software updates from time to time.

About Safecast

Safecast is a global environmental sensor network enabling people to collect radiation and air quality readings and freely use and share the data collected.

Started after the Fukushima earthquake in 2011, Safecast has the largest collection of radiation data ever available spanning every continent on the globe. The project is driven by volunteers and citizen scientists everywhere, just like you.

Safecast believes that environmental data should be open, easy to access and easy to understand. They provide an open, free and public map of all submitted environmental data readings that can be accessed via browser or Safecast:drive apps.

1. Where must I be located to participate?

Anywhere. The more locations participating the better.

2. Can an organization or school participate?

Yes, anyone is welcome to participate in the beta testing program as long as they meet the requirements.

3. The cost of this kit is higher than the bGeigie Nano. Why?

This is an entirely different device than the bGeigie Nano with different senors and this is a beta kit.

4. How often can I move this device to get readings from multiple places?

For the length of the beta testing program - 3 months - we would like you to choose one location and leave your device there. 

5. What is being measured with this device?

This device measures airborne particulate in sizes PM10, PM2.5 and PM1.0.

6. When will I get my kit?

We will ship it to you within 2 business days.

7. Can I join after the program begins?

Yes, we will accept beta testers on a rolling basis

8. Can I participate in the discussion even if I don't have a kit?

Yes, here is a link to the discussion group.

Option - PCB requires soldering. For your convenience, the PCB comes with the SMT components soldered onto the board. You will start building the device at this step.

22 Ohm resistor (SM0805) Surface Mount
10K resistor (SM0805) Surface Mount
20k resistor (SM0805) Surface Mount
12k resistor (SM0805) Surface Mount
4.7k resistor (select via I2C requirements) Surface Mount
0.1uf ceram. cap. (SMO805)
Shrouded header, 5x2
2x2 pin array
Breakaway header, male pins, 36 pos
Screw terminal block, 2-pos
6-pin JST XH connector
Switch, 4-direction with center push
Slide switch
9 pos female header
Adafruit Ultimate GPS Breakout
2mm 10pin XBee Socket
8 pos female header
Monochrome 1.3” 128x64 OLED graphic display
3.3V, 600mA step down voltage regulator
Teensy 3.1 (box came with 3.2)
Teensy header
14 pos female header
5 pos female header
7 pos female header
Resistor array, isolated
Schmitt buffer
Adafruit temperature humidity breakout
P-Channel MOSFET (SOT-323)
PCB with surface mounts
Custom Cables for the OPC-N2 (Particle counter)
Spacers (3/16" diameter, 7/16" length, female-female with 2-56 thread).
Screws (2-56 pan head phillips machine screw 3/16" length
Silver screws
Backup battery for GPS real-time clock
Alphasense Sensor OPC-N2 (Particulate Sensor)
Serpac Case
Template for drilling holes in case
5v USB Power Adapter
SD card for OpenLog
Acrylic output plate and PCB Shield.
3M VHB Foam Tape - Adhesive on Both Sides 
Aluminum non-corrosive Mesh to cover Serpac holes 


Beta tester Catherine Saldutti of Edu Change has successfully put her kit together!


If you are an institution or similar that requires the use of a purchase order, please contact

Air Quality Lessons from National Center for Atmospheric Research. These lessons are for middle and high school students and align with NGSS and CCSS standards.


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