Resource Library

Read more about our products and services: Articles, Build Instructions, Case Studies and Manuals.

COVID-19 Transmission Risk at Schools - What Parents Should Ask their Principal

Social-distancing and mask-wearing are important tools for reducing the COVID-19 transmission risk in schools, but one critical less discussed factor is to ensure that there is adequate air ventilation inside the classrooms.

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Why Air Quality is such a Successful Marketing Opportunity – a look at Maslow’s Hierarchy of Needs

Can you imagine a prestigious school without toilets? It is very interesting to look at the core marketing messages of private schools.

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Design your School’s Air Quality Management to be a Growth and Profit Maker

In most cases, schools approach the topic of air quality from a risk and health perspective and thus seeing it purely as a necessary evil/cost to fulfill international air quality standards and regulations.

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We Measured the CO2 Level in a Classroom. This is What We Found Out.

In the city of Chiang Mai in Northern Thailand, many adults and children alike suffer from the air pollution caused by the annual smoke season.

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Indoor Air Quality Covid 19 Transmission Risk Indicator

The risk of Covid 19 infections depends highly on the characteristics of the indoor air, especially the rate of ventilation and the temperature and humidity inside the room.

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Classroom and indoor CO2 Standards compared; A Look around the World

Unlike with PM 2.5 where there are already quite established global standards, the standards and guidelines around CO2 are less known and well worth a more detailed look.

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Air Purifier vs. Positive Pressure Fresh Air System – an unfair Battle?

We have made a comparison test between a positive pressure fresh air system (PPS) and a standalone purifier on the effectiveness of bringing the ambient PM 2.

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Use the Real-time Outdoor Activity Risk (ROAR) Guideline to complement your school’s AQI policy

Most international schools base their AQI policies on the US AQI standard that defines six bands of air quality from “Good” to “Hazardous”.

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CO2 Traffic Light to Reduce Covid-19 Transmission Risk

The WHO and leading health authorities agree that increased ventilation is a critical factor in reducing COVID-19 transmission in schools.

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Air Quality at Schools – A Holistic Approach

Air pollution is a prevalent issue that has severely impacted the health and wellbeing of schools in certain regions around the world.

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Air Quality – Selected Resources

Here is a list of links to resources that we recommend to learn more about air quality in general and also in regards to schools.

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Breathe Safe Air Blog

The other day a customer asked me what kind of air pollution masks I would recommend and during my research, I came across a great blog called “Breathe Safe Air“.

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Book Review: Nicholas and his incredible Eyesight

As part of our newly launched AirGradient for Education initiative, we want to review educational material to help schools increase awareness on the important topic of air quality.

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8 Student Experiments to Measure Air Quality

As pollution is becoming more rampant worldwide, educators are deeply encouraged to teach students about the science of pollution and what they can do to care for the environment.

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6 Ways to Improve Air Quality in Classrooms

Air pollution has always been a universal concern, but one that is often swept under the rug by many schools. Children’s health is at risk due to bad air quality, especially those who live in rural regions.

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Living in an Area with High Air Pollution? Consider Positive Pressure Systems.

A positive pressure system (PPS) in your house is probably the best solution if you live in a highly polluted area.

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How to write a School Policy on Air Quality

Virtually any school that operates in an environment with air pollution issues should have a detailed policy on how to protect its students from these hazards.

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AirGradient DIY Sensor

Build your own air quality sensor measuring PM2.5, CO2, Temperature and Humidity.

Build Instructions

Frequently asked questions about the DIY sensor

Due to the close proximity of the temperature sensor (SHT) to the other components on the board it is impacted by heat radiation. To compensate for this, you can either add a correction factor in the code or move the sensor further away from the board. Our new enclosure will have a small extra compartment for this.
Yes, it is relatively easy to add a TVOC sensor, for more information please see our article on TVOC integration below for more information.
The sensor board and enclosure is not waterproof and should not get wet. However many people use it outside in a rain protected area, e.g. under an over-hanging roof and it works just fine.
You can signup for a free account and connect your DIY sensors with the follwing link . When you come to the page about sensor connection, please click on the tap called 'DIY'. People that buy our DIY kit from us, will get one year free premium upgrade on the DIY plan. To get that upgrade, please send us a message.
Our DIY kits come with one year premium subscription on the DIY plan. After this we currently charge USD 1.50 per sensor per month for the DIY plan.
Yes you can buy kits from us with all the required components. For more information click on below article about DIY kits.
The AirGradient DIY Kits

When we started to give away the AirGradient PCBs and only charged shipping costs, we got a lot of requests from builders about complete kits.

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AirGradient DIY Display

When we launched our indoor classroom monitoring with our professional sensors, one of the first feature request from teachers was to have a small display that would show the indoor and outdoor air quality.

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Install the Arduino Software and D1 Mini

For all the AirGradient for Education build instructions we use very similar components and the same microcontroller, the Wemos D1 Mini.

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The AirGradient DIY Sensor Enclosure

Just a quick shoutout that we have 3d printer files to print your own enclosure. It fits the DIY PCB perfectly and consists of a top and bottom part that snap together.

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The AirGradient DIY Sensor Wall Mount

We also developed a wall mount that fits to our sensor enclosure and snaps into its vents. It is quite easy to 3D print and a great addition to the enclosure.

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TVOC on the AirGradient DIY Sensor

There are small boards with the Sensirion SGP30 TVOC sensor that is pin compatible to the SHT30 temperature and humidity sensor that we already use on the board.

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Prem Tinsulanonda International School

Learn how Prem Tinsulanonda International School took a proactive approach to air quality and improved their growth rate


Children’s Pre-School Center (CPSC)

Learn how a child care center in California used our DIY sensor kit to build a powerful air quality solution

Quickstart Guide User

Short introduction into the AirGradient dashboard for new users

Quickstart Guide Administrators

Short introduction for administrators into the AirGradient sensor setup and users authorization

AirGradient Manual

Detailed manual for advanced features for users and administrators