Using R and RStudio to Develop a Linear Regression Correction Algorithm
Saturday, Nov 25, 2023
This is the continuation of the previous post called How we use Linear Regression to Drastically Improve Humidity Sensor Accuracy on using a linear regression model to improve the accuracy of relative humidity.
Read MoreWhy do I sign and add a thank you card for every air quality monitor we sell?
Sunday, Nov 12, 2023
More than a year ago, we started to put a small thank you card into each of the air quality monitors we sell.
Read MoreHow we use Linear Regression to Drastically Improve Humidity Sensor Accuracy
Friday, Oct 13, 2023
In August this year we applied an algorithm to improve the relative humidity (RH) accuracy measured in our particulate matter (PM) sensor.
Read MoreTaking A Stand Against Poor Air Quality
Monday, Oct 9, 2023
Can one person affected by massive air pollution truly make a difference? To find out, read below true story! End of September Achim received below email from Victor:
Read MoreWhy we Wrote the AirGradient Manifesto
Sunday, Oct 1, 2023
In case you haven’t read our Manifesto yet, please do so to better understand our thoughts below. From the start AirGradient was different.
Read MoreAre our Articles Disguised Ads?
Tuesday, Sep 26, 2023
I’m active in discussions on Hacker News and regularly submit articles there. For anyone reading this that doesn’t know them, Hacker News is a popular news aggregator and discussion forum primarily for tech related news.
Read MoreAir Quality Monitors from USD 169 to 6k use the same low-cost PM Modules
Sunday, Sep 24, 2023
A few weeks ago, I wrote quite a popular blog post titled “Air Quality Monitors: When Paying More Does Not Get You More Accuracy” with the key takeaway that the accuracy of PM2.
Read MoreShould we Pay for Clicks?
Sunday, Sep 17, 2023
At AirGradient we are on a mission to bring accurate and more affordable air quality monitoring to as many people as possible.
Read MoreThe Climate Change Monitor
Saturday, Aug 26, 2023
Since June, the wildfires in Canada have devastated an area three times larger than previous years and emitted a huge amount of particulate matter, travelling into the US and triggering health alerts by the EPA.
Read MoreLow Cost CO2 Sensors Performance Outdoors Close to Reference Grade Instruments
Thursday, Aug 17, 2023
We are working with researchers at the University of Cambridge on outdoor CO2 monitoring using low-cost NDIR sensors. We replaced one of the PM modules of the Open Air with a SenseAir NDIR CO2 sensor.
Read MoreWhat we Learned Making a Plastic Injection Mold with a Chinese Mold Maker
Saturday, Aug 12, 2023
For our air quality monitors we have now worked with three different mold makers in China and learned a lot. I would like to share our experiences and give some tips.
Read MoreOur Open Source Open Hardware Vision
Tuesday, Aug 1, 2023
From the start and being heavily affected by air pollution ourselves, we want to maximize the impact our air quality monitors have.
Read MoreYou might NOT own the Data of your Air Quality Monitor
Monday, Jun 26, 2023
We at AirGradient are on a quest to democratize air quality monitoring with our open source, open hardware and open data approach.
Read MoreThe link between Climate Change and Air Pollution
Wednesday, May 17, 2023
With record breaking temperatures and depressing news about accelerated growth in air and oceanic temperatures, our planet is not in a good shape.
Read MoreHealth Impacts Of Air Pollution Across the Life Course
Wednesday, Apr 19, 2023
Nearly everyday we learn about new negative health impacts from air pollution, particularly from fine particles like PM2.5 and for quite some time, I wanted to make a list of all these impacts with link to studies with evidence.
Read MoreAir Quality Monitors: When Paying More Does Not Get You More Accuracy
Wednesday, Apr 12, 2023
Typically, a higher product price should correlate with better quality, features and/or performance. Take for example computer CPUs: The higher the cost of the CPU, the better the performance.
Read MoreReading Temperature and Humidity from Plantower PMS5003T
Monday, Apr 10, 2023
We use the PMS5003T version for our outdoor monitor Open Air which includes an integrated temperature and humidity sensor. If you use the Arduino Sketch from the AirGradient Arduino library you need to patch the PMS library to get these values.
Read MoreWhy We Joined 1% For The Planet
Tuesday, Apr 4, 2023
AirGradient started as a volunteer project to help a school in Northern Thailand monitor the air quality in classrooms during the highly polluted “burning season”.
Read MoreThe Hidden Cost of Air Quality Monitoring
Monday, Mar 27, 2023
Over the last few months, one of the largest air quality monitoring manufacturer in the world has increasingly crippled their free data plan to the point that their free API does basically no longer work and forces people to upgrade to a paid plan.
Read MoreLow Cost CO2 Sensors Comparison: Photo-Acoustic vs NDIR
Tuesday, Mar 14, 2023
When it comes to low cost CO2 sensors, there are basically three different methods to measure CO2. Estimated CO2 (eCO2) through TVOC sensors NDIR sensors Photo-acoustic sensors Estimated CO2 (eCO2) through TVOC sensors - not recommended - The first method via TVOC sensors is extremely unreliable.
Read MoreLicensing and Monetization of our Open Source Air Quality Monitors
Wednesday, Mar 8, 2023
All the AirGradient’s founders have been affected by the severe air pollution in Southeast Asia, and from the start we have worked with disadvantaged communities and provided them with affordable and high-quality air quality monitoring.
Read MoreOur Stories and Beliefs
Wednesday, Feb 15, 2023
We started as a volunteer project in a school in Northern Thailand, monitoring the dangerously high air pollution levels in classrooms during the so-called “burn season” which adversely affects peoples’ respiratory health.
Read MoreAirGradient TVOC Monitoring Survey Results
Monday, Jan 30, 2023
Total volatile organic compounds (TVOCs) are emitted as gases from certain solids or liquids. VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects.
Read MoreInstall the Arduino Software for the ESP32-C3
Wednesday, Jan 4, 2023
For the new AirGradient monitors we use the ESP32-C3-MINI microcontroller. This tutorial explains you how to set up the Arduino IDE for this microprocessor in order to flash the software.
Read MoreWhen Mimi is Better than Mini or When a Clone is Better than the Original?
Friday, Dec 16, 2022
Imagine a scenario where something that is termed ‘fake’ is actually better than the ‘original’. Sounds crazy right? This is the situation we found ourselves in at AirGradient a few weeks ago.
Read MoreLaunching the Open AirGradient Outdoor Monitor
Thursday, Dec 15, 2022
Launching the AirGradient Outdoor Monitor As many of you probably know, we have been working hard on an open hardware outdoor air quality monitor for quite some time.
Read MoreGood Hardware Takes Time- The Journey of the AirGradient DIY Kit Production
Wednesday, Jul 13, 2022
This week we are completing shipment of the first batch of AirGradient DIY Pro Kits (formerly called DIY v3 Kits) to early customers that ordered them around four months ago.
Read MoreAirGradient DIY Pro Kit Built Instructions
Wednesday, May 4, 2022
These instructions are for the people who ordered our first batch of the new DIY kit with the professional enclsosure. The instruction assume that you have already built a normal AirGradient DIY kit and thus primarily focus on the differences to the default DIY Kit.
Read MoreBreathe Safe Air Blog
Tuesday, Jan 19, 2021
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“.
Read MoreIndoor Air Quality Covid 19 Transmission Risk Indicator
Saturday, Jan 9, 2021
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.
Read MoreThe making of our new DIY enclosure
Wednesday, Oct 28, 2020
With the first version of our DIY board we developed a simple 3D printable enclosure with a wall mount that looks like this:
Read MoreCO2 Traffic Light to Reduce Covid-19 Transmission Risk
Wednesday, Oct 28, 2020
The WHO and leading health authorities agree that increased ventilation is a critical factor in reducing COVID-19 transmission in schools.
Read MoreInstall the Arduino Software and D1 Mini
Sunday, Oct 4, 2020
For all the AirGradient for Education build instructions we use very similar components and the same microcontroller, the Wemos D1 Mini.
Read MoreAirGradient DIY Display
Sunday, Oct 4, 2020
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.
Read MoreUse the Real-time Outdoor Activity Risk (ROAR) Guideline to complement your school’s AQI policy
Tuesday, Aug 11, 2020
Most international schools base their AQI policies on the US AQI standard that defines six bands of air quality from “Good” to “Hazardous”.
Read MoreBook Review: Nicholas and his incredible Eyesight
Saturday, Aug 1, 2020
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.
Read MoreWhy Air Quality is such a Successful Marketing Opportunity – a look at Maslow’s Hierarchy of Needs
Tuesday, Jun 30, 2020
Can you imagine a prestigious school without toilets? It is very interesting to look at the core marketing messages of private schools.
Read MoreDesign your School’s Air Quality Management to be a Growth and Profit Maker
Tuesday, Jun 23, 2020
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.
Read MoreAir Purifier vs. Positive Pressure Fresh Air System – an unfair Battle?
Monday, Mar 30, 2020
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.
Read MoreAir Quality at Schools – A Holistic Approach
Thursday, Feb 20, 2020
Air pollution is a prevalent issue that has severely impacted the health and wellbeing of schools in certain regions around the world.
Read More8 Student Experiments to Measure Air Quality
Sunday, Feb 16, 2020
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.
Read MoreWe Measured the CO2 Level in a Classroom. This is What We Found Out.
Friday, Feb 7, 2020
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.
Read More6 Ways to Improve Air Quality in Classrooms
Friday, Feb 7, 2020
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.
Read MoreLiving in an Area with High Air Pollution? Consider Positive Pressure Systems.
Wednesday, Jan 8, 2020
A positive pressure system (PPS) in your house is probably the best solution if you live in a highly polluted area.
Read MoreAir Quality – Selected Resources
Saturday, Dec 28, 2019
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.
Read MoreHow to write a School Policy on Air Quality
Wednesday, Nov 20, 2019
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.
Read MoreClassroom and indoor CO2 Standards compared; A Look around the World
Monday, Feb 27, 2017
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.
Read MoreIkea Vindriktning Air Quality Sensor Review and Accuracy
Monday, Feb 27, 2017
Ikea recently came out with a range of air purifiers and also an air quality sensor. The Vindriktning does not have a display but shows the air quality data in the form of a traffic light with red, yellow and green LEDs.
Read More
Case Study: 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.
Download Case Study