You can now pre-order Black Carbon Modules!
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The skyline of a city using Clarity’s air quality monitoring system to measure pollutant levels.

Limited-time discounts on wildfire monitoring!

In recognition of our inclusion on the EPA Fire & Smoke Map, we are offering limited-time discounts on wildfire-oriented air quality monitoring equipment.

Learn about discounts!
The skyline of a city using Clarity’s air quality monitoring system to measure pollutant levels.

The Multi-Gas Module is available to order!

The Clarity Multi-Gas Module expands the capabilities of the Node-S, enabling real-time measurement of CO, O₃, NO₂, NO, and NOx — five key pollutants that impact air quality and public health. Learn more!

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The skyline of a city using Clarity’s air quality monitoring system to measure pollutant levels.

It's our 10th anniversary!

Over the past decade, Clarity has become a global leader in air quality monitoring, tallying 500 million+ air quality measurements with 10,000+ unique sensor deployments in 250+ cities in over 85 countries. Learn more about our 10th anniversary here.

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Air quality measurement trusted by:

Why Sensing-as-a-Service℠ for air pollution monitoring?

No separate software purchase. No add-on warranties. No unexpected expenses.
With one upfront service, we’re giving you the affordability, flexibility, and autonomy to eliminate all of your air quality blind spots.

Hardware -
Hardware

Easily deployed air monitoring devices

Self-powered Clarity Node-S air quality monitoring hardware measures PM2.5 and NO2 and serves as a platform for additional modules that measure Wind, Black Carbon, and Ozone.

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Clarity's user friendly air quality management dashboard - Learn more
Cloud

Cloud data management & visualization

Air quality measurements and air sensor network status are easily accessible in real-time via Clarity’s user-friendly Dashboard, REST API, and OpenMap.

Learn more about Clarity Cloud
Dedicated Environmental Project Manager to help you with your Air Quality Management project. Learn more.
Support

Expert air quality project support

An experienced Environmental Project Manager to help you define a project plan and guide you through Collocation and Calibration of your devices.

Meet our team

Hear about Breathe London's clean air movement

The future of air quality monitoring is modular

Clarity's modular ecosystem unlocks flexibility for your air quality monitoring network. With Modules that attach in seconds, it's simple to upgrade your air quality monitoring network to measure additional air pollutants over time.

Expand capabilities by mixing and matching add-on modules like Wind Module, Ozone Module, Black Carbon Module, and more.

Wind & Meteorological Module. Get real-time air pollutants measurements with Clarity solutions.
MODULE

Black Carbon Module

The Black Carbon Module enables you to differentiate PM from natural sources from fossil fuel combustion sources like vehicles, helping apportion pollution to known local emitters.
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Wind & Meteorological Module. Get real-time air pollutants measurements with Clarity solutions.
MODULE

Multi-Gas Module

The Clarity Multi-Gas Module expands the capabilities of the Node-S, enabling real-time measurement of CO, O₃, NO₂, NO, and NOx — five key pollutants that impact air quality and public health.
Learn more
Wind & Meteorological Module. Get real-time air pollutants measurements with Clarity solutions.
MODULE

Wind & Met Module

The Wind & Met Module reveals ambient temperature, pressure, and relative humidity as well as wind speed and direction data to help determine pollution sources and their impacts on your community.
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Trusted by governments, communities, and businesses

Who we work with

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Trusted by governments, communities, and businesses in 85+ countries around the world

Explore featured customer projects using the interactive map below.

Brazzaville, Republic of Congo

A network of Clarity Node-S sensors was installed in collaboration between Columbia University & Marien Ngouabi University. They are some of the first air quality monitoring devices installed in the region and will help to better understand and characterize air quality.

Accra, Ghana

Jundiaí, Brazil

Monitoring will be performed with two Clarity Node-S, with funding provided through a donation from NB Capital Investimentos and Consultoria LTDA. The two monitoring stations that will be moved to different sites across the city.

Santiago, Chile

Insite has deployed a network of Node-S sensors in the vicinity of Santiago and are evaluating opportunities for further deployment.

Bogota, Colombia

Broward County, Florida

Broward County Florida schools use Clarity air quality sensors to monitor local pollution and engage students in analyzing data for projects.

Los Angeles, California

Los Angeles Unified School District deployed 200 Node-S sensors to create the largest air quality monitoring network of any school system in the United States.

Denver, Colorado

Clarity’s Node-S provides the DDPHE an affordable means of addressing community concerns and identifying hotspots, and has enabled the DDPHE to improve the resolution of their air quality monitoring network.

Sydney, Australia

Clean Air Schools Program: After a successful pilot program with UNSW, Clarity Nodes will be placed in classrooms and playgrounds to put accurate, real-time data at the fingertips of all Australians to enable them to make better decisions about their local environment and health.

San Francisco, California

Brightline Defense was awarded funding to deploy a network of 15 air quality monitoring devices in several San Francisco neighborhoods, which expanded to 19 because of increased community demand.

Perth, Australia

The Royal Automobile Club of Western Australia decided to take a stand against air pollution by investing in a cutting-edge air quality monitoring network to keep members and the public informed with 200+ Clarity Node-S air quality sensors.

Richmond, California

Groundwork Richmond installed a network of several dozen Node-S to monitor pollution from freeways and a nearby refinery with funding from the AB 617 Community Air Grants Program.

Manila, Philippines

Clarity deployed a pilot network of Clarity Node-S devices throughout Metro Manila in partnership with Clean Air Asia and the Environment Management Bureau (EMB) to demonstrate the potential for low-cost sensors to support improved air quality management practices.

Bengaluru, India

A network of 30 Node-S air quality sensors was deployed at strategic locations frequented by vulnerable populations, with an emphasis on schools and hospitals. Project implemented by the GCHA & HEAL.

Bishkek, Kyrgyz Republic

50 Clarity Node-S air quality monitors were installed in Bishkek to help improve public health and quality of life. The project, funded by the Asian Development Bank, seeks to improve air quality in the capital and areas around the city with significant pollution levels.

Kathmandu, Nepal

KMC officially unveiled the Kathmandu Metropolitan Air Quality Monitoring Dashboard on World Environment Day (June 5, 2025), with an initial network of 18 Clarity air quality sensors.

Ar-Rayyan, Qatar

A network of Clarity Node-S sensors was colocated with reference equipment at the Qatar Environment & Energy Research Institute to provide air quality data for analysis and evaluate the potential for expansion of further indicative monitoring in Quatar.

Helsinki, Finland

The Finnish Institute for Atmospheric and Earth System Research used a network of Clarity Node-S sensors to develop a virtual sensor network capable of providing reliable air quality information.

Paris, France

The City of Paris installed a 150-sensor network of Clarity Node-S to better understand air quality around schools in the French capital. Partial funding provided by Bloomberg Philanthropies.

London, United Kingdom

In 2021, London installed more than 100 Clarity air sensors at London hospitals, schools, and other sensitive locations to complement existing high-quality reference-grade monitors and enable measurement of ambient air pollution at the neighborhood level.

Breathe Jersey

Thrive Jersey received a grant from the Government of Jersey to purchase and install air quality monitors across the Island, a project known as Breathe Jersey.

Frequently Asked Questions

What is Clarity Movement Co., and what do they offer?

Clarity Movement Co. is an environmental technology company providing a complete Sensing-as-a-Service solution for ambient air quality monitoring. Their offering includes solar-powered Node-S air quality sensors, a cloud-based data platform, and expert support—empowering governments, businesses, schools, and communities to measure air pollution reliably and affordably.

How does Clarity’s Sensing-as-a-Service℠ air quality monitoring model work? How does it differ from traditional air quality monitoring?

Clarity’s Sensing-as-a-Service℠ bundles sensors, software, data connectivity, and support into a single subscription. You deploy Node-S air pollution sensors, and Clarity handles data transmission, calibration, and ongoing maintenance. There are no hidden costs—just fast, simple setup and real-time data via the Clarity Cloud.

How accurate and reliable are Clarity’s low-cost air quality sensors?

Clarity sensors are calibrated using remote and local methods to ensure decision-grade accuracy. Their patented Remote Calibration system aligns low-cost sensor data with regulatory standards, and ongoing updates (e.g. wildfire calibration models) keep data accurate even in extreme conditions. Third-party evaluations show strong performance compared to reference monitors.

Where are Clarity’s air quality monitoring solutions being used?

Clarity sensors are deployed in 85+ countries and 250+ cities, collecting billions of data points globally. Projects include Breathe London, Los Angeles Unified schools, and Bishkek, Kyrgyzstan. Clarity supports governments, NGOs, researchers, and industry.

What makes Clarity’s approach to air quality monitoring different from traditional methods?

Traditional monitors are expensive and sparse. Clarity offers dense sensor networks that are easy to deploy (solar-powered, cellular-enabled) and deliver hyperlocal data in real time. The fully integrated system removes complexity—hardware, software, and calibration come together in one seamless platform.

Who typically uses Clarity’s air quality monitoring systems, and how do they benefit?

Clarity serves cities and regulators, communities, schools, industries, and researchers. Customers—from the Mayor of London’s office to small rural counties—use Clarity’s data to inform policy, protect public health, manage compliance, and engage the public.

What are the most common air pollutants?

The most common ambient (or outdoor) air pollutants are Particulate Matter (PM 10 and PM2.5), Ozone (O3), Nitrogen Dioxide (NO2), Carbon Monoxide (CO), and Sulfur Dioxide (SO2).

Particulate Matter (PM10, PM2.5 and PM1) is a common & impactful air pollutant resulting primarily from combustion, including industrial activities, vehicles, & wildfires. Particulate matter differs greatly in its concentration and composition across the world but has a significant impact on public health in most countries. It is classified according to the size of its particles, the smaller categorization of which — PM2.5 — accounts for much of the pollutant’s detrimental effect on human and environmental health. Although the effects of PM are well studied, it remains in excess of benchmark levels for a large majority of the world’s population, prompting the need to take action in order to achieve cleaner air. Learn more about Particulate Matter here.

Ozone or O3, occurs both in the upper atmosphere and at the ground level. While it is a helpful substance in the upper atmosphere — forming a layer around the Earth to protect the planet’s surface from the sun’s ultraviolet rays — ozone acts as a pollutant at the ground level, causing negative effects on human and environmental health. Also known as ambient or tropospheric ozone, ground-level ozone is the primary component of the type of air pollution commonly referred to as smog. It is a colorless gas that is composed of three atoms of oxygen. Learn more about Ozone here.

Nitrogen dioxide (NO₂) is a subtype of a class of air pollutants known as nitrogen oxides (NOx). It primarily results from fuel combustion from sources such as motor vehicles and industrial activities. Nitrogen dioxide has significant impacts on human and environmental health, most notably when it comes to respiratory and cardiovascular health. Learn more about Nitrogen Dioxide here.

Carbon Monoxide (CO) is an odorless, colorless, tasteless gas formed by the incomplete combustion of fuel. It is very dangerous as it can displace the oxygen in the human body and lead to deadly poisoning. It is produced from fuel-burning appliances. Learn more about Carbon Monoxide here.

Sulfur Dioxide (SO2) is an air pollutant composed primarily of sulfur and oxygen. It results from combustion of coal, oil or diesel. It causes harmful effects on the lungs.

Can Clarity’s sensors detect wildfire smoke or specific air pollutants?

Yes — Clarity’s air quality sensors are specifically designed to detect fine particulate matter (PM2.5), which is a major component of wildfire smoke. In addition, Clarity offers modular pollutant measurement capabilities including nitrogen dioxide (NO₂), ozone (O₃), and black carbon, allowing for tailored monitoring of specific air pollution sources such as traffic, industry, or biomass burning.

Is Clarity’s air quality monitoring data publicly accessible or open-source?

Clarity provides the tools to make air quality data publicly accessible through its OpenMap air quality data platform, which enables organizations to share real-time data with communities, stakeholders, and the general public. While the data is not open-source by default, it can be transparently published and easily embedded into websites, dashboards, or public health initiatives.

Why is air quality monitoring important for communities and businesses?

Monitoring air quality empowers communities to protect public health and helps businesses reduce risk, demonstrate environmental responsibility, and ensure compliance with regulations. With real-time data, decision-makers can respond quickly to pollution events, track long-term trends, and implement evidence-based strategies that improve air quality and quality of life.

What causes air pollution?

There are two types of air pollution causes: natural sources and human-caused (AKA  anthropogenic) sources.

Natural events can cause air pollution such as wind that carries dust and gases in locations with little green cover to absorb it, living beings release gases such as oxygen from plants during photosynthesis or methane from cattle but also volcanic eruptions, smoke, and ashes from wildfires.

Human-caused air pollution comes from various human activities including burning fossil fuels, agriculture, transportation, electricity, and industries. These activities result in emissions of carbon dioxide, nitrogen oxides, sulfur dioxide, volatile organic compounds, and particulate matter.

What are the health impacts of air pollution?

Air pollution affects nearly every area of the human body — from head to toe. It is a major environmental risk factor for a slew of diseases, from Alzheimer’s disease to lung cancer to osteoporosis, and can significantly lower lifespan and quality of life. Air pollution accounts for extensive damage to public health, while its exposure impacts everyone, its damage is not distributed equally. Children, elderly individuals, those with pre-existing conditions, and those living in low socioeconomic neighborhoods or environmental justice communities bear a disproportionate burden of its impacts — emphasizing the need to protect vulnerable populations by taking better care of our air quality.

In general, the wide-reaching damage caused by air pollution is thought to be a result of the systemic inflammation it causes. It can impact various body parts, including the eyes, brain, lungs, heart, stomach, liver, bones, and reproductive organ. Learn more about the health impact of air pollution here.

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