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SENSOR

PM1

PM1 measures the concentration of ultrafine particles smaller than 1 micron in

the air and provides insight into the smallest and most invisible pollution within a space.

See it in the dashboard →

What is PM1?

PM1 is the measurement of airborne particles with a diameter of less than 1 micron, typically expressed in micrograms per cubic meter (µg/m³). These particles are so small that they are invisible to the eye and can travel deep into the lungs, and possibly into the bloodstream. In commercial buildings, PM1 mainly comes from combustion sources such as traffic, smoke and cooking, as well as office equipment like laser printers. Measuring PM1 helps building, workplace and facility teams detect hidden particle pollution and see how well ventilation and filtration are working.

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Stop reacting. Start optimizing.

Gain complete visibility into your building operations, eliminate budget surprises,
and transition from "firefighting" to high-performance management.
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Built for facility mangers

Save time

→ Get a quick overview of your entire portfolio from anywhere

→ Prioritize worst-performing spaces first

→ Generate compliance reports in minutes, not hours
Stay ahead of problems

→ Real-time alerts when conditions exceed thresholds

→ Use trend data to predict and prevent issues

→ Fix problems before they become complaints
Seamless integration

→ Connect to your BMS for automated HVAC optimization
→  Receive alerts in Slack, Teams, or email
→  API access for custom dashboards and analytics

 
Easy to deploy and maintain

→ Fully wireless sensors, no complex cabling
→  Long battery life means minimal maintenance
→ Scale easily as your portfolio grows

 
● THE WHY 

Why does PM1 matter?

PM1 isn't just dust in the air. These are the smallest particles we measure, and their size makes them among the most harmful to occupant health.

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Protect occupant health


Because of their tiny size, PM1 particles can penetrate deeper into the body than larger particles, and are linked to respiratory and cardiovascular problems. Keeping PM1 levels low helps protect employees, students and visitors from long-term health effects.
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Uncover invisible pollution


PM1 can't be seen or smelled, so high levels often go unnoticed. Monitoring reveals when and where particles build up, whether from outdoor traffic, printers or kitchens, so you can take action before pollution affects the people in your building.
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Choose the right filtration


Not all filters are effective against the smallest particles. PM1 data shows how well your HVAC filters perform in practice, helping you choose the right filter class and confirm that your investment in cleaner air actually delivers.
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PM1 over time

Track ultrafine particle levels across rooms and buildings in real time. See when traffic, printers or cooking cause PM1 to rise and follow trends over time, so your team can improve filtration and keep the air clean for everyone inside.

 
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● GET STARTED

See PM1 levels in your buildings

Curious about the PM1 levels in your buildings? We'll show you what PM1 looks like in the Airthings dashboard. 

Get in touch
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Stop ventilating empty rooms

Our sensors detect when people are actually present. Integrate with your BMS to reduce HVAC run-time by up to 30%.

See how Toma saved 26% on energy bills ->

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Resolve complaints with facts

When a tenant claims air quality is poor, share a live link to the data. Prove your building is performing - or spot the exact issue instantly.


Explore dashboard ->

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