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Outdoor monitoring solutions

Outdoor Monitoring Solutions Catalogue

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Introduction

Over recent years, the need for better air quality has become clear: 99% of the world population is exposed to pollution levels exceeding the WHO recommendations. But as the need for clean air rises, so do the challenges that come with monitoring and mapping outdoor air pollution.  

To tackle those challenges, Airscan partnered with Kunak for outdoor air quality monitoring. Leveraging Airscan expertise and Kunak Technology, we offer tailored solutions to address sector-specific challenges and problematics. All the sensors include maintenance and calibration, ensuring reliability and accuracy throughout in the long term.

Partner

In all our endeavours, we partner with the best only. We are proud to say that for our outdoor monitoring solutions, we have partnered with Kunak. Together, we’re able to provide the best possible air quality services for your organization.

Awards and recognitions:

Award-winning technology

Real-time measurements

Remote calibration

Adaptable to your needs

Qualified and experienced experts

Projects

Outdoor Air Quality Monitoring device for the Pure Cities project with Belfius.
A Kunak and Airscan Air Quality Monitoring Device at Port Autonome de Cotonou (PAC)

Who Is Kunak?

Kunak is the most advanced solution for outdoor air quality measuring. Their award-winning sensors offer reliable, accurate and real-time measurements.

Air Quality monitoring Solutions 

Sensors

Each project has its specific needs. Airscan will develop with you the best measurement strategy and select the relevant pollutants out of a wide range of options

CO
NO
O₃
H₂S
HCI
CO₂
NO₂
SO₂
VOC
NH3
CH₄
PM1
PM2.5
PM4
PM10
TSP
TPC
TEMPERATURE
DEW POINT
HUMIDITY
ATMOSPHERIC PRESSURE

Sensors

Each project has its specific needs. Airscan will develop with you the best measurement strategy and select the relevant pollutants out of a wide range of options:

CO
NO
O₃
H₂S
VOC
CO₂
NO₂
SO₂
NH3
CH₄
HCI
PM1
TPC
TSP
PM2.5
PM4
PM10
TEMPERATURE
DEW POINT
HUMIDITY
ATMOSPHERIC PRESSURE

Real-time visualisation and reporting

Real-time visualisation, data analysis and (automated) reporting are crucial to make and evaluate decisions.  

Airscan offers different solutions for real-time visualisation and reporting of measurements. Together with you, Airscan experts will select the right tool and add its expertise to analyse, understand and ultimately change pollution behaviour. 

Outdoor Air Quality Monitoring device for the Pure Cities project with Belfius.
A Kunak and Airscan Air Quality Monitoring Device at Port Autonome de Cotonou (PAC)

Expertise and Maintenance

Calibration and maintenance of sensors is crucial to assure data accuracy. Airscan offers a complete range of on-site and remote services to get the most out of your outdoor air quality monitoring stations:

  • Remote calibration service
  • Sensor replacement and recycling
  • Calibration against Airscan gold standard equipment
  • Training on sensor use and calibration
  • Ad-hoc support for data analysis and analysis

Sectors and applications

Airscan supports organisations and companies in the following key sectors:

  • Smart & Sustainable cities 
  • Industry 
  • Ports and Airports 
  • Construction

Smart & Sustainable Cities

Create healthy urban spaces by monitoring air pollution.
More info

Ports and Airports

Help create a cleaner future by controlling Industrial emissions.
More info

Industry

Monitor transport emissions and noise.
More info

Construction

Improve the sustainability of construction projects by measuring air quality.
More info

Interested in outdoor monitoring solutions?

Get in touch
outdoor air quality monitoring station. Airscan helps cities and organizations by analyzing and improving their air quality and reporting this back to them.

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Carbon Monoxide (CO)

Carbon monoxide (CO) is a colorless, odorless, and toxic gas produced by incomplete combustion of fuels like gasoline, wood, and natural gas. Common sources include vehicles, generators, and heating appliances.

Thresholds

  • WHO: Max 9 ppm over 8 hours
  • OSHA: Max 50 ppm over 8 hours
  • Dangerous levels: 400+ ppm can be life-threatening
    CO detectors typically alarm at 50–100 ppm to warn early.

Impact

CO reduces oxygen in the body by binding to hemoglobin, causing:

  • Mild exposure: Headaches, nausea, fatigue
  • High exposure: Dizziness, unconsciousness, death
  • Enclosed spaces increase risk, especially for vulnerable individuals.

Prevention

  • Use CO detectors
  • Ensure good ventilation
  • Maintain appliances
  • Never run engines indoors

Nitric Oxide (NO)

Nitric oxide (NO) is a colorless gas mainly emitted from combustion processes such as vehicle exhaust, power plants, and industrial activities. While NO itself is less harmful than NO₂, it quickly reacts in the air to form nitrogen dioxide (NO₂) and ozone (O₃), contributing to smog and poor air quality.

Thresholds

There are no direct air quality limits for NO alone, but NOx (NO + NO₂) emissions are regulated.

  • OSHA workplace limit: 25 ppm over 8 hours
    In urban areas, NO levels can rise near heavy traffic or industrial zones.

Impact

NO has limited direct health effects, but it leads to the formation of NO₂ and ozone, which cause respiratory irritation, asthma, and lung damage. It also contributes to acid rain and climate-related air pollution.

Prevention

  • Reduce vehicle emissions through public transport, EVs, and cleaner fuels
  • Enforce industrial emission controls
  • Support air quality monitoring to detect and manage NOx hotspots
  • Promote energy efficiency to lower combustion-related emissions

Ozone (O₃)

Ozone (O₃) is a secondary pollutant formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react under sunlight. While ozone in the upper atmosphere protects us from UV rays, ground-level ozone is a major component of smog and harmful to health.

Thresholds

  • WHO guideline:
    • 100 µg/m³ (≈50 ppb) over 8 hours
  • Exceeding this level can trigger health warnings, especially during hot, sunny days in urban areas.

Impact

Ground-level ozone irritates the respiratory system, causing coughing, throat irritation, chest tightness, and worsens asthma and lung diseases. Long-term exposure can reduce lung function and increase the risk of respiratory infections. O₃ also harms plants and crops, reducing agricultural yields.

Prevention

  • Limit vehicle emissions and promote public transport
  • Control industrial VOC and NOx emissions
  • Avoid outdoor activities during high ozone alerts
  • Support policies that reduce fossil fuel use and urban smog

Hydrogen Sulfide (H₂S)

Hydrogen sulfide (H₂S) is a colorless gas with a strong rotten egg smell. It is produced by the decay of organic matter, industrial processes like petroleum refining, and natural sources such as volcanic eruptions and swamps.

Thresholds

  • WHO guidelines:
    • 10 ppm for short-term exposure (up to 30 minutes)
    • 0.1 ppm for long-term exposure to avoid health effects
  • OSHA workplace limit:
    • 20 ppm for an 8-hour workday
      Exposure to 100 ppm or higher can lead to immediate life-threatening effects.

Impact

H₂S is highly toxic and can cause:

  • Low exposure: Eye irritation, headaches, and nausea
  • Moderate exposure: Difficulty breathing, dizziness, and coughing
  • High exposure: Loss of consciousness, respiratory failure, and death
    Long-term exposure can lead to neurological damage and chronic respiratory issues.

Prevention

  • Install H₂S detection systems in industrial and residential areas
  • Ensure proper ventilation in areas with potential H₂S exposure
  • Use personal protective equipment (PPE) in high-risk environments
  • Regularly maintain and inspect equipment that may release H₂S

Hydrochloric Acid (HCl)

Hydrochloric acid (HCl) is a colorless, pungent gas that is highly corrosive. It is primarily emitted from industrial processes, including chemical manufacturing, metal processing, and oil refining.

Thresholds

WHO guidelines:

  • 1 mg/m³ (≈0.88 ppm) for long-term exposure
  • Short-term exposure limits: 5 ppm over 15 minutes

 

OSHA workplace limit:

  • 5 ppm for 8-hour workday
    Higher concentrations (above 50 ppm) can cause severe health effects.

Impact

Exposure to HCl can cause:

  • Low exposure: Irritation to the eyes, skin, and respiratory tract
  • Moderate exposure: Coughing, chest tightness, and difficulty breathing
  • High exposure: Severe lung damage, airway swelling, and chemical burns
    Prolonged exposure can lead to chronic respiratory issues and damage to lung tissue.

Prevention

  • Use HCl gas detectors in industrial settings
  • Ensure proper ventilation in areas where HCl is used or emitted
  • Provide workers with protective equipment such as respirators, gloves, and goggles
  • Regularly maintain and inspect equipment that could realease HCl

Carbon Dioxide (CO₂)

Carbon dioxide (CO₂) is a colorless, odorless gas that is a major contributor to climate change. It is primarily produced by burning fossil fuels (such as coal, oil, and natural gas), deforestation, and industrial activities. While CO₂ is a natural component of the Earth’s atmosphere, human activities have significantly increased its levels.

Thresholds

OSHA workplace limit:

  • 5,000 ppm for an 8-hour workday

WHO guidelines:

  • 1,000 ppm is the recommended indoor air quality limit for general comfort

Dangerous levels:

  • >5,000 ppm may cause headaches, dizziness, and fatigue
  • >40,000 ppm is immediately life-threatening.

Impact

While CO₂ is not directly toxic at typical concentrations, elevated levels can lead to:

  • Low exposure: Mild symptoms like fatigue, dizziness, and difficulty concentrating
  • High exposure: Severe respiratory issues, shortness of breath, and even asphyxiation in confined spaces.

CO₂ is a major greenhouse gas and contributes to global warming, leading to rising temperatures, sea-level rise, and extreme weather events.

Prevention

  • Reduce CO₂ emissions by transitioning to renewable energy sources
  • Implement energy efficiency measures in industries and households
  • Promote carbon capture technologies
  • Afforest and reforest to sequester CO₂
  • Support public transportation and electric vehicles to reduce fossil fuel burning