Invisible gases and particles in the air you breathe.

We breathe in and out over 20,000 times a day, without knowing whether — or which — substances are in the air, where and how they arise, what effects they have on us, and what limit values exist. We’ve gathered the information on limit values for gases, particles and pollutants in indoor air for you.

air-Q and air-Q radon air quality monitors

These substances affect your health and wellbeing — learn everything about the quality of the air you breathe

Here you can learn about invisible gases and particles in the air you breathe. We explain how the various substances and compounds arise and what effect they have on you. You’ll also get an overview of the often complex definition of limit values, for example from the Federal Environment Agency or the WHO. From this, recommendations follow on how you can sustainably improve your indoor air.

Measured values & sensors

All measured values and sensors at a glance

Click on a measured value to see details, limit values and the matching air-⁠Q variants.

Pollutant gases Custom Sensor Custom Sensor Environment Infrasound Infrasound Pollutant gases H₂ Hydrogen Pollutant gases VOC Volatile Organic Compounds Pollutant gases C₄H₈S Tetrahydrothiophene Climate T Air Temperature Climate Td Dew Point Pollutant gases NO Nitric Oxide Pollutant gases NO₂ Nitrogen Dioxide Pollutant gases SiH₄ Silane Pollutant gases H₂Se Hydrogen Selenide Pollutant gases H₂S Hydrogen Sulfide Pollutant gases SO₂ Sulfur Dioxide Environment O₂ Oxygen Environment Rn Radon Pollutant gases C₃H₆ Propylene Pollutant gases COCl₂ Phosgene Pollutant gases O₃ Ozone Pollutant gases PH₃ Phosphine Pollutant gases CH₄S Methanethiol / Methyl Mercaptan Pollutant gases CH₄ Methane Climate ρ Relative Humidity Climate φ Absolute Humidity Climate p Air Pressure Environment lx Light / Illuminance Environment Lp_max Noise Peak Level Environment Lp Noise Pollutant gases N₂O Nitrous Oxide (Dinitrogen Monoxide) Pollutant gases CO Carbon Monoxide Pollutant gases CO₂ Carbon Dioxide Pollutant gases C₄H₁₀ Isobutane Pollutant gases PID Industrial VOC Sensor Pollutant gases N₂H₄ Hydrazine Pollutant gases CH₂O Formaldehyde Pollutant gases HF Hydrogen Fluoride Pollutant gases F₂ Fluorine Particulates Particulate Matter Particle Count Particulate Matter Particle Count Particulates PM₁ – PM_2.5 – PM₁₀ Particulate Matter Pollutant gases C₂H₄O Ethylene Oxide Pollutant gases C₂H₆ Ethane Pollutant gases B₂H₆ Diborane Pollutant gases ClO₂ Chlorine Dioxide Pollutant gases Cl₂ Chlorine / Chlorine Gas Pollutant gases C₄H₁₀ Butane Pollutant gases HBr Hydrogen Bromide Pollutant gases Br₂ Bromine Pollutant gases HCN Hydrogen Cyanide Pollutant gases AsH₃ Arsine Pollutant gases NH₃ Ammonia Pollutant gases Alcohols Alcohols

air-Q air quality monitor

Monitor air quality, all air components, and environmental influences with the air-⁠Q. For your health and performance.

Order the air-⁠Q now