Measure C02 in your home, school or office!

Aranet4 is a wireless CO2, temperature, relative humidity and atmospheric pressure sensor designed for indoor environments. This small, unobtrusive, portable device easily conveys accurate real time measurements via its E-ink display and free Aranet4 app. 

Analyse your data and know the quality of the air your breathing. 

Aranet4 makes monitoring and maintaining healthy air quality easy and accessible. 


The perfect companion for indoor environments allowing you to monitor CO2 levels, temperature, relative humidity and atmospheric pressure.

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Why monitor CO2?

Indoor CO2 levels indicate how fresh the air your breathing is. The higher the level, the more germs inhaled with each breath. This increased amount of re-breathed air increases the risk of contracting covid-19 and other respiratory diseases.

Reduce Illness

Monitoring CO2 in an indoor space helps to prevent the spread of COVID-19 and other respiratory diseases. 

CO2 is a gas produced when we exhale so the higher CO2 in the room, the more you’re breathing the air that someone else has already exhaled. Monitoring CO2 level can therefore help to minimize infection risk by warning you when the air quality deteriorates.

Improve Cognitive Function

According to Harvard research, high CO2 levels can decrease your productivity, cognitive abilities and general wellbeing.

 Their studies found if the CO2 concentration in the room exceeds 1000 parts per million, your cognitive function decreases by 15%. Worse yet, if CO2 levels reach 1400 ppm, your cognitive abilities drop by a staggering 50%.

More of Harvard’s Research 


Why Aranet4?

What is the difference between Aranet4 HOME and Aranet4 PRO?


The ideal choice for monitoring air quality in one particular location at a time. 
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Best for multiple rooms and locations to constantly monitor the condition on premises. 
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Great device - highly recommended. Easy to setup and perfect for keeping me safe now that we're back into "no mask required" territory.
Sam B
Recent Customer