Reducing the risk of COVID-19 contamination with the uHoo Air connected sensor


Faced with the very significant increase in the number of infected people and the saturation of health services, the authorities in several countries have decided to confine their populations in order to limit the spread of the SARS-COV2 virus.

Most contaminations take place in buildings because the virus is transmitted by air. Indeed, homes and professional premises are confined spaces that are conducive to the spread of viruses. Indoor air quality is an essential determinant of the conditions for virus transmission.

The uHoo Indoor Air Quality Sensor is an effective tool for preventing situations where there is a risk of virus transmission such as VID19.
Indeed, the uHoo Air is the only sensor connected to provide real-time interpreted information on the risks of virus propagation in the indoor environment. This information is based on the synthesis of certain IAQ parameters that are indicators of the conditions favorable to the survival of COVID-19 and its propagation by air.

What are the environmental conditions for viruses to survive? 

Temperature and humidity are the two most important parameters that determine the survival of viruses.
The virus contamination rate is significantly reduced at ambient temperatures around 20°C compared to low temperatures (4°C). Higher temperatures (30°C) make virus transmission ineffective.
Viruses remain infectious longer at humidity levels below 40% or above 80%.

"Viruses survive less time in ambient conditions around 20°C and 50% relative humidity."

How does poor indoor air quality promote the transmission of viruses?

Certain environmental conditions are more favorable for virus transmission, three parameters in particular are indicators of the risk of transmission of viruses such as COVID-19 :

  • CO2: carbon dioxide is emitted by breathing and accumulates in the indoor environment all the more quickly as the number of occupants is high. It is an indicator of containment and a CO2 level above 800 ppm indicates that the renewal of indoor air is insufficient. Ventilation and air renewal can reduce the viral load in the air and reduce the spread of viruses.
  • PM2.5: fine particles with a diameter of less than 2.5 µm (1/1,000,000 of a meter) can penetrate the respiratory tract to the pulmonary alveoli. The finer they are, the longer the particles remain suspended in the air. Viruses are microorganisms of the order of 0.1 µm in size that tend to cling and agglomerate on dust particles, providing them with a "means of transport".
  • NO2: Nitrogen dioxide is mainly produced by emissions from internal combustion engine vehicles.

Fine particles (PM2.5) and nitrogen dioxide (NO2) are irritating to the respiratory tract and the inflammation they cause diminishes the immune defenses and creates a breeding ground for the contamination of organisms by viruses.

"Air pollution and in particular indoor air pollution is recognized by health authorities as an aggravating factor in the health consequences of viral infections such as COVID-19".

How does the uHoo Air sensor inform you in real time about contamination risks?

The uHoo connected sensor measures indoor air quality parameters indicative of the ambient conditions favorable to virus survival (temperature and humidity) and transmission (CO2, PM2.5 and NO2).
From these 5 parameters, the uHoo algorithm calculates in real time a viral index that provides information on the risks of airborne virus propagation in the indoor environment.

"The uHoo sensor is the only one to offer a viral index to evaluate in real time the risks of virus propagation in buildings."

The uHoo Viral Index is a scale of virus transmission risk:

- An index between 1 and 3 (GOOD) indicates unfavorable conditions for the survival and/or transmission of viruses and therefore a low risk of contamination.  
- An index between 4 and 6 (AVERAGE) indicates moderate conditions of survival and/or transmission of viruses and therefore a significant risk of contamination.
- An index of 7 or 8 (BAD) indicates conditions favourable for the survival and/or transmission of viruses and therefore a high risk of contamination.  
- An index of 9 or 10 (SEVERE) indicates very favorable conditions for the survival and/or transmission of viruses and therefore a very high risk of contamination.  
Due to the current health situation, the uHoo sensor has become an indispensable tool to limit the spread of COVID-19 in collective work spaces such as offices and meeting rooms but also in all establishments receiving the public such as schools and nurseries, colleges, high schools, universities, hospitals, clinics, waiting rooms for doctors, hotels and restaurants, museums and administrations, shops...
The virus index is accessible to Android and iOS users.
Sources: Using Indoor Air Quality Data to Create the uHoo Virus Index

uHoo Connected IAQ Sensor

Connected sensor for indoor air quality measurement. Measurement of 9 indoor air quality parameters and Viral index. Order your IAQ Sensor