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Oxygen Sensors

On of the most important parameters to check in a place where there is nitron, both in liquid or in vapour phase, is the percentage of the oxygen in the atmosphere.

The breathable air is composed by 19,5% of oxygen. The nitrogen used to keep low temperature, is constantly subjected to evaporation. The nitrogen gas is colourless and odourless and is able to rapidly substitute the oxygen in the environment leading to a complete saturation.


The asphyxia problems are several and diverse based on the percentage of oxygen left in the environment:

  • 19% - 15% (02): difficulties in simple movements, these symptoms can be more evident in people with cardiomyopathy;
  • 15% -12% (O2): shortness of breath, rapid heart-beating, weak motor coordination;
  • 12% - 10% (O2): dizziness, cognitive deficit, blue colour of the mouth;
  • 10% - 8% (O2): sickness, faintness, mental damage;
  • 8% - 6% (O2): after 4-5 minutes in these conditions the 100% of the people survive after particular treatments. After 6 minutes, only the 50% of the people survive. After 8 minutes, no people are alive;
  • 4% (O2): death only after 40 seconds.


In order to monitor the oxygen level in BioRep, there is a wide set of oxgygen sensors localized in several points of the biorepository, able to read oxygen level in the atmosphere. If the parameters of the oxygen are to low, the alarm is activated and the emergency ventilation starts system starts.

BioRep offers little hand-held oxygen sensor for operator in the biorepository. They are practical and easy to manipulate.