Water and hydrogen peroxide have a very
similar molecular structure, and they both affect the humidity of the air in which they are
present. HPP272 measurement makes a difference between the humidity caused by both
H2O2 vapor and water vapor, and the humidity caused only by water
vapor:
- Relative saturation is a parameter that indicates the humidity of the air caused by both H2O2 vapor and water vapor. When relative saturation reaches 100 %RS, the vapor mixture starts to condense.
- Relative humidity is a parameter that indicates the humidity of the air caused only by water vapor.
During H2O2 bio-decontamination processes, it is often important to monitor the possibility of condensation. For this purpose, it is not enough to know the level of relative humidity (RH), because RH only indicates the humidity caused by water vapor. The possibility of condensation is affected by the combined humidity of H2O2 vapor and water vapor, which is why you need to monitor relative saturation (RS).