The temperature sensors of iMETOS are free of any maintenance as long as they are used in a proper way
and the cables are not damaged. The relative humidity sensor is affected by pollution in dependence of
the severity of the pollution. In clean air this sensor will give accurate readings for 3 and more years but
in polluted air it may give inaccurate high readings after some years of use. In this case the sensor has
to be changed for a new calibrated one.