The present invention relates to a sensor arrangement to monitor at least one ambient parameter, the sensor arrangement comprising: a first layer exhibiting a first electrical conductivity, and at least a second layer exhibiting a second electrical conductivity different than the first electrical conductivity and being at least partially in direct contact with the first layer, wherein the first and the second layer in an initial configuration comprise different concentrations of a diffusible component, having an impact on the conductivity of the first and/or the second layer.