Abstract: A time-resolved measurement of blood pressure, arterial elasticity, pulse wave, pulse wave transit time and pulse wave velocity, a cardiac output, and/or changes in cardiac output of a human or animal body, using a pressure sensor unit while being pressed against the skin. The unit is an air and/or gas pressure sensor, and is configured to change at least one electrical conductance and/or resistance when subjected to pressure. The unit has at least two conductor trace arrays, particularly conductor trace networks, and a functional polymer that is compressed when subjected to pressure, and produces and/or alters contact between the conductor trace arrays. Alternatively, the unit has at least two conductive layers with a gap therebetween, and is configured such that the gap becomes compressed when subjected to pressure, and/or such that the capacitance of the assembly composed of the two conductive layers is changed as a result.