Elastomeric particle having an electrically conducting surface, a pressure sensor comprising said particles, a method for producing said sensor and a sensor system comprising said sensors

A sensor system, comprising:

• at least one first pressure sensor element comprising:
• a non-conducting elastomeric portion,
• a plurality of particles having a size in the range of 0.1 to 250 μm comprising a non-conducting elastomeric body having an electrically conducting surface, said particles being arranged as at least one conducting particle layer on said non-conducting elastomeric portion, and further, when said at least one first pressure sensor element is subjected to pressure, the relative positions of the particles arranged as the at least one conducting particle layer change, thereby changing the impedance of the sensor element,
• a first electrode electrically connected to a first portion of the at least one conducting particle layer, and
• a second electrode electrically connected to a second portion of the at least one conducting particle layer;
• and
• at least one second pressure sensor element comprising:
• a resistive element providing a conduction path,
• a first electrode, and
• a second electrode which, in a quiescent state, is spaced from said first electrode by a non-conducting elastomeric material having one or more conducting layers, but when said pressure sensor element is subjected to a pressure, the second electrode is arranged to contact said first electrode through the one or more conducting layers or said resistive element.