Peratech is developing an Electronic Nose using its award-winning Quantum Tunnelling Composite material. This new sensor technology detects the presence of volatile organic compounds (VOCs) very rapidly and can recover equally quickly, in a matter of seconds. QTC materials change their resistance when a force is applied and, in this case, the polymer content of the composite swells when exposed to VOCs. One form of Peratech’s sensor uses a granular type of QTC material that provides a high su...