The TraceDec contactless conductivity detector is based on two metal electrodes which are placed around the separation capillary, which can be of any non-conducting material (e.g. fused silica, PEEK , Teflon ). After an AC voltage is applied to the actuator electrode (left) the current passes the capillary wall, the detection gap between the electrodes inside the capillary, and back to the pick-up electrode (right).The signal is then further amplified and processed. Principles of Capacitively Coupled Contactless Conductivity Detection © Innovative Sensor Technologies GmbH 2015 No electrolyte contamination or electrode fouling. No detection window required. Flexible positioning of the detector. Works with even very small inner capillary diameters (CE).