SEN0437 Bare Conductive Printed Sensor DFRobot SEN0437 Bare Conductive Printed Sensor (Set of 3) are flexible paper sensors that have been screen printed using Electric Paint. These devices are perfect for quick testing, modifying, and integrating touch and proximity sensors. The DFRobot SEN0437 sensors are sealed with a water-proof varnish to protect from humidity and smudging. Sixteen exposed access nodes allow easy connection to capacitive electrodes, like those on the Touch Board, Pi Cap, and Light Up Board. Below are five ways to use the Printed Sensors.