The Ambu Blue Sensor R has a large measuring area that ensures an optimal signal during stress tests and medium to long term applications. It has a highly conductive wet gel that guarantees optimum skin contact without the need for aggressive skin prep. The completely latex free R has a soft and flexible foam backing that is extremely gentle on a patients skin and instant and superior adhesion that is not only very effective but kind to the patients skin. The sensor area has been carefully manufactured from silver/silver chloride that ensures traces are as stable as possible and the offset connector greatly reduces movement artefact.