Abstract: Electromagnetic sensing for use with ablation treatment devices are described. Generally, an elongate body may be configured for introduction into an esophageal lumen and a distal portion may be pivotably coupled to the elongate body such that actuation of the distal portion reconfigures the distal portion within a plane relative to the elongate body. The elongate body may define one or more openings along the distal portion and which are in fluid communication with a fluid port. A sensor may also be positioned near or at a distal end of the distal portion where the sensor is configured to communicate with an electromagnetic navigational system to determine a distance to an ablation catheter.