Sensor patch for attachment to an adhesive surface of a base plate for an ostomy appliance, the sensor patch having a first side and a second side , wherein the adhesive surface of the base plate is adapted for attachment of the base plate to a skin surface of a user, the sensor patch being adapted to form a stomal opening with a centre point, the stomal opening being configured to allow passage of output through the stomal opening and into an ostomy pouch attached to the base plate , the sensor patch comprising: - a sensor assembly (100, 100', 100", 100′′′) comprising a plurality of electrodes including a first electrode and a second electrode for forming a first sensor , the sensor assembly (100, 100', 100", 100′′′) having a first sensor side and a second sensor side , and at least a first part of the plurality of electrodes being exposed on the first sensor side and at least a second part of the plurality of electrodes being exposed on the second sensor side , - a first adhesive sensor layer forming the first side of the sensor patch , where a primary first side of the first adhesive sensor layer is adapted for attachment to the skin surface of the user when the sensor patch is used in a first configuration, and where the primary first side of the first adhesive sensor layer is adapted for attachment to the adhesive surface of the base plate when the sensor patch is used in a second configuration, and - a second adhesive sensor layer forming the second side of the sensor patch , where a primary second side of the second adhesive sensor layer is adapted for attachment to the skin surface of the user when the sensor patch is used in the second configuration, and where the primary second side of the second adhesive sensor layer is adapted for attachment to the adhesive surface of the base plate when the sensor patch is used in the first configuration. - a sensor assembly (100, 100', 100", 100′′′) comprising a plurality of electrodes including a first electrode and a second electrode for forming a first sensor , the sensor assembly (100, 100', 100", 100′′′) having a first sensor side and a second sensor side , and at least a first part of the plurality of electrodes being exposed on the first sensor side and at least a second part of the plurality of electrodes being exposed on the second sensor side , - a first adhesive sensor layer forming the first side of the sensor patch , where a primary first side of the first adhesive sensor layer is adapted for attachment to the skin surface of the user when the sensor patch is used in a first configuration, and where the primary first side of the first adhesive sensor layer is adapted for attachment to the adhesive surface of the base plate when the sensor patch is used in a second configuration, and - a second adhesive sensor layer forming the second side of the sensor patch , where a primary second side of the second adhesive sensor layer is adapted for attachment to the skin surface of the user when the sensor patch is used in the second configuration, and where the primary second side of the second adhesive sensor layer is adapted for attachment to the adhesive surface of the base plate when the sensor patch is used in the first configuration. <EOS>