A monitor device for an ostomy system comprising an ostomy appliance with a base plate having a first adhesive layer with a proximal side configured for attachment of the base plate to the skin surface of a user, the first adhesive layer having a stomal opening with a center point, the monitor device comprising: a processor; memory; a first interface connected to the processor and the memory, the first interface configured for obtaining ostomy data from the base plate coupled to the first interface, the ostomy data comprising primary leakage ostomy data from a primary electrode set of the base plate and secondary leakage ostomy data from a secondary electrode set of the base plate; and a second interface connected to the processor, wherein the processor is configured to: - obtain primary leakage parameter data based on the primary leakage ostomy data; - obtain secondary leakage parameter data based on the secondary leakage ostomy data; characterised in that the processor is further configured to: - detect presence of fluid on the proximal side of the first adhesive layer in a primary sensing zone based on the primary leakage parameter data, the primary sensing zone arranged in a primary angle space from the center point of the first adhesive layer; - detect presence of fluid on the proximal side of the first adhesive layer in a secondary sensing zone based on the secondary leakage parameter data, the secondary sensing zone being separate from the primary sensing zone and arranged in a secondary angle space from the center point of the first adhesive layer; - in accordance with a detection of presence of fluid in the primary sensing zone, transmit a primary leakage monitor signal comprising monitor data indicative of presence of fluid in the primary sensing zone via the second interface; and - in accordance with a detection of presence of fluid in the secondary sensing zone, transmit a secondary leakage monitor signal comprising monitor data indicative of presence of fluid in the secondary sensing zone via the second interface. a processor; memory; a first interface connected to the processor and the memory, the first interface configured for obtaining ostomy data from the base plate coupled to the first interface, the ostomy data comprising primary leakage ostomy data from a primary electrode set of the base plate and secondary leakage ostomy data from a secondary electrode set of the base plate; and a second interface connected to the processor, wherein the processor is configured to: - obtain primary leakage parameter data based on the primary leakage ostomy data; - obtain secondary leakage parameter data based on the secondary leakage ostomy data; - obtain primary leakage parameter data based on the primary leakage ostomy data; - obtain secondary leakage parameter data based on the secondary leakage ostomy data; characterised in that the processor is further configured to: - detect presence of fluid on the proximal side of the first adhesive layer in a primary sensing zone based on the primary leakage parameter data, the primary sensing zone arranged in a primary angle space from the center point of the first adhesive layer; - detect presence of fluid on the proximal side of the first adhesive layer in a secondary sensing zone based on the secondary leakage parameter data, the secondary sensing zone being separate from the primary sensing zone and arranged in a secondary angle space from the center point of the first adhesive layer; - in accordance with a detection of presence of fluid in the primary sensing zone, transmit a primary leakage monitor signal comprising monitor data indicative of presence of fluid in the primary sensing zone via the second interface; and - in accordance with a detection of presence of fluid in the secondary sensing zone, transmit a secondary leakage monitor signal comprising monitor data indicative of presence of fluid in the secondary sensing zone via the second interface. - detect presence of fluid on the proximal side of the first adhesive layer in a primary sensing zone based on the primary leakage parameter data, the primary sensing zone arranged in a primary angle space from the center point of the first adhesive layer; - detect presence of fluid on the proximal side of the first adhesive layer in a secondary sensing zone based on the secondary leakage parameter data, the secondary sensing zone being separate from the primary sensing zone and arranged in a secondary angle space from the center point of the first adhesive layer; - in accordance with a detection of presence of fluid in the primary sensing zone, transmit a primary leakage monitor signal comprising monitor data indicative of presence of fluid in the primary sensing zone via the second interface; and - in accordance with a detection of presence of fluid in the secondary sensing zone, transmit a secondary leakage monitor signal comprising monitor data indicative of presence of fluid in the secondary sensing zone via the second interface.