Multifunctional device reduces space requirements and facilitates routine maintenanceFlange dimensions as per DIN 24557 T2Air breather with integrated liquid level and temperature monitoringFilling port with quick couplingSampling port with quick couplingIn the connection schematic of an air breather as per DIN 24557 T2, this device provides all essential features for oil tanks within the smallest space for systems, which require an individual selection of the size of the tank top return filter. The compact design reduces the space requirements, installation and procurement costs and facilitates routine maintenance.