A magnetic field sensor arrangement (220; 240; 250; 320) for determining a signal magnetic flux generated by a signal magnetic field source (S1) in a manner which is substantially immune against a magnetic disturbance field, the magnetic field sensor arrangement comprising: - said signal magnetic field source (S1); - a first and a second magnetic flux concentrator forming an air gap; - a magnetic field sensor comprising a semiconductor substrate with a plurality of sensor elements; - the magnetic field sensor being configured for reducing an influence of said magnetic disturbance field, if present; characterized in that: - the first (201; 221; 251; 301) and the second (202; 222; 252; 302) magnetic flux concentrator are configured and arranged such that the air gap is formed between an exterior face of the first magnetic flux concentrator and an exterior face of the second magnetic flux concentrator, wherein the first and second exterior face define a first direction (X) of the air gap by a line of shortest distance between said exterior faces ; - the first and the second magnetic flux concentrator are configured for guiding a signal magnetic flux generated by the signal magnetic field source (S1) to and across the air gap substantially in the first direction (X); - the magnetic field sensor is arranged such that the plurality of sensor elements is arranged inside the air gap ; - the magnetic field sensor is configured for measuring a first signal (Bx) indicative of a first magnetic field component oriented in the first direction (X), and for measuring a second signal (Bz) indicative of a second magnetic field component oriented in a second direction (Z) substantially perpendicular to the first direction (X); - the magnetic field sensor is configured for correcting the first measured signal (Bx) by using the second measured signal (Bz) in order to reduce or eliminate the influence of the magnetic disturbance field, if present. - said signal magnetic field source (S1); - a first and a second magnetic flux concentrator forming an air gap; - a magnetic field sensor comprising a semiconductor substrate with a plurality of sensor elements; - the magnetic field sensor being configured for reducing an influence of said magnetic disturbance field, if present; - the first (201; 221; 251; 301) and the second (202; 222; 252; 302) magnetic flux concentrator are configured and arranged such that the air gap is formed between an exterior face of the first magnetic flux concentrator and an exterior face of the second magnetic flux concentrator, wherein the first and second exterior face define a first direction (X) of the air gap by a line of shortest distance between said exterior faces ; - the first and the second magnetic flux concentrator are configured for guiding a signal magnetic flux generated by the signal magnetic field source (S1) to and across the air gap substantially in the first direction (X); - the magnetic field sensor is arranged such that the plurality of sensor elements is arranged inside the air gap ; - the magnetic field sensor is configured for measuring a first signal (Bx) indicative of a first magnetic field component oriented in the first direction (X), and for measuring a second signal (Bz) indicative of a second magnetic field component oriented in a second direction (Z) substantially perpendicular to the first direction (X); - the magnetic field sensor is configured for correcting the first measured signal (Bx) by using the second measured signal (Bz) in order to reduce or eliminate the influence of the magnetic disturbance field, if present. <EOS>