A sensor system for use with an automated guided vehicle, comprising: a sensor housing being attached to the AGV; and a sensor board being at least partially located within the sensor housing and including a plurality of sensor units electronically coupled to a sensor control module, wherein each of the sensor units interacts with an indicating system that follows a pre-determined path along the ground and each of the sensor units includes: a sensor array having a plurality of sensor elements, the sensor elements take sensor readings regarding the position of the AGV with respect to the indicating system; a conditioning circuit being electronically coupled to the sensor array and having a plurality of filter/amplifiers, the filter/amplifiers process the sensor readings from the sensor array; and a conversion circuit being electronically coupled to the conditioning circuit, the conversion circuit converts the sensor readings from the conditioning circuit for transmission to the sensor control module, characterised in that the sensor system is configured to store and use sensor readings and the following equation to determine a center of field value that represents the center or centroid of a corresponding magnetic field produced by the indicating system: CG: ≡ ∑ n = 1 N m n ⋅ r G n ∑ n = 1 N m n where: is the center of field value; (m n) is a sensor reading for sensor element (n); (r Gn) is a lateral distance from a fixed point on the AGV for sensor element (n); and is the number of sensor elements included in the calculation. a sensor housing being attached to the AGV; and a sensor board being at least partially located within the sensor housing and including a plurality of sensor units electronically coupled to a sensor control module, wherein each of the sensor units interacts with an indicating system that follows a pre-determined path along the ground and each of the sensor units includes: a sensor array having a plurality of sensor elements, the sensor elements take sensor readings regarding the position of the AGV with respect to the indicating system; a conditioning circuit being electronically coupled to the sensor array and having a plurality of filter/amplifiers, the filter/amplifiers process the sensor readings from the sensor array; and a conversion circuit being electronically coupled to the conditioning circuit, the conversion circuit converts the sensor readings from the conditioning circuit for transmission to the sensor control module, characterised in that the sensor system is configured to store and use sensor readings and the following equation to determine a center of field value that represents the center or centroid of a corresponding magnetic field produced by the indicating system: CG: ≡ ∑ n = 1 N m n ⋅ r G n ∑ n = 1 N m n where: is the center of field value; (m n) is a sensor reading for sensor element (n); (r Gn) is a lateral distance from a fixed point on the AGV for sensor element (n); and is the number of sensor elements included in the calculation. a sensor array having a plurality of sensor elements, the sensor elements take sensor readings regarding the position of the AGV with respect to the indicating system; a conditioning circuit being electronically coupled to the sensor array and having a plurality of filter/amplifiers, the filter/amplifiers process the sensor readings from the sensor array; and a conversion circuit being electronically coupled to the conditioning circuit, the conversion circuit converts the sensor readings from the conditioning circuit for transmission to the sensor control module, characterised in that the sensor system is configured to store and use sensor readings and the following equation to determine a center of field value that represents the center or centroid of a corresponding magnetic field produced by the indicating system: CG: ≡ ∑ n = 1 N m n ⋅ r G n ∑ n = 1 N m n where: is the center of field value; (m n) is a sensor reading for sensor element (n); (r Gn) is a lateral distance from a fixed point on the AGV for sensor element (n); and is the number of sensor elements included in the calculation. is the center of field value; (m n) is a sensor reading for sensor element (n); (r Gn) is a lateral distance from a fixed point on the AGV for sensor element (n); and is the number of sensor elements included in the calculation.