An exemplary sensor system for a fuel transport vehicle can comprise a fuel marker sensor positioned between a fuel storage chamber of the vehicle and an access valve for the fuel storage chamber of the vehicle. From signals, the statistical descriptive parameters are obtained and a map of its distribution is calculated. This enables fixed cutting stress on a portion of the solder wires to be cut with the first cutting blades and a portion of the solder wires to be cut with the second cutting blades at the same time to prevent deformation of the cut surface of the cut solder wires. A pressure sensor attached on a side wall of the pressure chamber detects pressure in the communicating path to determine pressure in the fuel vapor path.