Field device and method for replacing a sensor in a field device

A method for replacing a first sensor with a second sensor in a field device system configured to determine a process variable, each of the first and second sensor being provided with near field communication NFC functionality, the method comprising:

• connecting the second sensor to an initiation device and initiating the second sensor based on information uniquely identifying the first sensor;
• disconnecting the second sensor from the initiation device;
• placing the second sensor in the vicinity of the first sensor so that NFC-communication is enabled;
• with the first sensor being connected to a power source and the second sensor not being connected to an external power source, communicatively connecting the first sensor to the second sensor via NFC and transferring settings from the first sensor to the second sensor;
• replacing the first sensor of the field device system with the second sensor;
• connecting the first sensor to the initiation device;
• and
• transferring a verification from the first sensor to the initiation device confirming that the transfer of settings from the first sensor to the second sensor was completed.