Abstract: The invention provides a method of installing a sensor system in insulating material surrounding plant equipment and/or pipe work in a facility. The method comprises selecting a section of insulated plant equipment and/or pipework of the facility and installing a plurality of sensors in insulating material surrounding the plant equipment and/or pipe work in the section according to an installation plan. The plurality of sensors is installed by transmitting and/or receiving at least one unique identifier to and/or from each sensor of the plurality of sensors using an electronic apparatus and recording at least one installation property of each of the plurality of sensors using the unique identifiers. The method also comprises defining a group of installed sensors using the transmitted and/or received unique identifiers and associating the group of installed sensors with the section of insulated plant equipment and/or pipework.