An especially economic, reliable, easily applied and dependable method is presented by the new, large faced, remote viewable Jumbo-CelsiDot® temperature recording labels. For example the CelsiDot® 93°C applied on the electric motor on the left side of the image has permanently turned from white to black, a sure sign that this location had exceeded in the past the label’s 93°C temperature trigger level. An identical Celsi®label applied to the gear case to the right is still white, an undisputed sign that there the temperature history never has reached or even passed the 93°C level.