This object reports the lowest temperature this specific sensor has recorded since the module was last rebooted, mirroring the high-temperature record but for the cold end of the range. It's useful for equipment installed in environments with wide temperature swings, such as an outdoor cabinet, where a low-temperature excursion below the card's rated operating range could have caused a transient fault that wouldn't show up in the current reading alone. For example, a recorded low of 2 degrees C would flag a cold-weather event worth correlating against any logged faults from that same period.