S1: What is the difference between 5.5" Special Edition and Universal Version?

The S1 5.5" Special Edition features a longer probe (5.5 inches / 140mm) compared to the Universal Version, while maintaining the same base stem diameter of 7.8 mm (0.3 inches). This extended length is ideal for grills or smokers with deeper internal spaces—such as the Old Country Gravity Fed smoker—where the thermometer needs to reach closer to the food for more accurate readings.