Which component of the pitot static system is protected from icing by electrical heating elements?

The pitot probes are equipped with electrical heating elements specifically designed to prevent icing. In aviation, icing can significantly affect the accuracy of airspeed measurements, as ice can obstruct the flow of air into the pitot tube, leading to erroneous readings. By using electrical heating elements, the system ensures that the probe remains clear of ice, maintaining the functionality and reliability of airspeed indications.

In contrast, while static ports and other components like the altimeter and the airspeed indicator might face issues related to atmospheric conditions, they do not have built-in heating elements to protect against icing. The static ports rely on the ambient air pressure for accurate readings and are not heated, while the altimeter and airspeed indicator function based on readings that derive from either static pressure or pitot pressure but are not directly heated themselves. Thus, the best option concerning the question is the pitot probes, as they are specifically designed with heating elements for this protective purpose.