Some drivers of vintage cars like to know the temperature of the water in their water coolers a little more precise while others like to add an additional electric fan. In any case, adding an electronic temperature sensor helps. That's when you are agoing to drill a hole an add a threaded socket.
The challenge: The entire water cooler is soldered. Applying too much heat other johints might melt and damage the radiator. Inductive heating guarantees a very precise temperature througout the whole soldering process. Very little heat is applied around the joint so the other joints stay cool.