Review on Weller WPS10 Conical 0 03125 Wps18 by Andrew Young

Exactly what was described. Some of these require a slight "opening" of the outer shield, which is usually very snug against the soldering iron. Tapered tips seem to have the sensor in a different position than wedge tips. Response time of conical tips is much better, much faster for small changes in thermal load of a tip touching a smaller pad.