Braun Thermoscan® Pro Thermometer Delivers Results in One Second. Position the probe tip in the ear canal and push a button for a virtually instantaneous and accurate reading. The Braun Thermoscan Pro 4000 Thermometer allows for a wide range of patient temperatures in a variety of ambient temperatures. The ergonomic design is comfortable and durable. Three-year limited warranty. Wall-mount base and probe covers are also available. PRO 4000.