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. Thermoscan Pro Disposable Probe Covers Help With Protection Designed for patient comfort, disposable covers help protect the unit, user and patient from potential cross-contamination. Probe Covers.