Braun disposable lens protectors allow for accurate and hygienic temperature measurements. For more hygienic and accurate temperature monitoring, Braun disposable lens protectors allow for accurate and hygienic temperature measurements. It is important to change the lens protector of your Braun ThermoScan® after each reading. Disposable protectors ensure hygienic use without the need to clean or disinfect the sensor and virtually eliminate the transmission of infections. Furthermore, by using a new lens protector after each use, you prevent wax build-up that could block the sensor window, which could lead to inaccurate temperature readings.