Dräger Pac 5500 is suitable for fast and accurate personal monitoring and detection of carbon monoxide, hydrogen sulphide or oxygen. Shock-proof rubber casing offers reliable protection against external influences and corrosive chemicals. Device provides requirements of IP68. Dräger XXS Sensor has 10 seconds reaction time and this provides big safe. Also sensor’s 5-8 years lifetime does not increase the cost. Sensor is placed suitable for measurement in any condition. The Dräger XXS sensors are so stable that they only need to be adjusted every two years. Device can store 60 measurements with dates and times. Large and lighted-up display is a big advantage for user, shows measurement unit and gas concentration. The recommended function tests are necessary for device to work properly. These tests are quick and cheap.