The device warns against dangerous concentrations of the carbon monoxide, hydrogen sulphide, oxygen, carbon dioxide, sulphur dioxide, chlorine, hydrogen cyanide, ammonia, nitrogen dioxide, nitrogen monoxide, phosphine and organic vapors. New extra small Drager XSS sensor reacts so fast and shows the dangers about gas at the beginning. Sensor is on the best place to measure in any condition. Rubber case preserves the Pac 7000 against all the external effects. Pac 7000 meets the strict dust and water protection requirements specified in IP68. Dräger designed the Pac 7000 for unlimited lifetime usage. Pac 7000 has visual, audible and vibratory alarms. In addition the user is warned when the battery is low or a functional error has occurred. Calibration of the devise is so easy.