The ST350EX-NDIR is an all-round gas detector which is suitable for a large number of applications where Carbon Dioxide forms a risk. The heart of the detector is a replaceable gas sensor. The measuring principle consists of an Infrared sensor (NDIR) with a high durability. The sensor offers a long term stability and has a long life-span, which achieves an optimal cost of ownership. The ST350EX-NDIR is available with or without a graphic display. The version with a graphic display, shows the measured value and various status notifications locally. The capacitive key control gives you an experience similar to a touchscreen and enables easy navigation through the user/calibration menu. The user menu is secured with a password; unauthorized users cannot access the gas detector.