1/4 2/4 3/4 4/4 Control Units Sigma NX Control H Sigma NX Control H is a modular control unit dedicated to complex Gas Detection Systems. It is responsible for controlling all connected devices and integrating them into a single Sigma Gas system. See full description Functionalities: Certificates: Product description Related products Control UnitsSigma Control LGas DetectorsSmArtGas 4Gas DetectorsReAct 4Gas DetectorsProGas 4 Gas Detectors Configurator In order to make your work easier while choosing the right Gas Detectors for the designed Gas Detection and Safety System, we have created a unique electronic configurator. Go to configurator Reliable and Innovative Gas Safety Systems