The NXT+ (photo) is a new alarm module that monitors the gas pressures at the inlets of the gas mixer and in the mixing gas vessel to ensure a constant process quality. These mixers work with a high pressure-fluctuation tolerance and provide precise gas mixtures even at different input pressures. In the event of an irregularity, the alarm module protects against unwanted gas mixtures to avoid expensive production failures. By monitoring both the input pressure and that inside the vessel, the entire mixing process remains under control, says the company. — Witt-Gasetechnik GmbH & Co. KG, Witten, Germany