Without vacuum monitoring, no vacuum system is safe enough for operators and transported goods. Vacuum gauges are mainly used for vacuum lifting devices and semi-manual systems. With clear displays, these operators provide a quick overview of the vacuum level status and allow an assessment of the safe and reliable operation of the vacuum system. Suppression switches and warning devices implement DIN EN 13155 and protect users and the vacuum system in accordance with standards. The components register the vacuum drop and stop the system or warn by optical-acoustic signals.