Differential pressure switch for liquid, gas (DDCM)
For flow monitoring and differential pressure control of steam, gas, hot/cold water and 
automatic checking of filter plant.
Vacuum switch for liquid, gas (VCM)
For monitoring vacuum of non-aggressive liquids and gaseous media.
Vacuum switch for aggressive liquid, gas (VNS)
For monitoring and controlling pressures in devices of the chemical industry and   
in the process engineering as well as wherever the pressure of aggressive liquids and 
gases has to be monitored.