Each standard group is continuously monitored over the entire measuring range with an ultrasonic gas meter.
The standard group DN250 uses a USM with a nominal diameter of DN500 with a measuring range of 130m³/h to 16.000m³/h.
The standard group DN100 uses a USM with a nominal diameter of DN250 with a measuring range of 25m³/h to 2.500m³/h.