The VKG by Kobold is a stream meters and switches model which have a spring-stacked float that slides inside a cylindrical measuring tube. It has an integral orifice which is accepted to be different. The float of this licensed gadget holds changeless magnets which impel a potential free bistable reed contact mounted outside the flow. This and other design function implies that for the first time, it made a flow meter and switch completely adjust for vast degree for thickness even with low flows. The contact is inserted inside a height flexible plastic casing to avoid harm to the contacts by mechanical activity or forceful climates.