The Kirchner MSKW limit switch are used for remote monitoring of measuring limits in variable area flow meters with borosilicate glass tubes. The reed switch is actuated by a magnet installed in the float to switch contacts. 
Variable area flow meters with borosilicate glass cones from Kirchner Germany, are cost-effective and reliable instruments used for water, air or transparent fluids in processing plants in the F&B, Chemical, Petro-Chemical, Furnace, Water/Waste Water and other industries.
The measuring cone is customized with media specific scale and located inside a perspex half shell shatter proof protection tube. They are installed in pipelines by means of pipe unions or mounted between flanges.
The 
limit switch is mounted on a guide groove or rod. It consists of an M8 x 1 threaded sleeve and an angular coupling. The threaded sleeve contains a reed switch and a holding magnet which enables a bistable switching behaviour. The limit switch is actuated by a permanent magnet installed in the float. If it passes the limit switch, the contact switches. VA flow meters can accommodate several limit switches with different measuring points.