Disclosed are a position sensor unit and a valve arrangement comprising such a position sensor unit, wherein a sensor housing of the position sensor unit is fixed in position with respect to a housing of an actuating magnet or a valve by an adjusting nut and a counter nut. The ground isolating coating is typically alumina and extends from an active end of the electrolyte body toward an opposing end of the electrolyte body. Thus, the traffic regulation technique regulates the traffic by adjusting the percentage of reserve capacity.