Without knowing it, you encounter the Reed switch almost daily: in the kitchen as an alarm contact when the water tank of the coffee machine has to be refilled, in the car when the display asks to refill the windshield wiper water or in the office, hidden in countless fire alarms. Every year, over one billion reed contacts are installed worldwide. Whenever a fill level or position needs to be monitored, there is a very good chance that this is done with the help of reed technology.