In many parts of our world, water is a very limited resource. In these areas, the treatment of seawater or foul water is becoming ever more important. Manufacturers of water-treatment systems have been relying on products from STS Sensor Technik Sirnach AG for years. Users depend on high-precision, high-quality and long-lasting products. Thousands and thousands of level sensors used in these applications have performed their duty in water-treatment systems for years.