Level sensors are not a specific brand but a category of industrial devices used to measure and monitor the level of liquids or solids in containers. Various companies worldwide produce level sensors, including prominent brands like Siemens (Germany), Emerson (USA), and Endress+Hauser (Switzerland). These sensors serve industries such as oil & gas, water treatment, food & beverage, and pharmaceuticals. Common types include ultrasonic, radar, capacitive, and float sensors. For specific brand information, you may refer to industrial suppliers like Radwell (https://www.radwell.com) or Grainger (https://www.grainger.com).