Ultrasonic sensors are not a specific brand but a category of devices used across various industries for distance measurement, object detection, and fluid level monitoring. These sensors are produced by multiple companies worldwide, including leading manufacturers like Pepperl+Fuchs (Germany), Sick AG (Germany), Omron (Japan), and Banner Engineering (USA). They serve industries such as automation, automotive, healthcare, and manufacturing. Key products include proximity sensors, flow meters, and level sensors, which utilize high-frequency sound waves to perform non-contact detection and measurement tasks efficiently.