Non-contact level detection of liquids and solids can present a challenge for some technologies. Laser distance measurement systems cannot accurately detect the level of clear liquids. With pinpoint light spots, these systems cannot account for uneven surfaces of solids such as mounding in receiving bins.
Ultrasonic sensors detect liquid and solid level without direct contact reliably.
Challenging objects such as transparent bottles, glass, and grid-sructured targets are always difficult to detect using optical systems and high-precision cameras are simply too expensive.
Ultrasonic sensors can solve these applications, regardless of color, structure, sound absorption properties, and transparency. It offers unsurpassed cost-performance ratio compared to other systems.
Films, papers and other web materials often have reflective coatings and colors that present a challenge when developing a single solution to measure roll diameter of varied materials. False switching and measuring inaccuracy can result in failure to correctly detect the end of the roll.
Ultrasonic sensors solve this application reliably.
When measuring irregular or sound-absorbing objects, standard diffuse ultrasonic sensors might not receive a return echo. For such applications, retro-reflective sensors can be used. The emitted sound is returned from a defined reflector and received by the sensor. An object is detected when it interrupts the reflected signal regardless of object orientation or surface material.
Ultrasonic sensors are characterized by a wide beam. This is an advantage where irregular targets such as mesh boxes need to be detected. But what if the level of small inside the mesh box must be detected or high-precision detection is required? The sound tube (E23000) has been developed precisely for such applications. It focuses the sound and narrows the beam, enabling detection through small openings.