There are two different types of transducers, immersion transducers and contact transducers. These transducers are categorized based on their application.
Contact transducers can be further divided into different kinds based on their specific configuration or purpose. Some of these types are dual element, delay line and angle beam. The dual element type has two independently functioning elements in a sole housing. It is beneficial for checking near surface defects and measuring thickness of thin materials. The delay line type is beneficial for delamination inspection in composite materials and high precision measurement of thin material thickness. For generating surface waves that can detect a component's surface defects, the angle beam type can be used.