"The focused basic transducer" Features: focused ultrasonic transducer operating range from 0.06 m to 0.3 m well focused sound lobe narrow bandwith in frequency different housings available standard transducer in stable housing Data sheet SC040...
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Multi-use transducer SC049
"Our smallest" Features: Multi-use ultrasonic transducer operating range from 0.02 m to 0.3 m smallest design with 6 mm diameter and mm height, perfect for small assemblies minimal blind zone Data sheet SC049 (PDF)
Pulsed transducer SC135
"The Impuls-Basic in a stable housing" Features: pulsed ultrasonic transducer SC135 non-resonant transducer operating range 0.03 m to 0.3 m wide bandwith in frequency short echo pulse fast ringout Data sheet SC135 (PDF)