Transducers for automatic testing are applied with water couplings and so-called immersion transducers. Generally, other transducer types are applied in ultrasonics, but not in the field of plastic pipe extrusions. The transducer is available in a cylindrical housing and can therefore be easily assembled into the holding devices.
Diameters are approx.
10 - 25 mm with a transducer length of approx. Mostly they are equipped with a mould-in coaxial cable and a high frequency plug connection at the other end. The transducer itself is waterproof, the plug connection is protected against splash water only and should therefore be placed in a dry space and connected with the equipment via an extension. Some manufacturers supply transducers with plug connections on the housing, however, they cannot guarantee reliable operation over a long period. The piezo element is loaded with a damping body at the rear, this generates a short pulse.