Ultrasonic transducer S0205 DATA SHEET Intended use The ultrasonic transducer S0205 is used to perform the ultrasonic testing of various materials and products to evaluate their physical and mechanical properties using transmitting and receiving of ultrasonic longitudinal waves. The transducer can be used as a part of ultrasonic low frequency flaw detectors in pulse-echo mode or ultrasonic pulse velocity testers in through-transmission mode Main technical specifications Type of transducer: Piezoelectric with liquid contact, low frequency, short pulse, low noise Type of generated wave mode: Longitudinal Nominal frequency: 25 ± 5 kHz Delay time in the transducer protector: 0.2 s Effective transducer aperture diameter: 25 mm Electric capacity of the piezoelectric element: 12500 ± 1000 pF Maximum excitation pulse voltage, V: ± 250 V Connector type: LEMO00 Overall dimensions: 69 х d28 mm (31 mm on connector) Weight: 150 gr Measurement conditions and equipment used Temperature 25ºC, rel. humidity 43% The transducer values are measured at the testing bench consisting of a low-frequency pulser-receiver unit A1560-LF. For evaluating the transducer characteristics, the method of through-transmission of longitudinal ultrasonic waves through a plexiglas sample is used. The thickness of the plexiglass sample is 200 mm. The tested transducer operates in the transmission mode. As an ultrasonic pulse receiver, a broad-band single-crystal piezoelectric transducer with the nominal frequency 1 MHz and effective aperture 20 mm is used. Measured characteristics in the longitudinal wave mode Amplitude frequency response Shape of the measured pulse Signal parameters Maximum half-wave amplitude of the pulse, mV Pulse duration at the -14 dB, msec Lower band frequency at the -3 dB level, kHz Upper band frequency at the -3 dB level, kHz Absolute band width P at the -3 dB level, kHz Relative band width Bw at the -3 dB level, % © Acoustic Control Systems –