Ultrasonic transducer S1823 DATASHEET Intended use Dry point contact ultrasonic transducers S1823 with wave type switching and a are used to perform ultrasonic inspections of various non-metallic materials and products to determine their physical and mechanical properties. The transducers are regularly used as a transmitter-receiver couple. Main technical specifications Type of transducer: Type of generated wave mode: Dry-point-contact Longitudinal or shear-horizontal Special properties: Couplant-free operation Nominal frequency: 120 kHz Electric capacity of the piezoelectric element: 1.400 ± 200 pF Maximum excitation pulse voltage, V: 400 V Connector type: OSMT or LEMO00 Overall dimensions: 11x22.6 mm Weight: 14 gr Measurement conditions and equipment used Temperature 25ºC, rel. humidity 43% The method of passing of the ultrasonic waves through a tapered sample from fluoroplastic is used. The tested transducer operates in the transmission mode. As an ultrasonic pulse receiver, a broad-band single-crystal piezoelectric transducer with the operating frequency 5 MHz and effective aperture 10 mm is used. Generator transmitting signal: half-sine video pulse with 200 V amplitude and 2.0 mcs duration time at the -20 dB level from the maximum. Receiving path parameters: the integrating amplifier AKS310 is used. The amplification is 400 at 100 kHz frequency, the band 2 is 250 kHz and the input impedance is 40 kOhm. In the longitudinal wave generation and receiving mode, the piezoelectric elements of the tested transducer are connected in parallel and co-phasal. In the shear wave mode, they are connected antiphasal via the transformer with the interrupted ferrite core, the transformation ratio is 1:1 and the inductivity of each coil is 20 mH. Excitation scheme for longitudinal and shear wave generation © Acoustic Control Systems – ACS Gro

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 Maximum spectrum frequency, kHz Relative frequency band at the -3 dB level, % Lower band frequency at the 3 dB level, kHz Upper band frequency at the 3 dB level, kHz Average band frequency at the -3 dB level, kHz Average compound band frequency at the -3 dB level, kHz Measured characteristics in the shear wave mode Amplitude frequency response Shape of the measured pulse Signal parameters...