Ultrasonic piezoelectric transducer S3740 0.25A0D30CL DATA SHEET Main technical specifications Transducer type Nominal frequency Piezoelement diameter Time of double passage Max transmitter pulse voltage Nominal piezoelement capacity Connector type Operation temperature range Dimensions Weight contact straight combined 0,25 MHz 30 mm 0,15 µs 400 Vpp 12600  2500 pF LEMO 00.250 о from minus 20 to plus 50 С 36,5  40 mm 220 g Measurement conditions and used equipment Excitation Rectangular pulse with amplitude 20 V and duration, equal to half-period of nominal frequency oscillations. Amplifier with 0,01 - 15,00 MHz bandwidth and 3,6 kΩ input impedance. Effective noise level, normalized to the amplifier input level, is less than 20 µV. Damping resistor 200 Ω (connected in parallel to the transducer). Single LEMO-LEMO with wave resistance 50 Ω and 1 m length. Calibration blocks Set of ultrasonic samples of thickness and speed of propagation of ultrasonic waves UCB016 Measurement results Backwall echo pulse and its spectrum i

Reverberation noise characteristics (RNC) for the transducer without acoustic load and the curve of backwall echo signal level for steel samples of different The level of 0 dB corresponds to the excitation pulse amplitude. The time and thickness axes are marked minus the ultrasound delay time in the prisms. The level of the bottom echo signal in UCB016 from a depth of 50 mm is marked on the RNC graf by a dot. A calculated curve of the dependence of the bottom signal level in steel 20 on depth is drawn through it. To the right of the ARD curves is the area of the corresponding disk reflector in...