Ultrasonic piezoelectric transducer S5182 2.5A45D12CS DATA SHEET Main technical specifications Transducer type: Nominal frequency: Nominal beam angle: Nominal echo pulse duration: Nominal relative band width: Nominal sensitivity: Piezoelement diameter: Nominal piezoelement capacity: Connector type: Operation temperature range: Dimensions: Weight: Contact angle beam single 2.5 MHz 45 ◦ 2 µs 65 % -60 dB 12 mm 1300 ± 100 pF LEMO 00.250 from -20 to +50 ◦ C 24×19×16 mm 26 g Measurement conditions and used equipment Excitation: Rectangular pulse with amplitude 20 V and duration 200 ns, equal to half-period of nominal frequency oscillations. Amplifier with 0.01-15 MHz bandwidth and 400 Ω input impedance. Effective noise level, normalized to the amplifier input level, is less than 20 µV. Damping resistor: 100 Ω (connected in parallel to the transducer). Single LEMO-LEMO with wave resistance 50 Ω and 1.2 m length. 1. Calibration block СО-3 from the set of ultrasonic calibration blocks 55724, serial number 190212; 2. Calibration block СО-2 from the set of ultrasonic calibration blocks 55724, serial number 190212; 3. Standard sample СО-1M of steel 20, ultrasonic shear wave velocity 3226 m/s. Measurement results Spectral amplitude, rel. units Echo pulse for 50 mm thickness and its spectrum

Reverberation-noise characteristics (RNC) of the tranducer without acoustic load and DGS diagram for flat bottomed reflectors with area 1, 3 and 10 mm2 The level of 0 dB corresponds to the amplitude of the transducer excitation pulse. Calculated parameters and acceptance results Parameter Work frequency (Mean of border spectrum frequencies) , MHz Beam angle in steel , Echo pulse duration (at -20 dB level from maximum) , µs Relative spectrum bandwidth (at -6 dB level) , % Sensitivity (bottom echo pulse and excitation pulse amplitudes’ ratio), dB Sensitivity margin above the RNC in the time interval...