Ultrasonic transducer S1902 DATA SHEET Intended use Main technical specifications Type of generated wave mode: Nominal frequency: Operating frequency: Double conversion ratio: Relative frequency bandwidth: Electric capacity of the piezoelectric element: Maximum excitation pulse voltage: Connector type: Overall dimensions: Weight: Operating temperature range: Shear horizontal 25 kHz (25 ± 10) kHz 70 dB or better > 90 % (1500 ± 800) pF < 200 V Lemo 00.250 < 49×Ø17 mm < 66 g -30 °C to +60 °C Measurement conditions and equipment used The measurement of the tested DPC transducer characteristics occurs in combination with the reference DPC transducer, whereby both transducers are connected by their tips with the nip force of 4 N. The tested transducer operates as a trans- mitter and the reference transducer operates as a receiver of ultrasonic waves. The double conversion ratio Srel is determined as a ratio value between the received signal amplitude on the reference transducer and excitation pulse amplitude on the tested transducer. Excitation signal: square pulse with the amplitude 200 V, duration 10 μs, equal to half period of the nominal. Receiver parameters: integrating amplifier with the bandwidth 0.01 Hz – 400 kHz, input resistance 4 kΩ, equivalent input noise voltage 10 μV. Environmental temperature 24 °C, rel. 36 %. conditions: Amplitude-frequency response Level, rel.un. Measured characteristics Shape of the measured pulse Time, μs Echo pulse duration τ: AFC frequency maximum ƒp: Lower AFC frequency ƒl: Upper AFC frequency ƒu: ©Acoustic Control Systems - ACS Group Frequency, kHz Operating frequency ƒc: Double conversion ratio AFCmaximum Srel: Transducer delay td: Relative frequency bandwidth (at -6 dB) Bw: