China (Mainland) Ultrasonic Fish Finder, Underwater Piezoelectric Transducer

Specifications: Piezoelectric ceramic transducer is absolutely necessary component of underwater and sonar communication equipment, such as ultrasonic fish detector, seabed acoustics engineering instrument, etc. The piezoelectric transducer for ultrasonic fish finder: Diameter:27.5mm,43.5mm,60mm Frequency:200KHz,50KHz,37.4KHz 1. Top and bottom electrodes to be silver fired (Dupont 7095 or equivalent) 2. Minimum silver oxide thickness 3um using fisher X-ray method. 3. Electrode surface flatness not to exceed 20 micrometers. 4. Electrode parallelism not to exceed 14 micrometers.