Piezo Ring 10x5x2mm 142 KHz SM111

Part Number: SMR1005T20111

Piezoelectric Ceramic Ring with Silver electrodes on both sides.

Piezo Material: SM111
Dimensions: OD 10 x ID 5 x Th 2mm
Resonant frequency fr: 142 KHz±4 KHz
Electromechanical coupling coefficient Keff: ≥35%     
Resonant Mode: Radial mode by impedance analyzer.
Resonant impedance Zm: ≤20 Ω
Static capacitance Cs: 350pF±15%@1kHz
Test Condition: 23±3 °C 40~70% R.H.
fr, Zm, Kp => Radial mode by impedance analyzer.
Cs => LCR meter at 1KHz 1Vrms

Applications: Bolt-clamped ultrasonic transducer, Ultrasonic Sensor, Vibration Sensor, Pressure, sensor, Vibration generation, Biodiesel mixing transducer, Piezo expansion sensor, compression sensor, Piezo Welding, Tonpilz and others.
Notes: Keff = ≥35%. Keff is calculated by the formula, ((fa2-fr2)/fa2), and fa is the anti-resonant frequency of the hoop mode.