20mm transducer film atomization ultrasonic nebulizer chip oscillator piezoelectric ceramic humidifier with (I6B2
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<br />Specification: 20x1.2mm
<br />Resonant frequency: 1.70MHz
<br />Resonant impedance: < 2 ohm 
<br />Coupling factor: > 52% 
<br />Static capacitance: 1800pF
<br />Atomization quantity: < 380ml/h