A.SCOPE Thisspecificationcoverstheopenstructuretypeultrasonicceramicmicrophoneswhichareusedforreceiverofultrasonicwaves. B.SPECIFICATIONNo.ItemUnitSpecificationCondition1NominalFrequencyKHz40.0 2ReceiveSensitivitydBMin. 65at40KHz(0dB=V/Pa)SeeFig.13CapacitancepF2000 30%at1kHz4Operatingtemp.℃-40~+80 5Material Aluminium 6Terminal pintypeSeeappearancedrawing7EnvironmentalProtectionRegulation RoHS