A.SCOPE Thisspecificationcoverstheopenstructuretypeultrasonicceramicmicrophoneswhichareusedforreceiverandtransmitterofultrasonicwaves. B.SPECIFICATIONNo.ItemUnitSpecificationCondition1NominalFrequencyKHz40.0 2TransmittingSoundPressureLeveldBMin.115at40KHz(0dB=0.02mPa)SeeFig.13ReceiveSensitivitydBMin. 67at40KHz(0dB=V/Pa)SeeFig.24CapacitancepF2000 30%at1kHz5Directionalangle-6dB 60 6DetectableRangem0.5~16 7Operatingtemp.℃-40~+80 8Material Aluminium 9Terminal pintypeSeeappearancedrawing10EnvironmentalProtectionRegulation RoHS