A.SCOPE Thisspecificationcoverstheopenstructuretypeultrasonicceramicmicrophoneswhichareusedforreceiverandtransmitterofultrasonicwaves. B.SPECIFICATION No.ItemUnitSpecificationCondition1NominalFrequencyKHz40.0 2TransmittingSoundPressureLeveldBMin.117at40KHz(0dB=0.02mPa)SeeFig.13ReceiveSensitivitydBMin. 65at40KHz(0dB=V/Pa)SeeFig.24CapacitancepF2500 30%at1kHz5DetectableRangem0.5~16 6Operatingtemp.℃-40~+80 7Material PPO 8Terminal pintypeSeeappearancedrawing9EnvironmentalProtectionRegulation RoHS