A.SCOPE Thisspecificationcoverstheopenstructuretypeultrasonicceramicmicrophoneswhichareusedfortransmitterofultrasonicwaves. B.SPECIFICATIONNo.ItemUnitSpecificationCondition1NominalFrequencyKHz40.0 2TransmittingSoundPressureLeveldBMin.110at40KHz(0dB=0.02mPa)SeeFig.13CapacitancepF2000 30%at1kHz4Operatingtemp.℃-40~+80 5Material Aluminium 6Terminal pintypeSeeappearancedrawing7EnvironmentalProtectionRegulation RoHS