... 1 ultrasonic sensor size, characteristics, performance parameters and precautions, before using this product, please read this specification. 40A16TR-1 ... ultrasonic insect killer, ultrasonic range finder, ultrasonic sensor for non-contact detect objects, etc. If ... Proof TypeUsing MethodReceiver and TransmitterNominal Frequency23.0±1.0KHzSound Pressure130dB minSensitivity-67dB min.Capacitance2500Pf±20% ...