Kepo piezo transducers 10 45 05khz range kepo kpt g2328bp 6242 the kepo piezo transducer 28 05khz 30mm is able to generate a continuous tone when energised by a 9vp p square wave rated voltage outputs of up to 92db at 9vp p20khz10cm can be achieved suitable for use in professional commercial and industrial applications kepo kpt g2328bp 6242 piezo transducer 28 05 khz 30mm