Abstract: The present invention relates to a method and apparatus intended for the detection of low frequency electric waves that can be extracted from water, organic liquids and biological matter. This field phenomenon, that we here refer to here as a “bioharmonic”, is an active frequency, or harmonically related series of frequencies, that are a result of a dynamic interplay of natural processes including physical, chemical and electromagnetic interactions. We have discovered that these interactions influence the organization of signal waveform characteristics at very low frequencies. The apparatus produces a low frequency electrical wave that is coupled to a liquid or solid sample by way of a coupling electrode having a very high impedance. As the detected signal also displays field properties, the electrode does not need to be in contact with the sample in order to extract a unique signal.