History

Purivox_Duplex

In 1950 the first carbide and water devices were introduced. The ignition was by flint, instrument control was mechanical and the shot interval was regulated by water volume, i.e  controlled through the resulting produced gas volume. Later  acetylene and propane gas was used, while the flint was, in course of time, replaced by a more reliable high-voltage `piezo´ ignition.

Purivox_Doppelschuss

 

 

It was noted that the regular single-shot did not allow for reliable protection of crops over a  sustained period. A mechanical control system  was developed in which two shots in quick succession was given. This development improved the effectiveness of the equipment but was expensive and prone to malfunction.

Purivox_Triplex_V

 

 

1988 saw the introduction of electronically controlled sonic blast shock devices.  This was a giant leap towards the effective long-term defense of crops, bringing reliability and greater application.