Crocon d.o.o.

signal system technologies


Whistles are like our ears…they receive sounds, direct us, warn us about possible dangers or simply greet us, talk to us…in their own language…the language of signals and intensive sounds. Over half a century, in the hands of the family of its founder, with their age-long experience and constant development, Zöllner continues to strengthen its position of leading manufacturer of sound signal equipment for vessels, railways and the industry, and remains a competent and reliable partner for ship’s electric whistles, compressed air whistles, gongs and bells as well as innovative custom-made sound solutions.


Sound signal. Whistle. Zet-horn. Zetfon. Makrofon. Elephant ears. SRD. Gong. Bell. Signal automaton. Uni-alarm. Morse key…and more.