Avertisseur sonore électrique à pistons (pour navires > 20 m et < 75 m)
ZETFON 300/310
ZÖLLNER
class requirements:
limits of fundamental frequencies: 250 - 700 Hz
intensity in 1/3rd-octave band level at 1 m distance
referred to 2x10-5 N/m²: 130 dB
ZETFON 300/310
specification:
Type approval BSH/4615/6021225/09
operating on 24 V DC
intensity >130 dB (t)
fundamental frequency: 310 Hz
optional command device
extremely compact design
