Avertisseur sonore électrique à pistons (pour navires >75 m et < 200m m)
141 AC
ZÖLLNER
class requirements:
limits of fundamental frequencies: 130 - 350 Hz
intensity in 1/3rd-octave band level at 1 m distance
referred to 2x10-5 N/m²: 138 dB
Zet-Horn 131 AC
specification:
Type approval BSH/4615/6021096/09
operating on AC 3phase(230V/380V/440V/690V)
intensity: 138 dB (t)
fundamental frequency: 130 Hz
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