Zöllner Makrofon M75F/370ZVE

SHIP CLASS III - SHIP LENGTH 20 BUT LESS THAN 75 METRES
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

SHIP CLASS IV - SHIP LENGTH 12 BUT LESS THAN 20 METRES
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: 120 dB
Specification: BSH type approval DHI 49/04 P/78 for compressed air 4 to 10 bar, operating on AC 1phase and/or 24 V DC intensity: 132 dB fundamental frequency: 370 Hz