Zöllner Makrofon M75F/260ZVE

SHIP CLASS II - SHIP LENGTH 75 BUT LESS THAN 200 METRES
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

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
Specification: BSH type approval DHI 49/04 P/03/82 for compressed air 6 to 40 bar, operating on AC 1phase and/or 24 V DC intensity: 138 dB fundamental frequency 260 Hz