MAKROFON M125/130b-160b ZVE(E)(H) The ZÖLLNER MAKROFON M125 is a diaphragm sound transmitter operating on compressed air. The signal is released by an electromagnet or manually using a hand pull-rope. To avoid the costly laying of a pull-rope, a second electromagnet for emergency voltage can be provided. A thermostat controlled anti-condensation heating keeps the sound horn and the operating valve free from condensed water and thus from ice. Typically the MAKROFON M125 will operate on air pressures between 7 and 40 bar. For electric release and operation of the heating a connection to 230 or 115 V AC 1phase or 24 V DC power supply is required. » broad frequency spectrum with many higher harmonics » signals with strong over tones for best penetration of background noise level. Even when a background noise covers the actual basic frequency the residual tone forms a parent frequency in the human hearing. Two or three harmonics are sufficient for the hearing to perceive the basic frequency. » sound frequency of 130/160 Hz very advantageously ranks in the lower admissable range (130-350 Hz) » sound pressure level 138 dB in 1/3rd-octave band level at 1 m distance » full compliance with the COLREG 1972 Annex III » type approved by all wellknown international authorities and classification societies Application: » vessels of class II (75 m but less than 200 m in length) » land alarm, i.e. bunker stations, oil refineries, airports, power plants, factories » decades of experience » best material and workmanship - made in Germany » entirely made of best non-corrosion, seawater resistant materials » sound horn made of sheet-aluminium (not plastic!) » simple but matured design, almost maintenance-free » easy exchange of all parts with onboard tools » easy installation - relatively low weight

Technical information Positioning and installation Positioning as high as practicable on the vessel to reduce interception of the emitted sound by obstructions and to avoid hearing damage risk to the personnel. The sound pressure level of a vessel’s own signal at listening posts must not exceed 110 dB (A). Installation - compressed air supply pipe preferably of copper with a filter (type F3.1) preceding the Makrofon operating valve. Supply pipe must be free from any dirt particles and moisture. 1 valve 1 heating thermostat valve 2 emergency current heating tension SHIP LENGTH AIR CONSOUND INTENSITY...