DHR H400 Series
The H400 Maritone is the first air horn developed by DHR which has been approved according the international rules of Colreg ‘72. An excellent whistle for seagoing vessels with a maximum length of 75 meters. It has an audible range of more than 1 nautical mile. The combination of high quality materials and precision manufacturing, provides superior durability for a lifetime operation. With the introduction of the attractive H400 Maritone, DHR positions itself as a pioneer in advanced maritime signalling solutions.
 | Robust design |  | Maintenance friendly |
 | Easy installation |  | High quality materials |
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Application
Sea-going vessels up to 75m in length
Inland navigation vessels on German inland waterways (Seeschifffahrtsstraßen)Materials
316L stainless steel membrane housing
Brass horn with powder coated finishingWeight
Air horn 2.6 Kg
Mounting bracket 0.1 KgApproval
COLREG'72Air consumption
8 - 12 l/s at 7 Bar
Note that a powerfull onboard compressor with air storage tank is needed to provide enough airpressure and airflow.
HornLengthDiameterFundamental frequencySound pressure levelArticle codeH400342 mm180 mm440 Hz130 dB at 1/3 octave or 142 dB(A)40001