About Kahlenberg UK

Kahlenberg UK Ltd is the European distributor for Kahlenberg Industries, Inc. providing full European support and local stock for Kahlenberg marine and industrial air horns, sound signals, controllers, air compressors and the company's other products.

Please contact us for further assistance at or on +44 (0)1635 35353

Sound signal legal requirements

IMO COLREGs bookWhile countries across Europe will have local laws that apply to ship and boat navigation, there is a common requirement worldwide for all leisure, commercial and military vessels to conform to the IMO International Regulations for Preventing Collisions at Sea. As Steve Austin, Senior Policy Lead at the UK Maritime & Coastguard Agency (MCA) explains: "The COLREGs apply to all vessels, there is no differentiation between coded and non-coded vessels. Should the whistles prove not to conform then they will need to be modified or changed."

"Whistles should conform to the performance in COLREGs, Appendix III and the appropriate parts of IEC 60945 to EN60945 which deal with the marine operating environment."

All Kahlenberg products meet or exceed these requirements. Many other new and currently installed sound signals are non-compliant and might be breaching maritime law and invalidating insurance cover.

CA industrial air horns

Kahlenberg CA industrial air hornThe Kahlenberg CA marine and industrial air horn is perfect for use in many situations including fire alarm, engine room and general industrial sound signal and mass notification situations. It can be supplied as a single horn, a duo or a quadruple omni-directional array.

The CA marine and industrial air horn is solidly built from solid bronze and stainless steel and rated to IP54. This makes it perfect for reliable service in hazardous and corrosive environments in operating temperatures from -20°C to 80°C (-4°F to 175°F).

The CA marine and industrial air horn can operate on air, nitrogen or CO2 and it has fine tuning capability with an adjustable ring. Its fundamental frequency is 745Hz, sound pressure level (SPL) is 132dBA at 1m and it will produce an SPL of 70dB at 1000m (0.6 statute mile) in calm, cool conditions given no topographical interference.

Air consumption is 7l/s (14scfm) on 7bar (100psi). Dimensions are a compact 120mm x 102mm X 114mm (4.7in x 4in x 4.5in) and weight is 3.2kg (7lb).

Kahlenberg CA marine and industrial air horn downloads

Kahlenberg CA marine and industrial air horn technical information

Further information

Call Kahlenberg UK now on +44 (0)1635 35353 or email