Description
AUTRONICA
TYPE: BHH-31A/EX
OPTICAL SMOKE DETECTOR
WITH BASE
ID-NO.: B982421 84
INSP.IST.: AU-0842
EN-54-7
BWA-40A/1
The Autronica BHH-31A/EX is an optical smoke detector supplied complete with its mounting base, designed for use within marine fire alarm systems. Employing light-scattering optical detection technology, it identifies the presence of smoke particles in the monitored environment and triggers the connected fire alarm panel at the earliest stage of a developing fire. As a core component of a shipboard fire detection network, reliable performance from this type of detector is essential to crew safety, vessel compliance, and the protection of cargo and machinery spaces.
Key Features
✓ Optical smoke detection technology using light-scattering principles for early-stage smoke identification, supplied complete with dedicated mounting base for straightforward installation.
✓ Certified to EN 54-7, the recognised standard for point-type smoke detectors using scattered light, transmitted light, or ionisation — confirming performance to an established benchmark.
✓ Compatible with Autronica fire detection systems; exact panel and loop compatibility should be confirmed against the vessel’s installed system configuration and documentation.
✓ Suitable for installation in accommodation spaces, control rooms, and other monitored areas onboard where optical detection is specified; mounting and environmental ratings subject to confirmation per installation requirements.
✓ Direct replacement component for Autronica BHH-31A/EX installations, supporting scheduled maintenance, detector head replacement programmes, and fire system servicing routines onboard.
Marine Applications
✓ Accommodation blocks, cabins, and corridors aboard merchant vessels where early smoke detection is required as part of SOLAS-compliant fire alarm arrangements.
✓ Control rooms, wheelhouses, and ECR spaces on offshore vessels, tankers, and bulk carriers where protection of critical operational areas is a priority.
✓ Passenger ferries and cruise vessels requiring high-density detector coverage across multiple monitored zones connected to a central fire alarm panel.
✓ Offshore platforms and support vessels operating Autronica fire detection systems as part of their integrated safety and alarm infrastructure.
✓ Newbuild and retrofit fire alarm projects where EN 54-7 certified optical detectors are specified by class surveyors or fire system designers.
Why Marine Engineers Choose
The Autronica BHH-31A/EX is a well-established detector within Autronica fire alarm installations, valued for its optical detection reliability, EN 54-7 certification, and straightforward base-mounted installation that simplifies both initial fitment and routine replacement during scheduled maintenance periods.
Ideal For
Merchant vessels, tankers, bulk carriers, passenger ferries, offshore support vessels, cruise ships, and any vessel operating an Autronica fire detection system requiring certified optical smoke detector replacement or expansion components.
Technical Support
Technical support is available for the Autronica BHH-31A/EX optical smoke detector and associated fire alarm system components. Assistance covers onboard installation guidance, detector replacement procedures, and remote troubleshooting for Autronica fire detection systems.




