Description
AUTRONICA
TYPE: BJH-33/EX
SMOKE DETECTOR HEAD
ID-NO.: A090411 64
AM-241: 0.5 UCI
PI= 0.65W UI=17.5V CI=0.15UF LI=0
The Autronica BJH-33/EX is an ionisation-type smoke detector head designed for use within marine fire alarm and detection systems. Utilising a small Americium-241 ionisation source (0.5 µCi), the unit detects the presence of combustion particles in the surrounding air, triggering an early alarm signal before a fire develops into a critical hazard. With rated input parameters of UI=17.5V and PI=0.65W, the detector is engineered to operate within intrinsically safe loop circuits, making it suitable for installation in defined hazardous or controlled environments onboard. As a core component of the fire alarm system category, the BJH-33/EX plays a vital role in meeting onboard fire safety obligations and supporting crew response readiness.
Key Features
✓ Ionisation smoke detection using AM-241 (0.5 µCi) source for reliable early-stage combustion particle sensing.
✓ Defined intrinsic safety parameters: UI=17.5V, PI=0.65W, CI=0.15µF, LI=0 — suitable for loop integration in controlled electrical environments.
✓ Compatible with Autronica fire detection systems; panel and loop controller compatibility subject to confirmation against vessel-specific configuration.
✓ Intended for installation in areas where early smoke detection is operationally critical; mounting location and environmental suitability should be verified against the vessel’s fire detection layout.
✓ Replacement of detector heads such as the BJH-33/EX is a routine service activity supporting continuity of the fire alarm system and compliance with periodic survey requirements.
Marine Applications
✓ Accommodation and cabin spaces aboard commercial cargo vessels and passenger ships where smoke detection is mandatory.
✓ Engine room boundaries, control rooms, and switchboard spaces requiring continuous fire monitoring.
✓ Machinery spaces and auxiliary equipment rooms on offshore support vessels and platform supply vessels.
✓ Fire alarm loop systems on tankers and bulk carriers where intrinsically safe detector circuits are specified.
✓ Naval and coast guard auxiliaries requiring certified fire detection components across multiple detection zones.
Why Marine Engineers Choose
The Autronica BJH-33/EX is a well-established detector head trusted in marine fire alarm installations for its defined safety parameters, straightforward loop integration, and suitability as a direct replacement within existing Autronica detection systems.
Ideal For
Commercial cargo ships, bulk carriers, tankers, passenger ferries, offshore support vessels, platform supply vessels, and any vessel operating a fixed Autronica fire alarm detection system.
Technical Support
Technical support is available for the Autronica BJH-33/EX and associated fire alarm system components. Assistance covers onboard installation guidance, detector head replacement procedures, and remote troubleshooting for loop faults or system integration queries.
