Autronica BHH-31A Optical Smoke Detector
A high-performance addressable optical smoke detector for commercial, industrial, and marine fire alarm systems. EN54-7 certified, marine approved.
Engineered for early detection
The BHH-31A uses light-scattering technology to detect visible smoke from slow-burning, smoldering fires — earlier than heat-only detectors can respond. It is addressable, low-power, and built to meet EN54-7 and marine type-approval requirements.
- Addressable optical smoke detector using light-scattering technology
- EN54-7 certified and approved by DNV and Lloyd's Register
- Drop-in compatible with Autronica AutroSafe and BS-420 panels
- Wide operating range: -20°C to +60°C, 10% to 93% RH
- Low standby current (< 0.5 mA) for efficient loop design
- Visible red LED alarm indicator for fast visual verification
Why Choose the Autronica BHH-31A?
Industry-leading fire detection technology engineered for reliability in the most demanding environments.
Optical Smoke Detection
Advanced light-scattering technology for early detection of slow-burning, smoldering fires with minimal false alarms.
Marine & Industrial Approved
Fully certified for maritime and industrial installations, meeting the strictest international safety standards.
Fast Response Time
Rapid detection capabilities ensure immediate alerting, minimizing response time in critical fire situations.
Easy Installation
Plug-and-play compatibility with Autronica fire alarm systems. Simple base mounting for quick setup and maintenance.
Wide Operating Range
Operates reliably across a broad temperature range, suitable for harsh environments from -20°C to +60°C.
Built-in LED Indicator
Visible red LED indicator for easy status monitoring, alarm signaling, and system diagnostics at a glance.
Technical Specifications
Complete technical details of the Autronica BHH-31A optical smoke detector.
| Parameter | Value |
|---|---|
| Model | BHH-31A |
| Manufacturer | Autronica Fire & Security |
| Detection Type | Optical Smoke Detection |
| Operating Voltage | 15–30 VDC |
| Standby Current | < 0.5 mA |
| Alarm Current | < 30 mA |
| Operating Temperature | -20°C to +60°C |
| Humidity Range | 10% to 93% RH (non-condensing) |
| Dimensions | Ø 100 mm × 50 mm (H) |
| Weight | Approx. 120 g |
| Color | White |
| Mounting | Standard Autronica Base |
| Indicator | Red LED (alarm) |
| Certifications | EN54-7, Marine Approved, DNV, Lloyd's |
| Application | Commercial, Industrial, Marine |
| Compatibility | Autronica AutroSafe, BS-420 Series |
System Compatibility
The BHH-31A mounts on the standard Autronica detector base and is supported across the Autronica addressable panel range.
AutroSafe
Fully supported on all current AutroSafe loop cards. Addressable.
BS-420
Drop-in replacement on existing BS-420 loops using the standard base.
Standard Autronica base
Mechanically compatible — no base change required for retrofits.
Frequently Asked Questions
Everything you need to know about the Autronica BHH-31A smoke detector.