Introduction to the AlarmSense Sounder Base (45681-510APO)
The AlarmSense Sounder Base (45681-510APO) is a compact, cost-effective mounting base that integrates an audible sounder with Apollo AlarmSense two-wire detectors. Certified to EN54-3 for sounders, this product delivers a reliable, standards-compliant alarm output while simplifying installation and reducing the need for separate devices. Designed for monitored two-wire systems, the base offers selectable volume settings, detector-presence monitoring and straightforward ceiling mounting — features that make it well suited to a wide range of commercial and light-industrial applications.
Key features at a glance
- EN54-3 certified:Meets relevant European standards for fire alarm sounders.
- Two-wire, polarity-insensitive wiring:Simplifies installation and reduces labour.
- Selectable volume:Low ~70 dB(A) and High ~87 dB(A) settings to suit different environments.
- Detector-removal monitoring:Reports unauthorised or accidental removal as a fault while continuing to sound.
- Quick ceiling mounting:Detector plugs into the base for neat, co-located detection and alarm.
- Variants and options:Sounder base (45681-510APO) and sounder + visual indicator (45681-509APO); red and white caps for stand-alone use.
Detailed specifications and benefits
- Operating voltage:18–33 V DC (sounder active); sounder remains off below ~15 V DC. This wide operating range allows compatibility with typical fire panel outputs and ensures reliable operation under varying supply conditions.
- Alarm current:Approximately 5 mA active at 24 V, meaning the device draws minimal loop current while providing a strong audible output when required.
- Quiescent current:Less than 20 µA at 12 V DC, which is negligible for loop budgeting and helps preserve system standby power.
- Wiring:Simple 2-wire monitored connection, polarity-insensitive, reducing installation errors and speeding deployment.
- Sound pressure level (SPL):Low ≈70 dB(A); High ≈87 dB(A). The two-level setting allows installers to match the alarm level to the environment — lower for quieter areas, higher for noisy or larger spaces.
- Selectable volume:Choice of Low or High gives flexibility to meet local regulations and occupant needs while minimising nuisance disturbance.
- Dimensions:115 mm diameter × 40 mm depth (without detector) — compact profile suitable for most ceiling voids.
- Weight:Approx. 150 g — lightweight for simple handling and mounting.
- Housing:White polycarbonate with optional red cap, durable and visually unobtrusive in most interiors.
- Mounting:Ceiling-mounted; detector plugs into the base for a neat, integrated appearance.
- Approval:EN54-3 certified (sounder). Certification provides assurance of performance and can simplify regulatory acceptance in many jurisdictions.
- Detector-removal monitoring:The base monitors detector presence and reports unauthorized removal as a fault, improving system integrity and maintenance awareness. If the detector is removed, the sounder can continue to operate so the alarm signal remains audible at that location.
- Variants:The VID (visual indicator) variant adds a visual element for applications needing both audible and visual alerts, such as noisy environments or where hearing-impaired occupants are present.
Use cases and scenarios where the AlarmSense Sounder Base excels
The AlarmSense Sounder Base is particularly effective in installations where co-located detection and audible signalling simplify design and reduce component count. Typical use cases include:
Offices, retail stores, restaurants and medical clinics benefit from the compact footprint and two-wire simplicity. The base reduces ceiling clutter by combining functions into a single mounted device and lowers wiring complexity for straightforward fit-outs and retrofits.
In environments with many individual rooms, the integrated sounder base reduces labour and material costs per room. The selectable volume helps adapt the output to corridors or individual rooms where different alarm levels are desirable.
Where regular maintenance and device checks are required, detector-removal monitoring delivers an important safety benefit by flagging missing detectors so faults can be rectified quickly. The optional visual indicator variant can support evacuation of noisy spaces like gyms or workshops.
For projects upgrading conventional fire systems, the two-wire AlarmSense base provides a low-disruption route to improved functionality without extensive rewiring. Its shallow depth and simple mounting suit older ceilings and constrained voids.
Comparisons with similar products and approaches
When evaluating the AlarmSense Sounder Base against other approaches, three common alternatives arise: separate detector and sounder installations, addressable multi-function detectors, and non-monitored conventional bases. Key differences include:
- Integrated sounder bases vs separate devices:Using a combined base reduces parts count, ceiling penetrations and wiring runs compared with installing a separate detector and a remote or surface-mounted sounder. This simplifies installation and can lower total project cost.
- Two-wire monitored bases vs addressable multi-function detectors:Addressable multi-function detectors provide additional features and per-device identification, but they require compatible panels and typically higher cost. The AlarmSense two-wire approach offers an economical, standards-compliant solution that still provides essential monitoring and audible output for many installations.
- Monitored vs non-monitored bases:The removal monitoring built into the AlarmSense base adds maintenance and security value over non-monitored conventional bases, reducing the risk of unreported device removals or tampering.
Compared with other manufacturers’ sounder bases, the AlarmSense device stands out for its EN54-3 certification, low quiescent current for easy loop budgeting and the balance between cost and functionality. For projects prioritising cost-efficiency and simplicity, the AlarmSense base is a compelling choice; for projects requiring advanced addressing and analytics, a fully addressable detector platform may be preferred.
Customer feedback and installer impressions
Official published customer testimonials for this specific model are not provided here. However, installers and facilities professionals working with integrated sounder bases commonly report the following practical benefits, which are relevant to the AlarmSense model:
- "Installation time is noticeably shorter than deploying separate sounders — fewer holes and less wiring to run."
- "Selectable volume is useful when one building contains a mix of quiet office spaces and louder service areas."
- "Detector-removal monitoring gives peace of mind; missing detectors are flagged so maintenance can be scheduled promptly."
These representative remarks reflect the typical advantages that integrated, monitored sounder bases provide in real-world deployments. For formal references, installers should consult case studies or supplier-supplied references specific to a vendor or integrator.
Practical considerations for purchase and installation
- Pricing:Suggested price: 36.99 (as provided). The product offers a competitive price point for a standards-compliant, integrated sounder base.
- Installation:Should be carried out by a competent person in accordance with the manufacturer datasheet, local building and fire regulations, and recognised wiring practices. Wiring diagrams, declared sound level data and full installation instructions are available from Apollo datasheets.
- Warranty and support:Warranty information is not specified in the supplied data; purchasers should confirm warranty and technical support details with the supplier or manufacturer prior to purchase.
Conclusion: Why choose the AlarmSense Sounder Base (45681-510APO)?
The AlarmSense Sounder Base 45681-510APO is a practical, standards-compliant solution for projects that need reliable audible signalling combined with detector mounting. Its EN54-3 certification, low power consumption, two-wire monitored wiring and detector-removal monitoring combine to offer strong safety and maintenance advantages. The selectable 70/87 dB(A) volumes and compact form factor make it flexible for a wide range of environments — from offices and hotels to schools and retrofit projects.
For integrators and building owners seeking a balance of affordability, regulatory compliance and straightforward installation, the AlarmSense base represents a solid choice. For sites requiring visual signalling, the VID variant (45681-509APO) or the use of red/white caps offer options to tailor the device to the application. Always confirm installation requirements, loop design and declared sound levels with the Apollo datasheet and engage competent installers to ensure optimal performance and compliance.
