Introduction to the product and its key features
Apollo 55000-390APO AlarmSense Optical Smoke Detectoris a compact, EN54-7 certified optical (photoelectric) detector engineered for reliable early detection of smouldering and slow-burning fires. Designed to work on AlarmSense two-wire monitored loops, the detector combines a chevron-style optical chamber, a wide operating voltage range (9 633 V DC) and an extremely low standby current (approximately 50 A at 15 V). Its modest dimensions (about 100 mm diameter 6 42 mm depth) and 360° LED status indication make it an unobtrusive, easy-to-install choice for residential properties and small-to-medium commercial environments.
- Detection principle:Optical/photoelectric (chevron chamber) for effective smouldering-fire detection.
- Certification:EN54-7 third-party certification.
- Electrical:9 633 V DC supply; polarity-insensitive 2-wire connection; quiescent current 50 A @ 15 V.
- Form factor:Compact white polycarbonate housing with 360° LED indicator.
- Reliability:Manufacturer-stated 10-year warranty.
Detailed description of the product's specifications and benefits
The 55000-390APO packs a focused set of specifications that address the most common needs for domestic and light commercial fire detection. Below is an accessible breakdown of its principal technical attributes and the practical benefits each delivers.
- Manufacturer / Part:Apollo 55000-390APO.
- Detection principle:Optical (photoelectric), chevron chamber
- Intended use:Residential and small-to-medium commercial installations.
- Warranty:10 years.
The optical chevron chamber is particularly sensitive to light scattering from smoke particles produced by smouldering fires (e.g., overheated fabrics, wiring insulation or slow-developing combustion). This makes the detector well suited to bedrooms, living areas and other spaces where smouldering fires are more likely than fast flaming events.
- Supply / Operating Voltage:9 633 V DC
- Polarity:L1 & L2 polarity-insensitive (2-wire monitored loop).
- Quiescent Current:50 A @ 15 V (very low standby draw).
- Alarm Current & Reset:Alarm currents vary with voltage; consult the official datasheet for exact curves. Typical alarm current examples and reset thresholds are provided by Apollo.
- Supply Interruption Tolerance:Short interruption tolerance (approx. 40 ms) to reduce nuisance alarms during brief supply disturbances (consult datasheet for exact figures).
The low quiescent current is an important advantage when many detectors share a loop or when overall panel supervision budgets are constrained. The wide operating voltage range increases compatibility with a variety of control panels and power arrangements. Polarity-insensitive wiring simplifies installation and reduces errors during commissioning.
- Dimensions:9 100 mm diameter 6 42 mm depth (detector only).
- Housing:White polycarbonate with 360° LED indicator for clear status visibility from any angle.
- IP Rating:Not consistently stated by the manufacturer; some resellers list IP44. Confirm via official datasheet before specifying for wet or marina environments.
- Certification:EN54-7 certified (third-party).
EN54-7 certification demonstrates compliance with European standards for point-type smoke detectors and provides confidence for regulatory and specification purposes. The 360° LED enhances visibility in corridors and escape routes—useful for rapid status checks during maintenance rounds or in an alarm condition.
Use cases and scenarios where the product excels
The Apollo AlarmSense optical detector is especially effective in environments where early detection of smouldering combustion is the priority. Typical applications include:
- Bedrooms and living spaces:Sensitive detection of slow-burning materials like bedding, upholstery and curtains.
- Escape routes and corridor coverage:Compact size and all-around LED make it suitable for corridors and stairwells where clear visual indication is important.
- Care homes and HMOs:Environments with sleeping occupants or limited mobility benefit from early, sensitive smoke detection.
- Education and offices:Classrooms, small offices and ancillary areas where EN54-7 certification is required.
- Light commercial and retrofit projects:The wide voltage tolerance and polarity-insensitive wiring simplify upgrades on existing two-wire AlarmSense loops.
For installers and facilities managers, the detectors low standby current and compatibility with AlarmSense bases make it a practical choice for longer loops or larger circuits where total loop current needs careful management.
Comparisons with similar products in the market
When evaluating the 55000-390APO against other detectors, consider three main axes: detection principle, certification, and installation compatibility.
Optical versus ionization or heat detection:Optical/photoelectric detectors like the Apollo unit outperform ionization detectors in detecting smouldering and smoky fires, while ionization can be faster on very fast flaming fires (e.g., paper/gas). Heat detectors react to temperature rise and are used where smoke detectors could cause nuisance alarms (kitchens, garages). Choosing the right detector type depends on the risk profile of the protected space; for most domestic and many commercial spaces, optical detectors are the preferred general-purpose choice.
EN54-7 certification:Not all smoke detectors are EN54-7 certified. The Apollo units certification positions it for use in regulated installations where standard compliance is required. When comparing, check that competing models hold equivalent third-party certification.
Installation and power characteristics:The Apollos 9 633 V DC range and low quiescent current compare favorably to many alternatives that may require tighter voltage windows or draw higher standby current. The detectors AlarmSense two-wire compatibility is a defining factor—if your control panel and loop architecture are AlarmSense-compliant, this detector integrates more seamlessly than generic devices that need additional interfaces or different bases.
Customer testimonials and reviews (representative feedback)
Below are representative, anonymized pieces of feedback that reflect common themes reported by installers and end-users. These are not verbatim endorsements but illustrative of usual experiences with this type of product.
- Installer feedback:"Easy to wire and commission on AlarmSense loops. The low quiescent current helps when we populate long loops with many sensors—keeps loop loading manageable."
- Property manager:"Good balance of sensitivity and nuisance immunity. The 360° LED makes routine checks faster because you can see status from the corridor without standing directly beneath the unit."
- Care home operator:"We specified optical detectors throughout sleeping areas and saw better early alerts for smouldering incidents compared with older units. Also appreciated the EN54-7 certification for compliance."
For authoritative, site-specific user reviews consult reseller pages or request installer case studies from Apollo distributors.
Conclusion: Why this product is a great choice
The Apollo 55000-390APO AlarmSense Optical Smoke Detector is a purpose-built, cost-effective smoke detector tailored to residential and light commercial needs. Its EN54-7 certification, optical chevron chamber optimized for smouldering fires, very low standby current and wide supply voltage range make it a practical and flexible option for modern two-wire AlarmSense systems. The compact form factor with a 360° LED indicator and a manufacturer-backed 10-year warranty further enhance its appeal.
When selecting smoke detection components, always confirm panel compatibility, consult the official Apollo datasheet for alarm current curves and wiring diagrams, and have installation performed by a competent engineer in accordance with relevant national standards (for example BS 5839-1 in the UK). Priced to offer good value (suggested retail price 15.99) and backed by recognised certification, the 55000-390APO is an excellent choice for projects that prioritise reliable smouldering-fire detection, straightforward installation and regulatory compliance.
