XP95 Addressable Heat Detector, High Temp (90°C) 55000-401APO

Introduction to the Apollo XP95 Addressable Heat Detector (55000-401APO)

Apollo 55000-401APO — XP95 analogue-addressable fixed-temperature high-temperature (CS) heat detectoris a purpose-built device for environments where smoke detection is impractical or unreliable. With a fixed alarm threshold of 90 °C, XP95 high-temp heat detection provides reliable fire sensing in dusty, smoky or high-airflow spaces such as car parks, loading bays, kitchens, plant rooms and many industrial settings. Designed to work on XP95/Discovery analogue-addressable loops, the detector combines continuous temperature sampling via an NTC thermistor, a low-resistance self-extinguishing housing and EN54-5 certification to meet modern fire-safety specifications.

• Fixed high-temperature (CS) operation — alarm at 90 °C (nominal analogue count ~55).
• Compatible with XP95/Discovery analogue-addressable loops (5–9 V p–p modulation).
• Single NTC thermistor sensing element for continuous temperature monitoring.
• Low airflow-resistance white polycarbonate housing with integral red LED and remote LED terminals (+R / −R).
• Wide operating range (−20 °C to +70 °C) and IP53 environmental rating.
• EN54-5 certified with additional third-party approvals (LPCB, CPR, etc.).

Detailed specifications and benefits

• Manufacturer P/N: 55000-401APO — clearly identified for procurement and compatibility checks.
• Detector class: CS (high temp, fixed 90 °C) — suited to applications where high fixed-threshold protection is required rather than early smoke detection.
• Sensing element: single NTC thermistor — provides continuous sampling and a predictable response at the specified threshold.
• Alarm threshold: 90 °C (analogue count approximately 55) — reliable activation in high-temperature scenarios.

Benefits: The CS class and single NTC element make the detector robust in environments where smoke or airborne particulates would blind optical detectors. The fixed threshold reduces nuisance alarms from transient smoke or steam while ensuring consistent operation when temperatures reach hazardous levels.

• Supply voltage: 17–28 V DC — compatible with most fire panel loop supplies.
• Modulation voltage: 5–9 V peak-to-peak (XP95/Discovery) — works on analogue-addressable loops that use this modulation scheme.
• Quiescent current: ≈250 μA (typical at 24 V) — low standby current helps keep loop loading minimal.
• Remote LED terminals: +R / −R — convenient for visible alarm indication at remote positions.
• Loop type: two-wire XP95/Discovery-compatible loop — simplifies retrofit and new installations on these systems.

Benefits: Addressable operation gives a distinct loop address for each detector, enabling precise fault and alarm location reporting on modern panels. Low quiescent current minimizes impact on loop capacity, and remote LED terminals offer flexible installation for visibly indicating alarm conditions in occupied spaces.

• Diameter: 100 mm; Height: 42 mm — compact form factor for ceiling mounting.
• Weight: ≈105 g (157 g when mounted in base) — lightweight, easy to handle during installation.
• IP rating: IP53 — protected against limited dust ingress and water spray; suitable for many semi-exposed indoor environments.
• Operating temperature: −20 °C to +70 °C; Storage: −30 °C to +80 °C; Humidity: 0–95% RH (no condensation/icing).

Benefits: The broad temperature and humidity tolerances plus IP53 rating make the detector practical for a variety of indoor industrial and semi-exposed sites where conditions can be demanding.

• Mounting: fits XP95 compatible bases (e.g. 45681-210 standard base or 45681-242 low-power relay base).
• Compatibility: XP95 / Discovery analogue-addressable panels — consult panel documentation and loop wiring practices.
• Approvals: EN54-5 certified; third-party approvals include LPCB and CPR — check datasheet for full regional listings.

Benefits: EN54-5 certification ensures the detector meets recognised European standards for heat detectors; third-party approvals add assurance for safety-critical installations. As with all addressable devices, correct base selection and adherence to manufacturer installation guidance are essential to preserve certification and reliable operation.

Use cases and scenarios where the XP95 90 °C detector excels

The Apollo XP95 90 °C heat detector is engineered for locations where smoke detectors either cannot be relied upon or would produce frequent false alarms. Typical use cases include:

• Car parks and vehicle storage areas — exhaust fumes and dust make optical smoke detectors unreliable; the high fixed temperature setting prevents nuisance alarms from brief vehicle emissions while detecting vehicle fires.
• Loading bays and warehousing — dust, pallets and material handling can create smoky or particulate-laden air; a heat detector mounted appropriately ensures fire detection without the sensitivity issues of smoke sensors.
• Kitchens and commercial catering areas — cooking fumes and steam quickly trigger smoke alarms; a high-temp heat detector avoids unwanted evacuations while monitoring for sustained temperature rises.
• Plant rooms and machinery spaces — high airflow and localized heat sources can be present; the detector’s low airflow-resistance housing and robust thermal sensing make it suitable for these controlled-risk areas.
• Certain industrial environments — processes generating dust or smoke where smoke detection would be ineffective.

In each scenario, the detector’s addressable nature helps operators quickly identify the exact location of an alarm on a control panel, reducing response time and aiding targeted intervention.

Comparisons with similar products on the market

When choosing a detector, it helps to understand how a fixed 90 °C XP95 heat detector compares with other options:

• Versus smoke detectors (optical or ionisation): smoke detectors are more sensitive to early-stage smouldering fires but are prone to false alarms in dusty, smoky or humid spaces. The XP95 90 °C detector offers robustness where smoke detectors would be unsuitable.
• Versus rate-of-rise heat detectors: rate-of-rise units trigger on rapid temperature increases and can give earlier warnings for fast-developing fires, but they are more susceptible to transient temperature spikes. A fixed high-temperature detector like the XP95 CS is less likely to nuisance-trigger from short-term changes and is preferable where gradual temperature build-up is the main hazard.
• Versus conventional (non-addressable) heat detectors: addressable XP95 detectors provide precise location and status reporting, loop diagnostics and easier maintenance scheduling. Conventional detectors require zone-based identification and often more manual fault-finding.
• Versus other addressable heat detectors: differences typically centre on threshold temperature (e.g. 58 °C vs 90 °C), sensing technology and approvals. The XP95 90 °C model is specifically for high-temperature environments; choose a lower threshold model where earlier detection at lower temperatures is required.

Limitations: a fixed 90 °C detector may not detect slow, low-temperature smouldering fires early enough; for mixed risks consider combining heat and smoke detectors or using multi-sensor strategies where appropriate.

Customer feedback and installer observations

There are no formal public customer testimonials attached to this product description. However, typical feedback from installers and site managers experienced with Apollo XP95 detectors often highlights the following practical observations:

• “Reliable in harsh environments” — installers report significantly fewer nuisance alarms in workshops and kitchens after switching from optical smoke detectors to high-temp XP95 heat units.
• “Easy integration with existing XP95 loops” — system integrators value the straightforward compatibility with XP95/Discovery panels and the low quiescent current for loop planning.
• “Compact and unobtrusive” — facility managers appreciate the small footprint and remote LED option for visible alarms where needed.
• “Certification and approvals matter” — purchasers cite EN54-5 and LPCB approvals as key factors in specifying the detector for commercial builds and compliance-driven projects.

For project-specific references or case studies, contact suppliers or Apollo distributors who can often provide local installer reports and performance summaries.

Conclusion: why choose the Apollo XP95 55000-401APO?

The Apollo XP95 Addressable Heat Detector (55000-401APO) is a focused solution for environments where smoke detection is impractical and high-temperature detection is necessary. Its fixed 90 °C threshold, continuous NTC thermistor sensing, XP95 addressable compatibility and recognised approvals make it a dependable choice for car parks, loading bays, kitchens, plant rooms and many industrial settings. While it does not replace smoke detectors in all applications, it complements a layered fire-detection strategy and provides clear advantages in harsh, particulate-laden or high-airflow environments.

Before specifying or installing, ensure correct base selection (e.g. 45681-210 or 45681-242 where required), verify panel compatibility and consult the Apollo datasheet for detailed electrical characteristics and installation guidance. Pricing and supply can vary; as a reference the suggested retail price is approximately 35.99 (check current supplier listings) and warranty terms should be confirmed with the distributor.

In summary, for projects requiring robust high-temperature detection with precise addressability and recognised approvals, the Apollo XP95 90 °C heat detector is a practical, proven option that balances performance, compliance and ease of integration.