Discovery Multisensor Detector (Optical + Thermistor) 58000-700APO

Introduction to the Discovery Multisensor Detector (Optical + Thermistor) 58000-700APO

The Discovery Multisensor Detector 58000-700APO is an addressable fire detector that combines a photo-electric (optical) smoke chamber with a thermistor heat sensor to deliver reliable, low-nuisance detection for a wide range of applications. Designed by Apollo for modern fire-detection systems, this multisensor unit offers five selectable response modes, automatic drift compensation, low quiescent current for efficient loop loading, and broad approvals including EN54-5 and EN54-7. Whether you are specifying equipment for hotels, hospitals, offices, or warehouses, the Discovery 58000-700APO is built to perform where accurate and timely detection matters.

Key Features at a Glance

• Dual sensing:photo-electric smoke sensor plus thermistor heat sensor for improved detection and fewer false alarms.
• Selectable response modes:five operating modes including pure smoke and pure heat settings to tune behaviour to the environment.
• Automatic drift compensation:maintains long-term sensitivity and reduces maintenance intervention.
• Addressable Discovery protocol:low quiescent current (~470 µA at 24 V) for efficient loop loading and wide system compatibility (many resellers list XP95/CoreProtocol compatibility).
• Robust approvals:EN54-5 and EN54-7 certified, plus national listings (LPCB, VdS, CPR and others).

Detailed Specifications and Benefits

Understanding the technical specifications helps explain why the Discovery 58000-700APO is a practical choice for many installations. Below are the essential specifications followed by the benefits they deliver in real-world use.

• Product code:58000-700APO
• Detector type:Discovery multisensor (optical + thermistor)
• Detection principle:Photo-electric (light scatter) smoke chamber + thermistor temperature sensor
• Dimensions:100 mm diameter × 50 mm high (detector only); ≈58 mm high fitted in base
• Weight:≈105 g (detector only); ≈160 g fitted in base
• Supply voltage:17–28 V DC
• Quiescent current:≈470 µA (at 24 V DC)
• Analogue values:Nominal analogue value 23 (±); alarm at analogue value 55
• Heat classification:A1R
• Operating temperature:−40 °C to +70 °C
• Humidity:0–95% RH (non-condensing)
• IP rating:IP44
• Material:White polycarbonate housing; nickel-plated stainless steel terminals
• Indicators / terminals:Red alarm LED; remote LED terminals (+R / −R)
• Response modes:Five selectable operating/response modes (including pure smoke / pure heat)
• Drift compensation:Automatic drift compensation for long-term stability
• Protocol / compatibility:Addressable Discovery protocol (many resellers list XP95/CoreProtocol compatibility)
• Approvals / standards:EN54-5 and EN54-7; CPR and national approvals (LPCB, VdS and others listed by distributors)

• Improved detection accuracy:By combining optical and thermal sensing, the detector can recognise both smouldering and flaming fires more reliably than single-sensor devices. This dual approach increases the likelihood of early detection across a broader range of fire types.
• Reduced false alarms:Selectable response modes let installers tune the detector to environmental conditions—reducing nuisance alarms from dust, steam or transient heat sources in spaces such as kitchens, corridors or industrial zones.
• Lower maintenance:Automatic drift compensation keeps sensitivity within operational limits, which reduces the frequency of manual recalibration or cleaning and supports predictable lifecycle costs.
• Efficient loop loading:Low quiescent current means more devices can be connected to the same loop without overloading the fire panel, simplifying wiring and lowering installation cost.
• Regulatory confidence:EN54 approvals and national listings allow use in projects that demand recognised standards, easing certification during handover for commercial and public buildings.

Use Cases and Scenarios Where This Detector Excels

The Discovery 58000-700APO is versatile and performs well in locations where a balance between sensitivity and immunity to false alarms is needed. Typical use cases include:

• Guest rooms and corridors benefit from multisensor detection because both smouldering bedding or electrical faults (optical) and rapid temperature rises (thermistor) can be detected promptly. Selectable modes reduce alarms triggered by toasters, hairdryers or steam.

• Hospitals and clinics demand reliable detection with low nuisance alarms to avoid disrupting patients and staff. The detector’s drift compensation and multiple operating modes help maintain consistent performance in wards, treatment rooms and corridors.

• Office spaces and clean rooms often contain electronic equipment and controlled atmospheres. The multisensor approach improves detection of both smouldering cables and fast-developing fires while limiting false activations caused by cooking areas or HVAC-related particulates.

• Where dust, vehicle movement or localized heating is present, selecting an appropriate response mode allows the detector to remain sensitive to genuine fires while tolerating benign environmental changes.

How It Compares With Similar Products

Multisensor detectors are available from several manufacturers. Here’s how the Discovery 58000-700APO stacks up against common alternatives.

• Single-sensor optical detectors are effective for many smoke-producing fires but can be more prone to false alarms where dust or steam is present. The Discovery multisensor combines optical and thermal data to improve detection fidelity and reduce nuisance alarms.

• Many competitors offer multisensor devices, but the Discovery detector’s advantages include proven EN54-5/EN54-7 certification, automatic drift compensation and a low quiescent current that maximises loop capacity. Some alternative products may offer similar sensing but differ in approvals, protocol compatibility or drift-management features.
• Systems from manufacturers such as Honeywell, Hochiki and System Sensor offer comparable multisensor options; the choice often depends on system compatibility, site-specific approvals and installer preference. Discovery’s wide distribution and compatibility with Discovery/XP95-style protocols make it an easy fit for many existing addressable systems.

Customer Feedback and Installer Experience

While specific customer testimonials vary by site, common themes emerge from installers, system integrators and facilities managers who specify Discovery multisensor detectors:

• Installers appreciate the detector’s compact form factor, clear remote LED terminals and low current draw which simplifies loop design.
• Facilities teams report fewer nuisance alarms after tuning the detector’s response mode—especially in hospitality and healthcare environments where false activations are disruptive.
• Maintenance contractors value the automatic drift compensation because devices remain within sensitivity limits for longer, reducing manual cleaning and recalibration visits.

These recurring observations reflect the product’s design goals: accurate detection, reduced maintenance overhead and flexible configuration to suit varied environments.

Installation, Compliance and Maintenance Notes

The Discovery 58000-700APO is certified to EN54-5 and EN54-7 and carries several national approvals, which supports its use in regulated projects. However, correct installation, commissioning and ongoing maintenance are essential for reliable operation. Key points to remember:

• Installation and commissioning should be performed by a qualified fire-alarm engineer in accordance with local codes and the official Apollo datasheet.
• Always isolate the supply before installation or service to ensure safety.
• Follow manufacturer guidance on mounting height, spacing and response-mode selection to match the protected environment.
• Periodic functional checks and sensitivity tests are recommended; automatic drift compensation reduces but does not eliminate the need for routine maintenance.

Conclusion: Why Choose the Discovery 58000-700APO?

The Discovery Multisensor Detector (Optical + Thermistor) 58000-700APO is a balanced, proven solution for modern addressable fire systems. It pairs optical and thermal sensing to detect a broader range of fire conditions while offering selectable response modes to minimize nuisance alarms. Automatic drift compensation and a low quiescent current help lower lifecycle costs and simplify system design, and broad approvals provide regulatory confidence for commercial and public projects.

For installers and specifiers seeking a flexible multisensor detector with strong performance, established approvals and compatibility with popular addressable protocols, the Discovery 58000-700APO remains a compelling choice. Its adaptability across hotels, hospitals, offices, warehouses and many other environments makes it a reliable component in comprehensive fire-detection strategies.