The HW‑group Smoke Detector FDR26 is an optical smoke detector specifically designed for use in sensitive technical and industrial environments. Whether in climate-controlled server rooms, data centers, telecommunications stations, or critical industrial facilities – this sensor provides early fire warning through reliable optical smoke detection while minimizing false alarms, as it does not respond to temperature fluctuations.

The optical sensing chamber detects even the smallest smoke particles entering the chamber and activates a relay as well as a clearly visible red LED. Via digital inputs (dry contact), the Smoke Detector can be directly integrated into HW‑group systems such as Poseidon2, Ares, STE2, or Damocles, enabling real-time alarm transmission over LAN, GSM, or SNMP.

Optical Smoke Detection – Safe and Precise

At the core of the FDR26 is its precise optical detection chamber, which uses light scattering to detect combustion particles accurately. Unlike thermal detectors, the FDR26 does not react to temperature changes – a crucial advantage in air-conditioned environments with variable airflow.

This feature makes the sensor ideal for server and technical rooms where HVAC systems often cause temperature shifts that could lead to false alarms with standard fire detectors.

High Integration Capability

The Smoke Detector FDR26 is equipped with a relay output (max. 1A/30V DC or 0.5A/125V AC) that can be directly connected to the digital inputs of compatible HW‑group devices. These include Poseidon2, Ares, STE2, and Damocles. In combination with these systems, comprehensive fire safety solutions can be created that not only provide local alerts but also forward smoke alarms via network or mobile communications.

Test Function for Easy Maintenance

The “TEST” label on the sensor allows a magnet test to verify relay and electronic functionality without using actual smoke. This enables operators to conduct regular maintenance and functionality tests without disrupting normal operations or generating artificial smoke.

Easy and Standards-Compliant Installation

For optimal detection performance, the FDR26 should be centrally installed on the ceiling, at least 50 cm from corners. The maximum detection area per unit is 40 m² with a ceiling height of up to 7 m. In rooms longer than 10 m, multiple units should be installed. The recommended distance between detectors is no more than 8 m, and the maximum wall distance is 4 m.

Power is supplied via 10.5–14 V DC (typically 12 V DC) from an external power supply. Connection to monitoring systems such as Poseidon2 or Ares is made via digital inputs (dry contact).

Typical Application Areas

• Server rooms & data centers: Early warning of cable or hardware fires to protect equipment and data.
• Telecommunication rooms: Fire protection for critical infrastructure, even with strong temperature fluctuations.
• Industrial environments: Food factories, boiler rooms, or other technical facilities with variable ambient temperatures.
• IT hardware areas: Integration into existing monitoring and security systems for centralized alarm management.
• Remote monitoring: Automatic alerts via e‑mail, SMS, or SNMP trap directly to security personnel.

Technical Specifications

• Detection: Optical smoke sensing (particle light scattering)
• Alarm indication: Red LED, relay output (1A/30V DC, 0.5A/125V AC)
• Power supply: 10.5–14 V DC, typical 12 V DC
• Warm-up time: 60 seconds
• Detection area: Max. 40 m²
• Installation height: Up to 7 m
• Recommended spacing: 8 m between detectors, max. 4 m from walls
• Max. air velocity: 600 m/min
• Operating environment: –10 °C to +65 °C, 5 % to 95 % RH (non‑condensing)
• Protection class: IP20

Integration into HW‑group and Cloud Systems

In combination with Poseidon2, Ares, or STE2, the FDR26 can be integrated into local security networks or cloud-based monitoring solutions. The compatible HWg‑PDMS software enables storage and analysis of alarm data as well as export to Excel for documentation or reporting purposes. For mobile access, the SensDesk portal with iOS and Android apps allows remote checking of alarms and status data.

The HW‑group Smoke Detector FDR26 combines reliable optical smoke detection with high resistance to false alarms and flexible integration into professional security and monitoring environments. Its specific optimization for climate-controlled spaces makes it the ideal choice for operators of data centers, telecommunications stations, and technical industrial facilities who require precise early fire detection and easy maintenance.