Finder FF OT1000 Conventional Combined Smoke and Heat Detector

What Is the Finder FF OT1000 Combined Smoke and Heat Detector?

The Finder FF OT1000 is a conventional combined (multisensor) fire detector that integrates optical smoke detection and heat-rise detection technologies in a single housing. It continuously monitors for different types of fire risks in enclosed spaces, including slow-smouldering fires and fires involving a rapid rise in temperature, providing a fast and reliable signal to the conventional fire alarm control panel.

Operating Principle

The device has a dual-sensor detection mechanism:

• Optical Detection: The infrared LED and receiver inside the chamber operate on the light-scattering principle. Smoke is detected when smoke particles enter the chamber and scatter the light.

• Thermal Detection: The detector's sensitive thermistor continuously measures the ambient temperature and the rate of temperature rise. The system is triggered when the specified temperature threshold is reached or when the temperature rises rapidly.

When either or both detection criteria are met, the device enters the alarm state, increasing the current drawn on the conventional zone and alerting the panel.

The Role of Fire Detection Systems

In locations containing various combustible materials, where fire types may vary, using only one type of detector may not be sufficient. Combined smoke and heat detectors are a critical part of a fire protection strategy, helping to detect fires at an early stage, whether they begin as smouldering fires or develop into fast-burning, high-temperature fires.

Why Choose It?

• Dual Detection Technology: Provides both optical and thermal detection in a single device, offering enhanced protection and cost savings.

• High Fault Tolerance and Stability: Advanced software and physical filtering minimise false alarms in challenging environments where standalone smoke or heat detectors may give false alarms.

• 360° LED Visibility: The dual LED indicators on the housing make the device status (normal/alarm) clearly visible from any direction.

• Easy Integration: Fully compatible with all standard conventional panels.

Installation Details

The Finder FF OT1000 has a bayonet locking system that allows it to be easily fitted to a compatible conventional detector base. For ceiling installation, it should be positioned away from air vents with strong airflow and close to the centre of the room. Wiring is connected via the screw terminals on the base, in accordance with the conventional zone wiring diagram.

Technical Specifications

• Operating Voltage: 12 - 30 V DC

• Quiescent Current: < 60 µA

• Alarm Current: 20 - 40 mA (Limited)

• Detection Type: Optical Smoke + Heat (Combined / Multisensor)

• Operating Temperature: -10°C to +50°C

• Temperature Threshold: Class A2S / BS (static and rate-of-rise temperature detection in accordance with the standards)

• Humidity Tolerance: 95% RH (non-condensing)

• Protection Rating: IP30

• Housing Material: ABS plastic (flame-retardant, white)

• Dimensions: 100 mm (diameter) x 48 mm (height)

• Compliance Standards: Complies with EN 54-5 and EN 54-7 standards

Applications

• Hotel rooms, corridors and communal areas

• Areas near restaurant kitchens and dining halls

• Offices, administrative buildings and meeting rooms

• Archive rooms, warehouses and logistics centres

• Workshops and manufacturing facilities

• Homes and communal living areas

Frequently Asked Questions

Can the Finder FF OT1000 detector be triggered by smoke alone or heat alone? Thanks to its combined (multisensor) design, an alarm can be triggered separately or jointly when the smoke concentration exceeds its threshold or the ambient temperature reaches the specified level.

Can the device be used in dusty or steam-producing areas? Although combined detectors are more resistant to false alarms than standard smoke detectors, heat detectors should be used instead in areas with very high levels of dust, oil or water vapour.