The Honeywell FS20X-211-23-6 is an FS20X multi-spectrum UV/dual IR flame detector in a copper-free, powder-coated aluminium enclosure, designed for hazardous area fire detection in refineries, offshore platforms, turbine enclosures, fuel storage and similar industrial sites.
It combines Honeywell's WideBand IR sensors with a solar-blind UV sensor and dual microprocessors for fast response and strong false-alarm rejection, and outputs to fire and safety systems through relays, a 0-20 mA signal or RS-485 Modbus.
Key features
- Multi-spectrum UV / dual IR / visible sensing with a solar-blind UV sensor
- Patented WideBand IR technology keeps detecting if the UV signal is degraded by smoke or lens contamination
- Detection range greater than 60 m to a 0.1 m² heptane fire (very high sensitivity)
- Four switch-selectable sensitivities
- Alarm, fault and fire verification relays
- Built-in RS-485 Modbus and 0-20 mA stepped output
- FirePic pre-fire data storage and event log with real-time clock
- Automatic optical path and electronic self-test
- Ex d ATEX/IECEx and FM hazardous area approvals; certified to EN 54-10
Technical specifications
- Field of view: 90° cone, ±45° from axis
- Sensitivity: very high (60 m), high (45 m), medium (30 m), low (15 m)
- Response time: 3-5 s to 0.1 m² n-heptane fire at 30 m; 3-10 s at 60 m
- Supply: 24 V DC nominal (18-32 V DC), regulated
- Current: 85 mA operating, 135 mA alarm (at 24 V DC); heater 155 mA additional
- Relay contacts: 1 A at 24 V DC
- Analogue output: 0-20 mA stepped, source or sink
- Operating temperature: -40 to +85 °C
- ATEX/IECEx: II 2 G Ex db IIC T4/T5/T6, II 2 D Ex tb IIIC T135 °C
- Enclosure rating: Type 4X, IP66
- Conduit entries: 2 x M25
- Enclosure: copper-free powder-coated aluminium
- Shipping weight: 1.6 kg
