Honeywell FS20X-211-24-6 Flame IR2/UV 60m Zone 1 Stainless Steel

The Honeywell FS20X-211-24-6 is an FS20X multi-spectrum UV/dual IR flame detector in a 316 stainless steel 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: 316 stainless steel
• Shipping weight: 3.2 kg