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The X3301 is a multispectrum infrared flame detector that uses patented signal processing to detect hydrocarbon fires while rejecting false alarm sources (hot CO₂, welding, sunlight, etc.). It provides very high-speed response and excellent detection range, making it one of the most trusted flame detectors in high-risk oil & gas and petrochemical facilities.
Technical Specifications
Parameter
Specification
Detection Technology
Multispectrum IR (3 IR bands)
Detection Range (n-heptane)
210 ft (64 m) on axis (1 ft² pan fire)
Field of View
110° horizontal × 75° vertical
Response Time
Typically < 0.5 seconds (standard test fires)
False Alarm Immunity
High (welding, hot CO₂, sunlight, heaters, etc.)
Operating Temperature
–55 °C to +75 °C (–67 °F to +167 °F)
Supply Voltage
24 Vdc nominal (18–32 Vdc)
Power Consumption
14 W nominal, 17 W max
Output
Relays, 4–20 mA, HART, Modbus (optional)
Approvals
FM, CSA, ATEX, IECEx, SIL 2 capable
Enclosure
Stainless steel or aluminum
IP Rating
IP66 / NEMA 4X
Application Industry
Offshore platforms & FPSOs
Refineries & petrochemical plants
LNG terminals & storage
Gas compressor stations
Hangars & turbine enclosures
Common Problems & Solutions
False alarms from hot surfaces or welding → Multispectrum IR + patented algorithms reject most sources
Slow detection in large areas → 210 ft on-axis range with fast response
Condensation/fogging in cold climates → Heated optics option available
Replacement Models
Older X3301 versions (pre-2015 firmware)
X3302 (multispectrum for hydrogen fires)
X3800 single IR detector (lower performance)
Why Buy From Us
Genuine Det-Tronics product with full factory warranty
Local technical support & commissioning assistance
Fast access to spares (lenses, electronics)
Competitive pricing on new & certified refurbished units