Crowcon FGard IR3 Flame Detector

  • Explosion proof
  • For hazardous industries
  • Intelligent heated optics

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The Crowcon FGard IR3 is a multi-spectrum infrared flame detector. It delivers superior performance detecting hydrocarbon liquid fuel and gas fires even at long distances.

The FGard IR3 provides top-class flame detection with intelligent heated optics for precise results and advanced optical verification to reduce false alarms.


The FGard IR3 delivers superior performance in the detection of hydrocarbon fires. The FGard IR3 utilises the latest IR flame detection algorithms to ensure maximum false alarm immunity.

The FGard IR3 has been independently tested to demonstrate it can detect a hydrocarbon fuel pan fire at nearly 200 feet in less than 5 seconds.

Multi-spectrum IR

60-metre flame detection range – Will detect all Hydrocarbon fires, which means no condensation forming on the window, improving reliability and performance across temperatures.

Fast detection time

Responds in less than 5 seconds to 0.1m² fire at 60 metres

Heated optics

Intelligent heated optics – No condensation/ice/water

Advanced optical verification – No reflector

Automatic test verifies the cleanliness of the lens and electronic circuitry: no reflector optical check and large optical surface results in far fewer false alarms.

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Stainless Steel IR3 flame detector
FD-IR3-SS-M25 Crowcon IR3 flame detector – Stainless steel M25
FD-IR3-SS-NPT Crowcon IR3 flame detector – Stainless steel 3/4″ NPT
Aluminium IR3 flame detector
FD-IR3-A-M25 Crowcon IR3 flame detector – Aluminium M25
FD-IR3-A-NPT Crowcon IR3 flame detector – Aluminium 3/4″ NPT
Flame detector accessories
FD-AC-01 Vertical to Horizontal Mounting Adaptor – IR3 Flame Detector
FD-AC-02 Standard Bracket 316 Stainless Steel – IR3 Flame Detector
FD-AC-03 Marine Bracket 316 Stainless Steel – IR3 Flame Detector
FD-AC-04 Detector Sealing Kit – Metric (Gland Seals and O-Ring Set) – IR3 Flame Detector
FD-AC-05 FDS Series Sunshield – IR3 Flame Detector
FD-AC-06 Crowcon flame detector – Flame simulator
FD-AC-09 2″ pole mount kit
FD-AC-10 3″ pole mount kit
FD-AC-11 4″ pole mount kit
FD-AC-12 Flame Simulator Spare Charger

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Title Size
FGard IR3 Datasheet 569 KB
FGard IR3 Manual 2 MB

Additional information

Weight 0.190 kg


Operating temp -60°C to +85°C (-76°F to +185°F)
Storage temp -76°F to +185°F (-60°C to +85°C)
Humidity 0-100 % RH (Non-condensing)
Operating voltage 24 Vdc Nominal – (Range 18 to 32 Vdc)
Power consumption 3W minimum (without heater), 15 W at 32 Vdc with heater on maximum.
Speed of response < 5 seconds (Typical)
Dimensions 100 mm Dia x 200 mm (4” Dia x 8” L)
Material Copper free aluminum or 316 stainless steel
Entry size 3/4 inch NPT or M25
Weight Alu 5.5 lbs (2.5 Kg) / SS 13.2 lbs (6.0kg)
Outputs Relay contacts (DPDT 2A at 30Vdc) – alarm and fault.
0-20mA plus fault alerts, HART®
Certifications Class 1 Div 1 Groups B, C, D T4 Ambient –50°C to +85°C
Class 1 Zone 1 AEx/Ex db IIC T4 Ambient –50°C to +85°C
ATEX II 2 G Ex db IIC T4
IECEx Ex db IIC T4 Ambient –60°C to +85°C
PESO Ex db IIC T4 Ta= -60°C to +85°C
CCC (China Fire Approvals) – Pending
GB-Ex of China – Pending
Performance approvals FM 3260
EN 54-10
Ingress – IP66 /NEMA 4X
SIL2 – IEC 61508

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