The AT-FD02-IR3 Triple Infrared Flame Detector is a point-type flame detector designed for industrial and hazardous-area fire detection applications. It uses three infrared pyroelectric sensors operating in different wavelength bands to detect flame radiation characteristics accurately.
With professional circuit design and advanced flame signal processing algorithms, the detector provides stable long-distance flame detection while improving resistance to false alarms. It is suitable for applications where fast flame detection is required before smoke or heat reaches conventional detectors.
The AT-FD02-IR3 provides fire alarm relay output, fault relay output, and independent 0–20mA current loop output, making it easy to integrate with fire alarm control panels, gas suppression systems, PLC, DCS, BMS, and industrial fire and gas monitoring systems.
For outdoor or semi-outdoor installation, an optional weather protection cover can be added to help reduce direct rain, sunlight, dust, and environmental impact on the detector body.
Technical Specifications:
Model: AT-FD02-IR3
Detection Principle: Triple infrared flame detection
Spectral Range: 3.8–5.0μm
Field of View: 100°
Detection Distance: Up to 50m for 0.3m × 0.3m n-heptane fire
Sensitivity: Multi-level adjustable by magnetic tool
Operating Voltage: DC 24V, operating range DC 18–30V
Operating Current, Relay Type: Standby ≤25mA, fire alarm ≤35mA
Operating Current, Current Loop Type: Standby ≤30mA, fire alarm ≤55mA
Current Loop Output: Fault ≤2mA, normal 4mA, fire alarm 20mA
Relay Output: Fire alarm relay and fault relay
Operating Temperature: -40°C to +70°C / optional -40°C to +80°C
Storage Temperature: -40°C to +85°C
Operating Humidity: 0–96% RH, non-condensing; short-term 100% condensing humidity
Explosion-Proof Marking: Ex db IIC T6 Gb / Ex tb IIIC T80°C Db
Ingress Protection: IP66 / IP67
Housing Material: 316L stainless steel
Electrical Interface: 2 × 3/4 NPT, M25 × 1.5, G3/4
Weight: Approx. 3kg
Mounting Accessory: Stainless steel mounting bracket
Optional Accessory: Weather protection cover / rain cover
Detection Distance Reference:
n-Heptane: 0.3m × 0.3m, up to 50m
Gasoline: 0.3m × 0.3m, up to 40m
Diesel: 0.3m × 0.3m, up to 35m
Kerosene: 0.3m × 0.3m, up to 35m
Alcohol: 0.3m × 0.3m, up to 30m
Paper: 0.5m × 0.2m, up to 25m / 30m
Methane: up to 30m / 20m depending on flame size
Output and System Integration:
The AT-FD02-IR3 flame detector supports multiple signal outputs for industrial fire alarm and fire & gas detection systems.
Available outputs include:
Fire alarm relay output
Fault relay output
0–20mA current loop output
It can be connected with:
Fire alarm control panel
Gas suppression control panel
PLC system
DCS system
BMS system
Fire and gas detection system
Remote alarm monitoring system
Optional Weather Protection Cover:
For outdoor flame detection, the detector can be installed with an optional weather protection cover. The cover helps protect the detector from direct rain, sunlight, dust, and harsh outdoor environmental conditions.
Recommended outdoor applications with weather cover:
Outdoor fuel storage area
Oil and gas loading area
Chemical plant outdoor process area
Generator outdoor enclosure
Transformer yard
Open industrial production area
Marine or coastal industrial site
Outdoor hazardous area flame detection point
Typical Applications:
Oil and gas facilities
Petrochemical plants
Chemical storage areas
Fuel storage tanks
Fuel loading and unloading stations
Diesel generator rooms
Gas stations
Paint rooms and solvent storage areas
Power plants
Transformer areas
Industrial warehouses
Hazardous industrial zones
