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Spectrex Inc.

20/20ML Mini UV/IR Flame Detector

Low cost, compact and lightweight UV/IR dual-sensor with high-speed response and large field of view

Have questions? We're here to help!
Have questions? We're here to help!

The low cost, compact, lightweight 20/20ML UV/IR Flame Detector comprises both UV and IR sensors, detecting hydrocarbon-based fuel and gas fires, hydroxyl and hydrogen fires, as well as metal and inorganic fires at distances up to 50 ft (15 m). The UV sensor incorporates a special logic circuit that helps prevent false alarms caused by solar radiation. Simultaneous detection of radiant energy in both the UV and IR sensors triggers an alarm signal.

• UV/IR Dual-Sensor 
• High-Speed Response 
• 50 msec Response to Saturated Signal 
• Large Field of View (100° horizontal/vertical) 
• User Programmable Functions Configurable via software from a PC or handheld device 
• Immune to False Alarms (solar blind) 
• Automatic and Manual Built-In-Test (BIT)
• Standard 4-wire Connection
• 4-20mA source (3-4 wires) configuration 
• RS-485 Modbus Compatible 
• MTBF Minimum 100,000 Hours
• 3-Year Warranty 

Spectral ResponseUV/IR Dual Sensor
Detection Range (at highest Sensitivity Setting for 1ft2 (0.1m2) pan fire)ft (m)

Gasoline 50 (15)
n-Heptane 50 (15)
Diesel Fuel 37 (11)
JP5 37 (11)
Kerosene 37 (11)
Alcohol (Ethanol) 25 (7.5)
IPA (Isopropyl Alcohol) 25 (7.5)
Methanol 25 (7.5)
Methane* 15 (5)
LPG (Propane)* 15 (5)
Hydrogen* 15 (5)
Silane* 15 (5)
Polypropylene Pellets 15 (5)
Office Paper 12 (4)

*20" (0.5m) long 8" (0.2m) width plume fire
Response TimeTypical 5 sec.
Adjustable Time DelayUp to 30 sec.
Sensitivity Ranges1 Sensitivity Range for 1 ft² (0.1m²) gasoline pan fire: 50 ft (15m)
Field of View100° horizontal, 100° vertical
Built-in-Test (BIT)Manual and Automatic BIT
Temperature RangeOperating: -40°F (-40°C) to 160°F (70°C)
Storage: -65°F (-55°C) to 185°F (85°C)
HumidityUp to 95%
  • Thumbnail of document Product data sheet 20 20ml mini uv ir flame detector spectrex en us 584648 14485
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    Product data sheet 20 20ml mini uv ir flame detector spectrex en us 584648 14485

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  • Thumbnail of document Manual spectrex sharpeye 20 20ml user manual spectrex en us 1459818 14486
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    Manual spectrex sharpeye 20 20ml user manual spectrex en us 1459818 14486

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