InfiRay Eye III E3 Max product image

InfiRay Eye III E3 Max

The EYE III E3 MAX is a thermal monocular made by InfiRay and is part of the Eye III series.


The Eye III E3 Max comes with a quality 35mm lens to capture thermal signatures. The FOV on this thermal monocular reads 7.5 x 5.7 degrees. It comes with a 4x digital zoom to get additional details.

Inside the housing of the Eye III E3 Max you'll find the (uncooled, 12µm) 384 by 288px thermal imaging sensor with a refresh rate of 50Hz. The NETD (Noise Equivalent Temperature Difference) of this thermal monocular is <25mK.

The dimensions of this thermal monocular are 180 x 54 x 54mm (length/width/height) and weighs 480g. This device is rated IP67. It can withstand dust, shocks, water (splashes) and submersion under water. Operating temperatures range between -20°C and 50°C.

The Eye III E3 Max is suitable for surveillance missions, hunting and law enforcement.



  • Ergonomic Design and Lightweight
  • Improved Image Processing Algorithm
  • Starts/shuts down by opening/closing lens-cap
  • Scrollwheel Menu Navigation
  • Magnetic Charger
  • Record Videos to Build-In Storage
  • Digital Compass
  • WiFi Streaming


Lens35 mm
Diopter adjustment-5 +5
Optical zoom5 x
Digital zoom4 x
FOV (h/v)7.5 ° / 5.7 °
Thermal typeUncooled
Sensor resolution (h/v)384 pixels / 288 pixels
Pixel pitch12 µm
Sensitivity25 mK
Display resolution (h/v)1440 pixels / 1080 pixels
Refresh rate50 Hz
Image polarityWhite hot, black hot, red hot, rainbow
Output screen colorFull color
Dimensions (l/w/h)180 mm / 54 mm / 54 mm
Weight480 g
TypeLi-ion 3.6V
Number of batteries1
Battery life8 hours
Law enforcement
Search & rescue
Fire fighting
Operating temperature-20 °C / 50 °C
Environmental ratingIP67

DRI Ranges

DRI stands for Detection, Recognition and Identification and is based on the widely used Johnson's criteria.

  • Detection Detect if an object is present
  • Recognition See what type of object it is (i.e. person, vehicle, airplane)
  • Identification For example see if someone is a friend or foe
Detection Recognition Identification
Rabbit 525 meters 131 meters 65 meters
Person 1847 meters 461 meters 230 meters
Vehicle 4472 meters 1118 meters 559 meters

Please note that these values are calculated, always consult the manufacturer for official range numbers.


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