Fortuna General Mono 50M3 product image

Fortuna General Mono 50M3

The GENERAL MONO 50M3 is a thermal monocular made by Fortuna and is part of the General Mono series.


The General Mono 50M3 packs a quality 50mm f/1.2 lens to capture thermal radiation. The field of view (FOV) on this thermal monocular reads 7.4 x 5.6 degrees. The eye relief distance is 25mm.

Inside the housing of the General Mono 50M3 you'll find the (uncooled, 17µm) 384 by 288px sensor with a refresh rate of 50Hz. The NETD (Noise Equivalent Temperature Difference) of this thermal monocular is <50mK and it's operating between the 7.5µm and 14µm wavelengths.

The dimensions of this thermal monocular are 173 x 100 x 55mm (length/width/height) and weighs in at 700g. This device is rated IP67. It can withstand dust, shocks, water (splashes) and submersion under water. Operating temperatures range between -30°C and 50°C.

The General Mono 50M3 can be used for surveillance missions, law enforcement and search and rescue operations.



  • Built-in 905nm laser rangefinder
  • Electronic compass and biaxial gyroscope
  • Lightweight, sealed body (IP67 rated)
  • Wi-Fi streaming
  • MicroSD video and photo recording


Lens50 mm
Diopter adjustment-5 +5
Eye relief distance25 mm
Optical zoom4.2 x
FOV (h/v)7.4 ° / 5.6 °
Focus range5m to infinity
Thermal typeUncooled
Sensor resolution (h/v)384 pixels / 288 pixels
Pixel pitch17 µm
Sensitivity50 mK
Spectral range7.5 µm / 14 µm
Display resolution (h/v)800 pixels / 600 pixels
Refresh rate50 Hz
Output screen colorFull color
Dimensions (l/w/h)173 mm / 100 mm / 55 mm
Weight700 g
Number of batteries2
Battery life12 hours
Law enforcement
Search & rescue
Fire fighting
Operating temperature-30 °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 529 meters 132 meters 66 meters
Person 1862 meters 465 meters 232 meters
Vehicle 4509 meters 1127 meters 563 meters

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

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