Electrooptic STRIX 355 product image

Electrooptic STRIX 355

The STRIX 355 is a thermal monocular made by Electrooptic and is part of the STRIX 3 series.


The STRIX 355 houses a clear 55mm f/1 objective lens collecting thermal radiation. The default field of view on this thermal monocular measures 7.6 by 5 degrees. It has a 4 times digital zoom to enlarge (parts of) the image. The exit pupil diameter measures 30mm.

Behind the lens of the STRIX 355 you can find the (uncooled, 12 micrometer) 384 x 288 pixel microbolometer refreshing the image at 50Hz. The NETD of this thermal monocular is <40mK and it's operating within the 8µm - 14µm infrared wavelengths.

The measurements of this thermal monocular read 173 x 80 x 65mm (l/w/h) and the scale reads 680 grams. This device is rated IPX6. It's protected against dust, shocks and water (splashes). It handles temperatures between -20°C and 50°C.

The STRIX 355 can be utilized in surveillance, hunting trips, law enforcement (police, border patrol etc.) and SAR (Search and Rescue) operations.


  • Picture in Picture (PiP)
  • 5 color palettes
  • Record videos to microSD card
  • Up to 4x smooth digital zoom
  • Advanced image processing
  • Store up to 6 user profiles


Lens55 mm
Diopter adjustment-4 +3
Exit pupil diameter30 mm
Optical zoom5.5 x
Digital zoom4 x
FOV (h/v)7.6 ° / 5.0 °
Focus range10m to infinity
Thermal typeUncooled
Sensor resolution (h/v)384 pixels / 288 pixels
Pixel pitch12 µm
Sensitivity40 mK
Spectral range8 µm / 14 µm
Display resolution (h/v)1024 pixels / 768 pixels
Refresh rate50 Hz
Image polarity5 color palettes
Output screen colorFull color
Package contents18650 battery, MicroSD card, soft cleaning tissue, manual, carrying bag
Dimensions (l/w/h)173 mm / 80 mm / 65 mm
Weight680 g
Number of batteries1
Battery life5 hours
Law enforcement
Search & rescue
Fire fighting
Operating temperature-20 °C / 50 °C
Environmental ratingIPX6

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 825 meters 206 meters 103 meters
Person 2902 meters 725 meters 362 meters
Vehicle 7027 meters 1756 meters 878 meters

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


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