ATN THOR 4 640 4-40X product image

ATN THOR 4 640 4-40X

The THOR 4 640 4-40X is a thermal weapon sight made by ATN and is part of the ThOR 4 series.


The THOR 4 640 4-40X spots a crisp 60mm objective lens collecting thermal radiation. The default field of view on this thermal scope is 8.3 by 6.2 degrees. It has a 10 times digital zoom to enlarge (parts of) the image. The eye relief distance is measured at 90mm.

Behind the lens of the THOR 4 640 4-40X you can find the (uncooled, 17 micrometer) 640 x 480 pixels core refreshing the image at 60Hz.

The physical dimensions of this thermal scope read 375 x 76 x 76mm (lwh) and the scale reads 1060 grams. It handles dust, shocks and water (splashes). It's rated for operating in temperatures between -28°C and 48°C.

The THOR 4 640 4-40X can be used in hunting adventures and police operations.



  • Multiple sensors available
  • Record Video
  • WiFi Dual Stream Video
  • Ballistic Calculator
  • Recoil Activated Video (RAV)
  • One Shot Zero
  • Profile Manager
  • Smart Range Finder
  • Dual Core Processor
  • Share on Social Media
  • Bluetooth
  • Ultra Low Power Consumption
  • Smooth Zoom
  • Electronic Compass


Lens60 mm
Eye relief distance90 mm
Optical zoom4 x
Digital zoom10 x
FOV (h/v)8.3 ° / 6.2 °
Thermal typeUncooled
Sensor resolution (h/v)640 pixels / 480 pixels
Pixel pitch17 µm
Display resolution (h/v)1280 pixels / 960 pixels
Refresh rate60 Hz
Image polarityBlack hot, white hot, color mode
Output screen colorFull color
Startup time3 seconds
Reticle detailsMultiple Patterns
Rail details30mm standard rings
Package contentsEyecup, standard rings, L-shape ring, scope cover, USB-C cable, lens tissue
Dimensions (l/w/h)375 mm / 76 mm / 76 mm
Weight1060 g
Number of batteries1
Battery life18 hours
Operating temperature-28 °C / 48 °C
Law enforcement
Search & rescue
Fire fighting

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 635 meters 158 meters 79 meters
Person 2235 meters 558 meters 279 meters
Vehicle 5411 meters 1352 meters 676 meters

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


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