ATN OTS LT 320 2-4X product image

ATN OTS LT 320 2-4X

The OTS LT 320 2-4X is a thermal monocular made by ATN and is part of the OTS LT series.


The OTS LT 320 2-4X spots a clear 19mm objective lens collecting thermal radiation. The default field of view on this thermal monocular measures 11.4 by 8.6 degrees. It has a 2 times digital zoom to enlarge (parts of) the image. It has an eye relief distance of 25mm.

Behind the lens of the OTS LT 320 2-4X you can find the (uncooled, 12 micrometer) 320 x 240 pixel microbolometer refreshing the image at 60Hz.

The measurements of this thermal monocular read 195 x 75 x 66mm (l/w/h) and the scale reads 560 grams. It's protected against dust, shocks and water (splashes). It handles temperatures between -28°C and 48°C.

The OTS LT 320 2-4X can be utilized in surveillance, hunting trips, law enforcement (police, border patrol etc.) and SAR (Search and Rescue) operations.



  • Ergonomic Design
  • ATN Obsidian LT core
  • Long Lasting Internal Battery
  • USB Type-C connection


Lens19 mm
Eye relief distance25 mm
Optical zoom2 x
Digital zoom2 x
FOV (h/v)11.4 ° / 8.6 °
Thermal typeUncooled
Sensor resolution (h/v)320 pixels / 240 pixels
Pixel pitch12 µm
Display resolution (h/v)1280 pixels / 960 pixels
Refresh rate60 Hz
Image polarityWhite hot, black hot
Output screen colorFull color
Package contentsSoft carrying case, USB-C Cable, Lens tissue
Dimensions (l/w/h)195 mm / 75 mm / 66 mm
Weight560 g
Number of batteries1
Battery life9 hours
Law enforcement
Search & rescue
Fire fighting
Operating temperature-28 °C / 48 °C

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 285 meters 71 meters 35 meters
Person 1002 meters 250 meters 125 meters
Vehicle 2427 meters 606 meters 303 meters

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

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