ATN OTS LT 320 4-8X product image

ATN OTS LT 320 4-8X

The OTS LT 320 4-8X is a thermal monocular made by ATN and is part of the OTS LT series.


The OTS LT 320 4-8X spots a crisp 35mm objective lens collecting thermal radiation. The default field of view on this thermal monocular is 6.3 by 4.7 degrees. It has a 2 times digital zoom to enlarge (parts of) the image. The eye relief distance is measured at 25mm.

Behind the lens of the OTS LT 320 4-8X you can find the (uncooled, 12 micrometer) 320 x 240 pixels core refreshing the image at 60Hz.

The physical dimensions of this thermal monocular read 195 x 75 x 66mm (lwh) and the scale reads 560 grams. It handles dust, shocks and water (splashes). It's rated for operating in temperatures between -28°C and 48°C.

The OTS LT 320 4-8X can be used in scanning and surveillance, hunting adventures, police operations and search and rescue.



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


Lens35 mm
Eye relief distance25 mm
Optical zoom4 x
Digital zoom2 x
FOV (h/v)6.3 ° / 4.7 °
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 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.

More in OTS LT series