Guide IR TS425 product image

Guide IR TS425

The TS425 is a thermal weapon sight made by Guide IR and is part of the TS series.


The TS425 comes with a quality 25mm f/1.1 lens to capture thermal signatures. The FOV on this thermal scope reads 14.9 x 11.2 degrees. The exit pupil diameter is 48mm.

Inside the housing of the TS425 you'll find the (uncooled, 17µm) 400 by 300px thermal imaging sensor with a refresh rate of 50Hz. The NETD (Noise Equivalent Temperature Difference) of this thermal scope is <50mK and it's operating between the 8µm and 14µm wavelengths.

The dimensions of this thermal scope are 230 x 90 x 75mm (length/width/height) and weighs 660g. This device is rated IP67. It can withstand dust, shocks, water (splashes) and submersion under water. Operating temperatures range between -40°C and 50°C.

The TS425 is suitable for hunting and law enforcement.



  • Stadiametric rangefinder
  • 50Hz framerate
  • 4x digital zoom
  • OLED display
  • Center reticle zoom
  • Environmental rating of IP67


Lens25 mm
Exit pupil diameter48 mm
FOV (h/v)14.9 ° / 11.2 °
Thermal typeUncooled
Sensor resolution (h/v)400 pixels / 300 pixels
Pixel pitch17 µm
Sensitivity50 mK
Spectral range8 µm / 14 µm
Display resolution (h/v)1024 pixels / 768 pixels
Refresh rate50 Hz
Image polarityWhite hot, black hot, red hot (3 modes), green hot, blue hot
Output screen colorFull color
Package contentsLens cap, battery, charger, video cable, gun rack, hard case, user manual
Dimensions (l/w/h)230 mm / 90 mm / 75 mm
Weight660 g
Number of batteries1
Battery life5 hours
Operating temperature-40 °C / 50 °C
Environmental ratingIP67
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 264 meters 66 meters 33 meters
Person 931 meters 232 meters 116 meters
Vehicle 2254 meters 563 meters 281 meters

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

More in TS series