InfiRay Tube TH50 product image

InfiRay Tube TH50

The TUBE TH50 is a thermal weapon sight made by InfiRay and is part of the Tube series.


The Tube TH50 packs a quality 50mm lens to capture thermal radiation. The field of view (FOV) on this thermal weapon sight reads 8.8 x 7 degrees. It's equipped with a 3x digital zoom to capture additional details. The eye relief distance is 50mm.

Inside the housing of the Tube TH50 you'll find the (uncooled, 12µm) 640 by 512px sensor with a refresh rate of 50Hz. The NETD (Noise Equivalent Temperature Difference) of this thermal weapon sight is <40mK.

The dimensions of this thermal weapon sight are 370 x 85 x 75mm (length/width/height) and weighs in at 940g. This device is rated IP67. It can withstand dust, shocks, water (splashes) and submersion under water. Operating temperatures range between -20°C and 50°C.

The Tube TH50 can be used for hunting and law enforcement.



  • Over 10 hours battery life
  • 2560 x 2560 Pixels OLED screen
  • 1000G shock resistance
  • 32 Gb Storage
  • IP67 Rated


Lens50 mm
Eye relief distance50 mm
Optical zoom3 x
Digital zoom3 x
FOV (h/v)8.8 ° / 7.0 °
Thermal typeUncooled
Sensor resolution (h/v)640 pixels / 512 pixels
Pixel pitch12 µm
Sensitivity40 mK
Display resolution (h/v)2560 pixels / 2560 pixels
Refresh rate50 Hz
Image polarityWhite hot, black hot, red hot, color, hot target highlight
Output screen colorFull color
Rail detailsMounts on standard 30 mm scope rings
Dimensions (l/w/h)370 mm / 85 mm / 75 mm
Weight940 g
Number of batteries2
Battery life10 hours
Operating temperature-20 °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 750 meters 187 meters 93 meters
Person 2638 meters 659 meters 329 meters
Vehicle 6388 meters 1597 meters 798 meters

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


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