InfiRay Zoom ZH38 product image

InfiRay Zoom ZH38

The ZOOM ZH38 is a thermal monocular made by InfiRay.


The Zoom ZH38 contains a crisp 19mm objective lens focusing the available thermal radiation. The field of view on this thermal monocular is 16 by 9 degrees. It features a 4 times digital zoom to enlarge your subject. The eye relief distance is measured at 20mm and the exit pupil diameter measures 5mm.

Behind the lens of the Zoom ZH38 you can find the (uncooled, 12 micrometer) 640 x 512 pixels core refreshing the image at 50Hz. The thermal contrast (NETD) of this thermal monocular is <25mK.

The physical dimensions of this thermal monocular read 190 x 65 x 60mm (lwh) weighing in at 580 grams. This device is rated IP67. It handles dust, shocks and water (splashes). It's rated for operating in temperatures between -20°C and 50°C.

The Zoom ZH38 can be used in scanning and surveillance, hunting adventures, police operations and search and rescue.



  • Variable optical zoom (19mm to 38mm)
  • 1440×1080 pixels HD Display
  • Shutterless thermal core
  • Up to 10 hours battery life
  • 32GB Storage for video and images
  • Picture in Picture (PiP)
  • 5 Color Palettes


Lens19 mm
Eye relief distance20 mm
Exit pupil diameter5 mm
Optical zoom1.6 x
Digital zoom4 x
FOV (h/v)16 ° / 9 °
Thermal typeUncooled
Sensor resolution (h/v)640 pixels / 512 pixels
Pixel pitch12 µm
Sensitivity25 mK
Display resolution (h/v)1440 pixels / 1080 pixels
Refresh rate50 Hz
Image polarityWhite hot, Black hot, red hot, color, hot target
Output screen colorFull color
Dimensions (l/w/h)190 mm / 65 mm / 60 mm
Weight580 g
TypeLi-on battery pack
Number of batteries1
Battery life10 hours
Law enforcement
Search & rescue
Fire fighting
Operating temperature-20 °C / 50 °C
Environmental ratingIP67

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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InfiRay Zoom
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