Guide IR TA631 product image

Guide IR TA631

The TA631 is a thermal clip-on made by Guide IR and is part of the TA Gen 2 series.


The TA631 packs a quality 35mm f/1 lens to capture thermal radiation. The field of view (FOV) on this thermal clip-on reads 12.5 x 9.4 degrees. It's equipped with a 8x digital zoom to capture additional details. The eye relief distance is 20mm and the exit pupil diameter is 20mm.

Inside the housing of the TA631 you'll find the (uncooled, 12µm) 640 by 480px sensor with a refresh rate of 50Hz. The NETD (Noise Equivalent Temperature Difference) of this thermal clip-on is <40mK and it's operating between the 8µm and 14µm wavelengths.

The dimensions of this thermal clip-on are 161 x 60 x 79mm (length/width/height) and weighs in at 550g. This device is rated IP67. It can withstand dust, shocks and water (splashes). Operating temperatures range between -30°C and 50°C.

The TA631 can be used for surveillance missions, hunting and law enforcement.



  • Extended Battery Life
  • Easy Installation, No Re-zeroing Required
  • PureIR Image Algorithm
  • Six color palettes
  • Rugged and Durable (IP67 Rated)
  • Wireless remote control


Lens35 mm
Eye relief distance20 mm
Exit pupil diameter20 mm
Optical zoom1 x
Digital zoom8 x
FOV (h/v)12.5 ° / 9.4 °
Thermal typeUncooled
Sensor resolution (h/v)640 pixels / 480 pixels
Pixel pitch12 µm
Sensitivity40 mK
Spectral range8 µm / 14 µm
Display resolution (h/v)800 pixels / 600 pixels
Refresh rate50 Hz
Image polarityWhite Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot
Output screen colorFull color
Video formatsLEMO Interface
Startup time10 seconds
Package contentsExternal eyepiece, Adapter ring, Picatinny rail, Bluetooth remote control, 7-pin LEMO to USB and AV cable
Dimensions (l/w/h)161 mm / 60 mm / 79 mm
Weight550 g
Number of batteries1
Battery life7 hours
Operating temperature-30 °C / 50 °C
Storage temperature-45 °C / 70 °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 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 TA Gen 2 series