Designed to mount on any MIL-STD-1913 rail interface forward of an existing scope, the FLIR ThermoSight® T75 offers mission flexibility as a long-range thermal weapon sight and as a hand-held observation device. It’s designed to interface with a wide range of day scopes and weapon platforms. The T75 runs on common AA Li batteries and is equipped with large, rugged controls for image adjustment. The long-wave IR sensor provides crisp imagery all night and all day.


  • Soft Case
  • Operator’s Manual
  • Quick Reference Card
  • Battery Cartridge
  • AA Li Batteries
  • Lens Cloth
  • Light Shroud/Eye Relief
  • Remote Control Pad
  • Video Output Cable


Multi-Use Design

  • Use in front of a day optics as a clip-on, rail-mounteed thermal weapon sight. It's compatible with all combat optics and is rapidly adaptable to most weapons.

Long-Wave Thermal Imaging Sensor

  • Crisp IR imagery lets you see in total darkness, through fog, smoke, and dust, and reveals more during daylight hours.

Ergonomic Configuration and Control

  • Low profile reduces snag hazards, interfaces allow positive control of aimpoint while adjusting sight, and joystick maintains shooter cheek weld.

Compact, Light, and Rugged

  • Highly portable design reduces operator fatigue and large, rugged controls for basic image adjustments means no complex menus to navigate.

Boresight Maintained After Weapon Discharge

  • The proprietary FLIR Shock Mitigation System™ (SMS™) absorbs and dissipates high shock loads while maintaining zero.


Dimensions 7.3” L x 2.8” W x 3.5” H (185.42mm L x 71.12mm W x 88.9mm H)
Weight (with batteries and hardware) 1.75 lbs (0.79k)
Sensor Type 640 x 512 17μ VOx Microbolometer
Field of View (Sensor) 9.4°∆(H) x 7.5˚ (V)
Spectral Band (Display) 9.4°∆(H) x 7.5˚ (V)
Magnification 1x, 2x and 4x
Spectral Band 7.5-13.5 μm
Silent Operation Inaudible Beyond 1m
Video RS-170 External Video Out (NTSC or PAL) (installed in any orientation)
Power Source 2 or 3AA (lithium or alkaline) OR 1 or 2 DL 123 batteries (installed in any orientation)
Battery Life Approximately 6 hours continuous use with 3AA lithium
IP Rating IP 68 (20 ft. freshwater, 6 hr; 66 ft seawater, 2 hrs)
Operating Temperature -40°∆C to +49°∆C (-40°∆F to +120°∆F)
Storage Temperature -40°∆C to +71°∆C (-40°∆F to +160°∆F)
Command and Control Joystick Palette, Polarity, Zoom, Digital Detail Enhancement Brightness/Contrast Windage/Elevation, and Menu
Menu Calibration, Display, Mode (Clip-on), Weapon, External Video, and Laser (On/Off)
Shock and Vibe Per MIL-STD-810F

FLIR Thermosight T75 Clip-On Thermal Sight

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