​FLIR Systems, Inc. designs, develops, manufactures, markets, and distributes technologies that enhance perception and awareness. 

FLIR bring innovative sensing solutions into daily life through their thermal imaging systems, visible-light imaging systems, locator systems, measurement and diagnostic systems, and advanced threat detection systems. 

Today FLIR advanced systems and components are used for a wide variety of thermal imaging, situational awareness, and security applications, including airborne and ground-based surveillance, condition monitoring, navigation, recreation, research and development, manufacturing process control, search and rescue, drug interdiction, transportation safety and efficiency, border and maritime patrol, environmental monitoring, and chemical, biological, radiological, nuclear, and explosives threat detection.

About FLIR


The FLIR T840 infrared camera is designed to help electric utility and other thermography professionals comfortably survey equipment both indoors or outdoors and seek out signs of failure all day long.

Thanks to an integrated eyepiece viewfinder and a bright 4-inch color LCD display, the T840 makes it easy to conduct inspections outside in bright, challenging light conditions. The 180° rotating lens platform and thoughtful ergonomic design helps users quickly diagnose failing components in hard-to-reach areas. A 6° telephoto lens option is available to ensure accurate temperature measurement of small targets from farther distances.

Fast, flexible, accurate – in any work environment

Safely and comfortably assess equipment and prevent component failure from any vantage point, in any lighting condition

  • Scan outdoor equipment from a safe distance using the integrated eyepiece viewfinder
  • Reduce the strain of full-day inspections with the 180° rotating optical block
  • Share lenses across your fleet of cameras thanks to AutoCalTM optics
  • Ensure crisp thermal imagery and spot-on temperature readings every time with laser assisted autofocus


Advanced imaging technology and superior sensitivity help you make the right call – fast

  • Get industry-leading image clarity from FLIR Vision ProcessingTM, MSX®, UltraMax®, and proprietary adaptive filtering
  • Determine accessibility of components for repair at the touch of a button by activating on-screen laser distance measurement
  • See problems and make decisions easily thanks to a scratch-resistant, 4-inch LCD display that’s 33% brighter and 4x the resolution of comparable cameras


Get the most out of your work day with rapid reporting features that help you organize findings in the field

  • Quickly access menus, folders, and settings using intuitive controls, including rapid response touchscreen
  • Allow customers to observe critical findings in real time through Wi-Fi streaming to the FLIR Tools® app
  • Prepare precise documentation with embedded GPS locations, as well as measurement data from METERLiNK®-enabled FLIR clamps and multimeters



IR Resolution    464 x 348 (161,472 pixels)
Laser Pointer Yes
Programmable Buttons 2
Spectral Range 7.5 - 14.0 µm
Macro Mode 24° lens option 71 µm effective spotsize
Text Predefined list or touchscreen keyboard
Time Lapse 10 sec to 24 hrs
Voice 60 sec. recording added to still images or video via built-in mic (has speaker) or via Bluetooth
Weight & Dimensions (without lens) 1.3 kg (2.9 lbs), 140 x 201 x 84 mm (5.5 x 7.9 x 3.3 in)

Connections & Communications

Communication Interfaces USB 2.0, Bluetooth, Wi-Fi
Storage Media Removable SD card
Video Out DisplayPort over USB Type-C


Operating Temperature Range -15°C to 50°C (5°F to 122°F)
Storage Temperature Range -40°C to 70°C (-40°F to 158°F)
Shock & Vibration & Encapsulation 25 g / IEC 60068-2-27, 2 g / IEC 60068-2-6 / IP 54; EN/UL/CSA/PSE 60950-1

Imaging & Optical

Color palettes Iron, Gray, Rainbow, Arctic, Lava, Rainbow HC
Detector Type and Pitch Uncooled microbolometer, 17 µm
Digital Camera 5 MP, with built-in LED photo/video lamp
Digital Zoom 1-6x continuous
f-number f/1.1 (42° lens), f/1.3 (24° lens), f/1.5 (14° lens), f/1.35 (6° lens)
Focus Continuous with laser distance meter (LDM), one-shot LDM, one-shot contrast, manual
Global Positioning System [GPS] Automatic image tagging
Image Frequency 30 Hz
Image Sketch
From touchscreen, on infrared image only
Lens Identification Automatic
Minimum Focus Distance 42° lens - 0.15 m; 24° lens - 0.15 m, optional macro mode; 14° lens - 1.0 m; 6° lens - 5.0 m
Non-Radiometric IR or Visual Video H.264 to memory card
Non-radiometric IR video streaming H.264 or MPEG-4 over Wi-Fi MJPEG over UVC or Wi-Fi
Picture-in-Picture Resizable and movable
Radiometric IR video recording Real-time radiometric recording (.csq)
Radiometric IR video streaming Yes, over UVC or Wi-Fi
Viewfinder Yes
UltraMax Quadruples pixel count; activated in menu and processed in FLIR Tools
UltraMax Resolution 645,888 effective pixels

 Measurement & Analysis

Accuracy ±2°C (±3.6°F) or ±2% of reading
Area measurement information Yes; calculates area inside measurement box in m² or ft²
Laser Distance Meter Yes; dedicated button
Measurement Presets No measurement, center spot, hot spot, cold spot, User Preset 1, User Preset 2
Object Temperature Range -20°C to 120°C (-4°F to 248°F); 0°C to 650°C (32°F to 1202°F); 300°C to 1500°C (572°F to 2732°F)
Spot Meter 3 ea. in live mode
Thermal Sensitivity/NETD <30 mK at 30°C (42° lens)

Meter Data

Display 4", 640 x 480 pixel touchscreen LCD with auto-rotation


Battery operating time Approx. 4 hours at 25°C (77°F) ambient temperature and typical use
Battery Type Li-ion battery, charged in camera or on separate charger

Shipping Information

Packaging Infrared camera with lens, small viewfinder eyecup, 2 batteries, battery charger, hard transport case, lanyards, front lens cap, power supplies, printed documentation, SD card (8 GB), cables (USB 2.0 A to USB Type-C, USB Type-C to HDMI, USB Type-C to USB Type-C)

Storage Media

Image File Format Standard JPEG with measurement data included
Image Storage Mode Infrared, visual, MSX®, Picture-in-Picture


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