Awarding Strategies using High-Tec Engineering

FLIR K33 & K53

Thermal Imaging Cameras for Firefighters

Streamlined High Performance Made Even More Economical

FLIR now gives you two new lower-cost, easier-to-use options without sacrificing the reliable clarity and performance that FLIR K-Series TICs are well-known for. The K33 and K53 feature FLIR’s FSX™ Flexible Scene Enhancement that intensifies structural and textural details in thermal images for better perspective and orientation to help improve situational awareness and give firefighters a greater sense of confidence and safety.

Firepower Simplified

The K33 and K53 are the cameras of choice when you’re looking for high image quality without all the bells and whistles. Both power on ready to go so you can focus on the immediate challenges ahead.

  • One glove-friendly on/off button quickly fires up the camera in TI-Basic mode
  • An easy trigger pull freezes an image on the K33 or captures stills and video on the K53
  • Included 2-bay charging station makes it a cinch to stay prepared

Uncompromising Resolution

Higher-res thermal imaging that were once exclusive to FLIR Kx5 models are now available on the new, easy-to-use K33 and K53. Both include real-time FSX Flexible Scene Enhancement that intensifies detail for greater visibility.

  • K33’s 240 × 180 thermal imaging matches the resolution of the K45
  • K53’s 320 × 240 resolution equals the image quality of the K55 and K65
  • Bright 4” LCD shows smooth 60Hz thermal video that keeps up with the action

Affordability Redefined

With the K33 and K53, FLIR now offers the firefighting and rescue community the broadest cost-effective range of high performance TICs – part of our mission to help you stretch your budget and put more of these essential tools into the hands of those who could use them most.

  • The K33 is a high-resolution thermal imaging no-brainer
  • The new K53’s 320 × 240 higher performance is an extraordinary value
  • 2-5-10 Warranty covers the battery for 2 years, parts and labor for 5, and detector for 10



IR Resolution240 x 180 pixels320 × 240 pixels
Thermal Sensitivity/NETD< 40 mK @ 30°C (86°F)< 30 mK @ 30°C (86°F)
Contrast OptimizationDigital image enhancement using FSXTM
Field of View (FOV)51° × 38°
FocusFixed focus
Image Frequency60 Hz
Detector TypeFocal Plane Array (FPA), uncooled microbolometer
Spectral Range7.5–13 µm
Start-up Time< 17 sec. (IR-image, no GUI)
Start-up Time from Sleep Mode< 4 sec.
Image StorageNoUp to 200 JPEGS (co-dependent on the number of video clips)
Video StorageNoUp to 200 files (5 minute max. per clip)
In-Camera Video RecordingNoNon-radiometric MPEG-4 to internal flash memory
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Image Presentation
Display4” LCD, 320 × 240 pixels, backlit
Image ModesTI Basic
Auto-RangeYes, mode dependent
Object Temperature Range–20°C to 150°C (-4°F to 302°F)
0°C to 650°C (32°F to 1202°F)
Accuracy±4°C or ±4% of reading for ambient temperature
10°C to 35°C (50°F to 95°F)
Measurement Analysis
SpotmeterOne spotmeter
IsothermYes, according to NFPA and mode dependent
Automatic Heat DetectionHeat detection mode (hottest 20% of the scene is colorized)
Color PalettesMultiple palettes, mode dependent
Regional AdjustmentsUnits, date, and time formats
Data Communication Interfaces
USBUSB Mini-B: Data transfer to and from PC/ uncompressed colorized video
Power System
BatteryLi Ion, 4 hours operating time
Charging System2-bay charger, truck charger available
Charging Time2 hours to 85% (3 hours and 25 minutes) capacity, charging status indicated by LEDs
Charging Temperature0°C to 45°C (32°F to 113°F)
Environmental Data
Operating Temperature Range–20°C to 85°C (–4°F to 185°F)
150°C (302°F): 15 min.
260°C (500°F): 5 min.
Storage Temperature Range–40°C to 85°C (-40°F to 185°F)
Humidity (Operating and Storage)IEC 60068-2-30/24 h 95% relative humidity
25°C to 40°C (77°F to 104°F) / 2 cycles
Relative Humidity95% relative humidity 25°C to 40°C (77°F to 104°F) non-condensing
DirectivesDesigned to meet NFPA 1801:2013 specification:

  • Vibration
  • Impact acceleration resistance
  • Corrosion
  • Viewing surface abrasion
  • Heat resistance
  • Heat and flame
  • Product label durability
  • EN 61000-6-2:2005 (Immunity)
  • EN 61000-6-3:2011 (Emission)
  • FCC 47 CFR Part 15B (Emission)
Magnetic FieldsEN 61000-4-8, Test level 5 for continuous field (severe industrial environment)
EncapsulationIP 67 (IEC 60529)
Shock25 g (IEC 60068-2-27)
Vibration2 g (IEC 60068-2-6)
Drop2.0 m / 6.6 ft., on concrete floor (IEC 60068-2-31)
Safety (Power Supply)CE/EN/UL/CSA/PSE 60950-1
Physical Data
Camera Weight, Incl. Battery< 1.1 kg / 2.4 lb
Camera Size (L × W × H)120 × 125 × 280 mm / 4.7 x 4.9 x 11 in.
Tripod MountingUNC ¼”-20
Packaging, ContentsInfrared camera, battery (2 ea.), battery charger, hard transport case, power supply, printed documentation, USB cable, lanyard strap, neck strap, retractable lanyard
Optional AccessoriesExtra battery, battery charger, retractable lanyard, strap lanyard, neck strap, USB-cable, tripod adapter, in-truck charger