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In my lab I have an NOYAFA NF-521 thermal imager. I also have a UNI-T UTi260B.

Affiliate links

If you want to buy, see here:

Vendor Product
Amazon USA NOYAFA Industrial Thermal Imaging Device NF-521, 24 * 24 Pixels Resolution 16 GB Memory Card Thermal Imaging Camera with 2.4 Inch TFT LCD Display
AliExpress Noyafa NF 521 Handheld Infrared Thermal Imager 340X240 Resolution Imaging 1024 Pixels Sensor Floor Heating Temperature Detector


I keep my documentation for this equipment here:

  • /home/jj5/electronics/equipment/thermal-imager-Noyafa-NF-521/


Thermal Imaging Device NF-521

Noyafa NF-521 Contactless Thermal Imaging Device Industry & Science Infrared Thermometer

  • Temperature testing - The measuring range is -10°C ~ 400°C.Capturing an astonishing level of detail through high thermal sensitivity,isolating the smallest temperature anomalies.
  • Resolution - 32×32 pixel resolution, 33° Field of View.Capture a clear, accurate image focused throughout the field of view.
  • IR thermal imaging camera technics - Use 2 megapixel white lens and 2.4 TFT LCD screen to visualize targets more flexibly.
  • Integrated visual display - Combine infrared and visible images for simpler analysis and edit and optimize images.
  • Certification - Passes RoHS, FCC and CE compliance testing, and Noyafa is certified to the ISO 9001 standard.
  • 100% Affordable - A lot cheaper than Fluke, Milwaukee, Snap-on, and Klein thermal imagers.

System info

Model NF-521
Hardware Ver V3.1
Software Ver V2.1.8


Thermal imaging resolution: 1024 pixels (32*32)

Visible light camera: 2 million pixels

Display Mode: Thermal Imaging, Thermal Hybrid, Digital Camera

Color Palette: Iron Red, Rainbow, Black & White

Wavelength range: 8~14um

Field of View (FOV): 33°horizontal

Instantaneous Field of View (IFOV): 18mrad

Thermal imaging sensitivity: 150mk

Frame rate: ≤9Hz

Save Image Format: Bitmap (BMP) Image

Measuring temperature range: -20°C to 400°C

Basic Accuracy:

-10°C to 400°C accuracy: ±1.8% or ±1.8°C, whichever is greater,

-20 to -0.9℃ Accuracy: ±3℃ test condition,

Emissivity: 0.95 Ambient temperature: 25±2℃

Emissivity: 0.10-0.99 custom adjustment

Measurement resolution: 0.1°℃/F

Response time: 150ms

Wavelength range: 8~14um

Equipment size: 60*120*210mm

Display Type: 2.4"TFTLCD

Display resolution: 320*240 pixels

Battery: 3.7V/2600mAh

Automatic shutdown function: yes

Operating Temperature: -10°C to 45°C, 14°F to 113°F

Package includes

  • 1 x Thermal Imaging Camera
  • 1 x USB Cable
  • 1 x Storage bag
  • 1 x Instruction
  • 1 x memory card

Technical Index

Infrared temperature measurement

Temperature measurement range -10~400℃
Basic accuracy ±2% or ±2.0℃
Emissivity adjustable 0.1~0.99
Measuring resolution 0.1℃
Response time 150ms
Spectral band 8~14um

Thermal imaging technique

Thermal imaging resolution 32*32(1024 pixels)
Electronic shutter No
Visible light camera 2 megapixels
Display resolution Thermal imaging, thermal mixing, digital camera
Color palettes Ironbow, iridescence, Grayscale
Infrared spectral bandwidth 8~14μm
FOV 33° horizontal
IFOV 18 mrad
Thermal imaging sensitivity 150mk
Frame rate ≤9Hz
Image format BMP

General parameters

Monitor 2.4” TFT LCD
Display resolution 320*240 pixels
Battery 3.7V/2600mAh
Automatic shutdown function Yes
Certification CE
SD card 8GB TF card
Working temperature -10℃~45℃
Drop proof 2m
Standard accessories manual, USB cable, 8GB micro TF card