NOYAFA NF-521 Industrial Thermal Imaging Camera

Published on Aug. 2, 2023, 12:14 p.m.

The NOYAFA NF-521 is an affordable thermal imaging camera geared towards DIY and industrial use. It allows users to see variations in temperature, making it useful for finding leaks, electrical issues, and more. In this review, we’ll take a close look at the design, image quality, features, performance, and overall value of this thermal camera.



The NF-521 has a compact handheld design with a 2.4 inch display screen. It features a 32 x 32 pixel thermal sensor and a 2 megapixel visible light camera. The temperature range spans from -10°C to 400°C. Key features include multiple color palettes, edge detection modes, image blending, and the ability to take photos and videos.

Key Features

  • 32x32 pixel thermal sensor resolution
  • Temperature range from -10°C to 400°C
  • Multiple color palettes (ironbow, rainbow, greyscale)
  • Infrared and visible light image blending
  • Edge detection mode
  • 2 megapixel visible light camera
  • 8-14μm spectral range

Design and Handling

The hard plastic body feels a bit delicate and prone to cracking if dropped. The menus and buttons work well, though adjusting temperature ranges requires repetitive button presses which can be tedious. Battery life is adequate, providing a few hours of use per charge. The camera charges via USB and includes a basic carry case.

Image Quality and Performance

For its price point, the NF-521 provides decent image quality and thermal accuracy. The lower resolution sensor does limit fine detail, but it’s sufficient for pinpointing hot or cold spots. Temperature measurements are fairly accurate within 2°C. The image refresh rate is a little slow at 9Hz. Overall, performance is good for most DIY and home inspection tasks, but high-end industrial use may require a more professional grade thermal camera.

Features and Software

A nice selection of features come standard on the NF-521. Multiple color palettes, hot/cold spot tracking, variable emissivity, and image blending allow for versatility. The software runs smoothly with user-friendly menus. It saves JPEGs and BMPs to a micro SD card for transferring images. However, WiFi/app connectivity is not included. This limits live remote viewing options.

Ease of Use

The physical buttons and menu system allow for easy navigation between modes and changing basic settings like palette color and temperature scale. Emissivity is adjustable from 0.10 to 0.99 for measuring different material surfaces accurately. However, more precise adjustments like fine tuning the temperature span require holding the button repeatedly rather than inputting a numeric value directly.


Intended Use Cases

  • Finding heat leaks
  • Locating electrical faults
  • Identifying plumbing issues
  • Automotive diagnoses
  • Home inspection
  • HVAC inspection

User Feedback

The NOYAFA NF-521 receives mixed reviews from customers. Here is a summary of common pros and cons from user reviews:


  • Good value for the price point
  • Compact and lightweight design for portability
  • Intuitive buttons and menu system
  • Different color palettes to choose from
  • Saves JPEGs to MicroSD card for documentation


  • Image quality could be better in some users’ opinions
  • Plastic body feels a bit flimsy and cheap
  • Battery life is too short for all day use
  • Low thermal sensitivity makes small temperature differences hard to discern
  • Manual temperature adjustments are tedious

Many customers were impressed that the NF-521 provides usable thermal imaging at such an affordable price point. They found it handy for locating insulation deficiencies, spotting electrical faults, and similar maintenance or inspection applications. However, some users felt the image resolution was lacking in detail compared to higher-priced models.

A common complaint is that the 4 hour battery life is too limiting for extended field work. Some users resorted to carrying multiple spare batteries to get through a full workday. There were also comments that the all-plastic body feels like it may crack or break if dropped, so durability is a concern.

Overall, most customers seem pleased with the NF-521 as a budget-friendly entry level thermal imager. It meets expectations for basic troubleshooting and inspection capabilities. Areas for improvement would be boosting the image quality, battery life, and ruggedness to better withstand professional daily use. But at this price point, users acknowledge some compromises are inevitable.


With an MSRP around $170, the NF-521 delivers good value for the price. It’s significantly cheaper than higher-end models while still offering core thermal imaging capabilities. Considering the average cost of most professional-grade cameras, this represents an affordable entry point for basic industrial thermal imaging needs.


Overall, the NOYAFA NF-521 offers good value as a starter thermal imaging camera thanks to its fair price point and useful feature set. Image quality and performance are suitable for DIY use, though high-end industrial applications may need a more powerful imager. Those needing connectivity or ruggedness may want to look at higher priced models. But for basic home and automotive diagnostics, the NF-521 gets the job done.



  • 32x32 pixel thermal sensor resolution
  • 2 megapixel visible light camera
  • 2.4 inch LCD display (320x240 pixels)
  • 8-14μm spectrum range
  • Temperature range: -10°C to 400°C
  • 33° field of view
  • 150mK thermal sensitivity
  • 8GB MicroSD card included
  • USB charging

What’s In the Box

  • NF-521 camera
  • 8GB MicroSD card
  • USB charging cable
  • Basic carry case
  • Quick start guide

Usage Tips

  • Play with different color palettes to best isolate targets
  • Use edge detection mode to outline objects
  • Adjust emissivity settings for different surfaces
  • Take both IR and visible light images to correlate data

Frequently Asked Questions

Q: What is the resolution of the NOYAFA NF-521 Industrial Thermal Imaging Device?

A: The NOYAFA NF-521 Industrial Thermal Imaging Device features a thermal imaging resolution of 32 x 32 pixels. While not as high as some professional thermal cameras, it’s suitable for basic detection of hot and cold spots in various applications. For more precise temperature readings or fine detail, consider higher-resolution models.

Q: Can the NOYAFA NF-521 Industrial Thermal Imaging Device be used for detailed electrical inspections?

A: While the NOYAFA NF-521 Industrial Thermal Imaging Device can help identify potential overheating components in electrical systems, its relatively low resolution might make pinpointing specific, small hotspots on circuit boards challenging. For detailed electrical inspections, a thermal imaging camera with a higher resolution would be more suitable.

Q: How does the NOYAFA NF-521 Industrial Thermal Imaging Device compare to similar models?

A: The NOYAFA NF-521 Industrial Thermal Imaging Device stands out as a budget-friendly option for general thermal imaging tasks. It features different thermal imaging modes, temperature measurement, and image storage. Consider researching similar models to compare resolution, temperature range, features, and price point before making a decision.

Q: What’s the temperature measurement range of the NOYAFA NF-521 Industrial Thermal Imaging Device?

A: The NOYAFA NF-521 Industrial Thermal Imaging Device has a temperature measurement range of -10°C to 400°C (-14°F to 752°F), making it versatile for various industrial and home inspection tasks.

Q: Does the NOYAFA NF-521 Industrial Thermal Imaging Device have adjustable emissivity?

A: Yes, the NOYAFA NF-521 Industrial Thermal Imaging Device features adjustable emissivity (0.1 to 0.99), allowing you to compensate for the thermal radiation properties of different materials and obtain more accurate temperature readings.


  • Understand Emissivity: Experiment with the emissivity settings on the NOYAFA NF-521 Industrial Thermal Imaging Device to achieve the most accurate temperature readings on different surfaces.
  • Consider Ambient Temperature: For optimal results, factor in the ambient temperature of the environment when interpreting thermal images.
  • Utilize Color Palettes: Choose the most appropriate color palette on the NOYAFA NF-521 Industrial Thermal Imaging Device for the specific task, as different palettes highlight temperature variations in distinct ways.