I added this iPhone thermal camera to my toolkit - My only regret? Not buying it at this price

Adrian Kingsley-Hughes/ZDNET

ZDNET's key takeaways

The Topdon TC002 is available on Amazon for $299. This is an industrial-grade thermal camera at a fraction of the price of a dedicated thermal camera.
Using the camera is a bit fiddly if you have to use the extension cable.

---

The Topdon TC002 thermal camera for iPhone is $70 off, available for $229 with an Amazon Big Spring deal.

---

I have quite a few Android smartphones that have built-in thermal cameras (such as the Blackview BV8900 or the Ulefone Power Armor 18T), and I find them really useful. But my daily driver is an iPhone, and while Apple is never going to add a thermal camera to its flagship smartphone, you can do it yourself. 

Also: I tested the world's first thermal phone camera with a 50Hz refresh rate, and here are the results

One of the best ways to do this is with the Topdon TC002 thermal imaging camera. 

Topdon TC002 tech specs

Ultra-high 256 x 192 resolution 25Hz refresh rateEnhanced testing range of -4°F to 1022°F (-20°C to 550°C) with high level of accuracy 0.1°F/0.1°CMaximum error of ±2°C or 2%Measures 2.8 x 1.65 x 0.55 inches and weighs one ounceComes with case, cleaning cloth, user guide, and 20-inch Lightning extension cable 

In the kit, you get the thermal camera, a case, a cleaning cloth, and a 20-inch Lightning extension cable -- which means you don't have to plug the camera directly into the iPhone, giving you greater flexibility.

Adrian Kingsley-Hughes/ZDNET

Also: This $10 gadget is my favorite repair tool of all time

That Lightning extension cable is a nice touch and particularly useful if your iPhone is in a case that's too thick to accommodate the camera. 

Adrian Kingsley-Hughes/ZDNET

As for the usability of the thermal camera, the TC002 is brilliant at capturing stills and video. Accuracy is such that you can see the thermal echos of fingerprints on a surface.

Adrian Kingsley-Hughes/ZDNET

The software is very smooth and easy to use. What's more, it isn't laggy -- a problem I see with some of the software needed for thermal cameras.

Adrian Kingsley-Hughes/ZDNET

Video capture is also incredible: Look at the detail in this flame (which has been converted from a video file into a GIF file).

Adrian Kingsley-Hughes/ZDNET

Why do you need a thermal imaging camera? I could rattle off dozens of good reasons, but here are a few uses I've found for mine recently:

Find overheating electrical components. (Faulty components usually run hotter.)Diagnose all sorts of HVAC problems, from windows that leak heat to radiators that aren't warming up properly to AC units that aren't cooling.Uncover dangerously overheating rechargeable batteries.Find radiator pipes underneath floorboards.Spot problems with cooling systems on desktop and laptop computers.
Spot binding brakes on cars.

ZDNET's buying advice

The Topdon TC002 is a solid thermal imaging camera. It has a good temperature range, it's very accurate, the image is smooth thanks to the 25Hz refresh rate, and the software isn't laggy or crash-prone.

Also: Are smartphone thermal cameras sensitive enough to uncover PIN codes?

This is an industrial-grade thermal camera. At $229, you can pick it up for a fraction of the cost of dedicated thermal imaging cameras. This is a fantastic addition to any repair toolkit.