This iPhone thermal camera accessory is one of my favorite tools, and it's $60 off for Amazon Prime Day
Briefly

The Topdon TC002 thermal imaging camera is a recommended add-on for iPhones, providing high resolution, accuracy, and ease of use for diverse thermal imaging applications, including stills and video capture.
With an ultra-high 256 x 192 resolution, 25Hz refresh rate, and enhanced testing range of -4°F to 1022°F (-20°C to 550°C) with a high level of accuracy, the Topdon TC002 offers exceptional performance and versatility for users.
Read at ZDNET
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