TheXinfrared T2S Plus thermal camera.

I've covered quite a few thermal cameras over the years, some standalone units and others that are built into smartphones. For the average user, they offer a performance and sensitivity that's more than adequate.

But sometimes you need something that goes beyond "more than adequate." 

Also: The best cameras for photographers: Entry-level to pro

This is where the Xinfrared T2S Plus comes into play.

The T2S Plus I'm testing is for Android smartphones , but there'sa separate version for iPhone  that features a Lightning connector. 

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Xinfrared T2S Plus

The T2S Plus thermography imager provides high-definition images with full-screen temperature measurements (Max, Min, Center spots), perfect for spotting electrical faults, mechanical breakdowns, water leaks, problems with insulation and HVAC, and much more.

Xinfrared T2S Plus tech specs

• Resolution: 256X192
• Pixel Pitch: 12