InfiRay P2 Pro: A home inspector’s review of a new smartphone infrared camera

InfiRay recently contacted me to review their new smartphone infrared camera, called the P2 Pro. They sent me a camera for free, and I get a commission if you buy a P2 using this link on Amazon. Also, that link will include a coupon at the checkout page for $50 off. So there, I’ve warned you this isn’t an unbiased review. But I think I’ve done a good job of writing it as though it was.

The Basics

This camera is a direct competitor to the Seek Thermal CompactPRO camera or the FLIR One Pro. It’s a tiny infrared camera that plugs into your phone and retails for $299. They tell me it’s the world’s smallest infrared camera, weighing in at less than 9 grams.

InfiRay P2 Pro in palm

It’s about half the size of the CompactPRO (pictured below), and way smaller than the FLIR One Pro.

P2 Pro vs CompactPRO

It comes in a cute little pouch and includes a USB-C to USB-C cable with one female end and one male end. If you order the camera with a magnetic macro lens, you also get a dust cover for the lens.

P2 Pro kit

Unfortunately, the USB plug on the camera isn’t long enough to fit into a phone if you have a case… at least, it doesn’t work with my case.

Phone case is too big

I had to remove my phone case for the camera to work with my phone.

P2 works without case

I could also use the included USB-C extension cable, but then you definitely need two hands to operate it. However, I think it’s a good idea to use two hands while operating any mobile phone IR camera. If you accidentally drop your phone with the IR camera attached, you’ll probably destroy your charging port.


I initially had some trouble setting up the software. It installed fine on my phone, but then I got an error message saying I needed to turn on the “OTG function” for my phone. I spent a while googling this and trying a bunch of solutions, and nothing seemed to work. I was going to send the company an email asking why it wasn’t working but then tried it again the next day, and it magically worked. I’ve since figured out that launching the software before plugging in the camera will always give me this error message.

The software allows you to select from a variety of color palates, do a live picture-in-picture, show temperature readings for up to three locations, display the temperature scale on the side of the screen, remove the watermark (love this!), record videos, and do a handful of other things similar to other infrared cameras. It’s perfectly adequate.


The P2 Pro has a resolution of 256×192, which is ok, and a thermal sensitivity of <40mK, which is great. As I’ve said in the past, resolution isn’t everything. Thermal sensitivity is just as important, and the lower the number, the better. For comparison, the FLIR ONE Pro is rated at 150mK (not good), and the CompactPro doesn’t publish this data.

Macro Lens

The macro lens is good for close-up images. The two images below show a comparison of a charging cable; without the macro lens, the image is pretty much worthless.

Macro vs no macro lens

While effective, I don’t think there is any use for a macro lens for home inspectors. I’ve never had a situation where I needed a macro lens.


The color palate shows up sideways if you hold the camera to take landscape images. The logo appears sideways too, but the spot temperature automatically rotates. So the camera knows you’re holding it sideways, and it changes some of the screen display, but not all of it. Why?

Sideways view noted

The software is a bit buggy, occasionally displaying a “snowy” screen. Unplugging the camera and plugging it back in usually fixes this.

Screenshot of snowy screen

Also, it doesn’t like to record images of really hot stuff. It has some kind of built-in lens burn protection, preventing infrared images from displaying. I discovered this while writing last week’s blog post about gas fireplaces:

Burn-in protection activated

I had to use my FLIR E6 camera to capture this image for my blog post:

Hot gas fireplace

And finally, the temperature range palate on the side of the images has to be manually turned on every time you restart the software. It would be nice if this could be corrected, so it would remember your last settings.

The good news is that all of these drawbacks could likely be fixed in a single software update; they’re really more knocks against the software than the actual camera.

Image comparisons

I like to compare images to my FLIR E6 camera, which has been the standard infrared camera in my home inspection company for a long time. While the E6 offers image blending, the P2 Pro does not, so I turned off the MSX feature on my E6 to make sure I’m comparing apples to apples. The P2 Pro is on the left, and the FLIR E6 is on the right.

P2 Pro vs E6 01
P2 Pro vs E6 02
P2 Pro vs E6 03
P2 Pro vs E6 04
P2 Pro vs E6 05
P2 Pro vs E6 06
P2 Pro vs E6 07
P2 Pro vs E6 08
P2 Pro vs E6 09
P2 Pro vs E6 10
P2 Pro vs E6 11
P2 Pro vs E6 12


The P2 Pro clearly produces better images and with a wider field of view to boot. For occasional diagnostic use, this is a fantastic little powerhouse of a camera. It won’t replace any of the cameras we use during home inspections because we prefer to use stand-alone cameras, but this would make for a fantastic backup camera.

Written By

Reuben is a second-generation home inspector with a passion for his work. He grew up remodeling homes and learning about carpentry since he was old enough to hold a hammer. Reuben grew up thinking he was going to be a school teacher because he enjoyed teaching others so much. In a sense, that’s a lot of what home inspections are about, so Reuben truly does what he loves. Sharlene has worked with Structure Tech since 2000 and Reuben has been contributing to her blog since 2008.

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