InfiRay P2 Pro or Spark Pro?
The InfiRay P2 Pro (also sold under the Thermal Master name) and Spark Pro use the same class of sensor: 256×192 thermal pixels at 25 frames a second. So the choice comes down to size, temperature range, accessories — and how each one plugs into your phone.
Side by side
| InfiRay P2 Pro | Spark Pro | |
|---|---|---|
| Thermal sensor | 256×192 | 256×192 (shown as 512×384) |
| Refresh rate | 25 Hz | 25 Hz |
| Field of view | 56° × 42° | 50° × 37.5° |
| Temperature range | −20 to 550 °C (−4 to 1022 °F) | −20 to 350 °C (−4 to 662 °F) |
| Weight | 9 g | about 21 g |
| Macro lens | magnetic clip-on, in some bundles | — |
| USB-C iPhone | iOS version with a Lightning plug and a Lightning-to-USB-C adapter | plugs straight into USB-C |
| Android | separate USB-C version | same camera |
| App | Temp Master | THG Start |
Some listings give the P2 Pro's top temperature as 600 °C; InfiRay's own data sheet says 550 °C.
Where the P2 Pro is the better choice
- Size. It weighs 9 g and measures 27 × 18 × 9.8 mm. Spark Pro weighs about 21 g.
- Macro lens. The clip-on macro lens lets it focus on a circuit board and pick out a single hot component. If you repair electronics, this is the reason to choose it. Spark Pro has no macro option.
- Higher temperatures. Up to 550 °C, against 350 °C for Spark Pro.
- Slightly wider view — 56° across instead of 50°.
- A case in the box. Retailers list a small carry case with every version. Spark Pro comes as the camera alone.
Where Spark Pro is the better choice
- It plugs straight into a USB-C iPhone. The P2 Pro for iPhone has a Lightning plug and reaches a USB-C port through an adapter. Reviewers found that generic adapters often don't work, so you rely on the one that comes with it — and the Android USB-C version doesn't work with an iPhone at all. Spark Pro is one camera with a USB-C plug for iPhone 15 Pro to 17 and Android 12 or newer.
- Switching phones. Because it's the same camera for iPhone and Android, you can move it between a family member's Android and your iPhone.
- Buying it. From us: free tracked shipping (usually 7–19 business days), 30-day returns, and a full refund including return shipping if it doesn't work with a phone we list as compatible.
So which one?
For electronics — boards, chargers, small components up close — the P2 Pro with its macro lens is the better tool. For home checks on a USB-C phone — leaks, drafts, insulation, hot outlets — the two see the same detail, and Spark Pro is the simpler one to plug in and use. For close checks only, Spark (96×96) is also an option. More on what fits which iPhone: thermal cameras for iPhone 15, 16 and 17.
InfiRay and Thermal Master are trademarks of their owners; we're not affiliated. P2 Pro specs are from InfiRay's data sheet and authorized retailers as of October 2026.
