Topdon TC002C or Spark Pro?
Topdon's TC002C Duo and Spark Pro are close relatives: both plug into a USB-C phone and both have a 256×192 thermal sensor running at 25 frames a second. Here's where they differ — and the Topdon model to avoid if you have an iPhone.
Which Topdon is which
- TC002C Duo — USB-C, for USB-C iPhones (iPhone 15 and later), Android and Windows. This is the current model.
- TC002C — the earlier version: USB-C, iPhone and iPad only. Topdon says it doesn't work with Android or Mac.
- TC001 — for Android phones and Windows. Topdon doesn't list it for iPhone.
TC002C Duo vs Spark Pro
| Topdon TC002C Duo | Spark Pro | |
|---|---|---|
| Thermal sensor | 256×192 (shown as 512×384) | 256×192 (shown as 512×384) |
| Refresh rate | 25 Hz | 25 Hz |
| Thermal sensitivity | under 40 mK | 50 mK |
| Temperature range | −20 to 550 °C (−4 to 1022 °F) | −20 to 350 °C (−4 to 662 °F) |
| Accuracy | ±2 °C or ±2 % | — |
| Weight | 30 g | about 21 g |
| Works with | USB-C iPhones, Android, Windows | USB-C iPhones 15 Pro to 17, Android 12 or newer |
| In the box | camera, USB-C extension cable, USB-C to Lightning cable, carrying case, cleaning cloth | camera |
| App | TopInfrared | THG Start |
Where the TC002C Duo is the better choice
- Range. It measures up to 550 °C; Spark Pro stops at 350 °C. That matters for engines, exhausts, kilns and flues, not for walls and outlets.
- Sensitivity. Under 40 mK against 50 mK, so it separates slightly smaller temperature differences.
- What's in the box. The extension cable lets you hold the camera away from the phone — handy with a thick phone case or in a tight spot — and there's a carrying case. Spark Pro comes as the camera alone.
- Windows. It also works with a Windows computer. Spark Pro works with phones only.
Where Spark Pro is the better choice
- Lighter. About 21 g against 30 g, which you notice with the camera hanging off the phone's port.
- No model to get wrong. Topdon sells three similar names with different phone support. There's one Spark Pro, and it works on USB-C iPhones and Android alike.
- 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?
On paper the TC002C Duo has the edge: a wider temperature range, slightly better sensitivity and more in the box. If you work on engines or anything above 350 °C, choose it. For home checks — leaks, drafts, insulation, hot outlets — both cameras see the same detail, and Spark Pro is the lighter one. Only need close checks? Spark (96×96) covers a window frame or a breaker panel. More on fit: thermal cameras for iPhone 15, 16 and 17.
Topdon is a trademark of its owner; we're not affiliated. Topdon specs are from Topdon's own product pages as of October 2026.
