When you need to see inside a wall, a pipe, or a heat-producing electrical panel, the first fork is whether you need temperature data or just a clear visual. These four inspection tools cover both sides: a $4.99 KERUI endoscope for a quick look, two Thermal Master P1 thermal camera listings in the $120 range, and a $269 P3 thermal model for fine detail. This guide matches each one to the job it fits.
Quick Take
For a visual-only peek into a narrow gap, the 1-meter KERUI endoscope is the low-cost route. If you want to spot overheated breakers or cold air leaks from your phone, the Thermal Master P1 gives you a smartphone thermal imager with temperature readings up to 600°C. When you need fine thermal detail in small components, the P3 steps up in resolution with a lens designed for closer inspection.
Listed Price Comparison
Listed prices in this group run from $4.99 to $269. The bar below is a visual guide to each listed price.
| Product | Listed Price | Price Bar | Best fit |
|---|---|---|---|
| IOS&Android P1 Thermal Camera 320*240 USB-C Infrared Thermal Imager 600℃ Repair | USD 119.93 | Smartphone thermal scanning | |
| Thermal Master P1 Thermal Camera 320x240 Super IR USB-C iOS Android PC Leak HVAC | USD 129.00 | Thermal scanning with PC option | |
| P3 Thermal Camera for iPhone&Android Phone 512*384 X³Resolution 600℃ Macro Lens | USD 269.00 | High-resolution thermal detail | |
| 1M Waterproof Endoscope Camera 6LED 3 In 1 USB Industrial Borescope | USD 4.99 | Visual-only narrow inspections |
Decision Matrix
| If your priority is... | Choose... | Why it fits |
|---|---|---|
| A low-cost visual look inside tight spaces | 1M Waterproof Endoscope Camera 6LED 3 In 1 USB Industrial Borescope | 7mm flexible probe, 6 LEDs, IP67 waterproofing, Android/OTG setup |
| Broad thermal sweeps from a smartphone | IOS&Android P1 Thermal Camera 320*240 USB-C Infrared Thermal Imager 600℃ Repair | 25Hz frame rate, ±2°C accuracy, adjustable macro lens |
| Thermal work that also connects to a PC | Thermal Master P1 Thermal Camera 320x240 Super IR USB-C iOS Android PC Leak HVAC | iOS/Android/PC compatibility, 52° × 39° field of view |
| Fine macro thermal detail | P3 Thermal Camera for iPhone&Android Phone 512*384 X³Resolution 600℃ Macro Lens | High-resolution X³ output, manual-focus lens |
Product Notes
IOS&Android P1 Thermal Camera 320*240 USB-C Infrared Thermal Imager 600℃ Repair
This is the lower-priced Thermal Master P1 entry in the group. It is a smartphone thermal imager built for iOS and Android devices with USB-C, and it uses the Thermal Master/Temp Master app for live views. The listed features include a 25Hz refresh rate, 15X digital zoom, and an adjustable macro lens, with a temperature span from -20°C to 600°C and accuracy of ±2°C. Choose it when you want a thermal scanning tool rather than a cable probe. The main limitation is scope: if the task is simply to see inside a pipe, the KERUI endoscope is a much less expensive visual-only option.
Thermal Master P1 Thermal Camera 320x240 Super IR USB-C iOS Android PC Leak HVAC
This second P1 listing adds PC compatibility to the picture. It connects to iOS devices, Android phones, and PCs, and the description highlights a case-friendly 2mm extended plug plus 0.32W power draw. The listed field of view is 52° × 39°, and the temperature range extends from -20°C to 600°C. It is a thermal imaging camera, not a flexible borescope, so you won't snake it into tight spaces. Use it when the workflow includes a laptop or desktop computer as well as a phone, or when the wider field of view helps you scan walls, panels, and HVAC lines faster.
P3 Thermal Camera for iPhone&Android Phone 512*384 X³Resolution 600℃ Macro Lens
The P3 is the highest-resolution thermal option here. It takes a native 256×192 thermal sensor and, through RazorX + X³ imaging, outputs 512×384 thermal images. The manual-focus 8mm lens produces a 40° × 30° field of view, and the 15X digital zoom helps you inspect smaller targets from a distance. It also lists Windows compatibility as part of the device support. Choose it when fine detail matters more than price. The limitation is the opposite end of the spectrum: if you only need a visual check, this level of thermal detail is more capability than the job requires.
1M Waterproof Endoscope Camera 6LED 3 In 1 USB Industrial Borescope
This KERUI endoscope is the lowest-priced product in the group and the only one with a flexible cable. The 7mm probe carries six LEDs, and the listing describes an IP67 waterproof design with 640×480 camera resolution. It is a visual-only inspection tool, not a thermal imager, so you will not get temperature readings. The description points to Android devices and says an OTG cable is needed. Pick it when you want a simple, inexpensive way to look inside a wall, duct, or small opening, and when thermal data is not part of the job.
Final Recommendation by Use Case
If you need to see inside a narrow opening and nothing else, the KERUI 1M Waterproof Endoscope Camera is the direct match. If you want a general-purpose thermal scanner for home, repair, or HVAC checks, the lower-priced Thermal Master P1 listing is the direct smartphone match. If you plan to do thermal work from a PC as well as a phone, the Thermal Master P1 Super IR listing adds that compatibility. For the finest detail in electronics, macro, or building diagnostics, the P3 thermal camera is the one to carry.
