Choosing a borescope for thermal borescope visual inspection usually comes down to one question: do you need a quick look into a tight gap or a full inspection tool for longer, more detailed jobs? These two options take very different approaches.
Quick verdict
If you need a low-cost Android-compatible probe for small, tight jobs, the KERUI 1M Waterproof Endoscope is the simpler pick. If you need a self-contained screen, longer reach, and sharper images, the Used DEPSTECH DS520 is the more capable option. The two sit at opposite ends of the price range, from $4.99 to $52.79, so your budget and inspection style will likely decide.
At a glance
| Product | Price bar | Listed price | What stands out |
|---|---|---|---|
| KERUI 1M Waterproof Endoscope Camera 6LED 3 In 1 USB Industrial Borescope | USD 4.99 | 7mm waterproof probe, 6 LEDs, 640×480 | |
| Used DEPSTECH DS520 Endoscope Triple Lens Inspection Industrial Borescope 16.5ft | USD 52.79 | 1080p, 5-inch IPS screen, three lenses, 16.5ft cable |
Where each product wins
- The KERUI wins on portability and simplicity. Its 7mm head and six LEDs slip into gaps that larger cameras cannot reach, and the 3-in-1 USB design keeps the kit minimal.
- The DEPSTECH wins on image quality and reach. The 1080p sensor, 5-inch IPS screen, and 16.5-foot cable make it feel like a dedicated inspection station rather than a phone accessory.
Product notes
KERUI 1M Waterproof Endoscope Camera 6LED 3 In 1 USB Industrial Borescope
The probe itself is the easiest selling point: a 7mm diameter camera head with six adjustable LEDs and an IP67 waterproof rating, ready for dark, damp, and awkward spaces. The 1-meter cable is short, but that is part of its appeal for quick checks on a bench, under a sink, or inside a small component. It connects through a USB/Android interface, so you will need an OTG cable for most phones. The trade-off is resolution: the 640×480 sensor is fine for seeing whether something is blocked, corroded, or loose, but it will not produce the crisp stills you get from a 1080p camera. If your goal is a low-stakes, portable visual inspection tool, this fills that role without adding bulk.
Used DEPSTECH DS520 Endoscope Triple Lens Inspection Industrial Borescope 16.5ft
The DS520 is a different class of inspection tool. Its triple-lens setup puts one front camera and two side cameras behind a single button, and split-screen mode lets you compare views without repositioning the probe. The 16.5-foot detachable cable reaches deep into wall chases, ductwork, or vehicle cavities, while the 5-inch IPS screen keeps the image in front of you instead of on a phone. The 1080p resolution gives you enough detail to read markings or inspect a gasket closely. The limitation is condition: this listing is a seller-refurbished unit, so you are buying a used tool with the usual caveats. You are paying for a complete package-display, cable, and imaging-rather than a bare probe.
Final choice by use case
- For quick, close-range checks in tight spots, choose the KERUI 1M Waterproof Endoscope Camera 6LED 3 In 1 USB Industrial Borescope. Its 7mm head and six LEDs are made for narrow gaps.
- For deeper inspections and more detail, choose the Used DEPSTECH DS520 Endoscope Triple Lens Inspection Industrial Borescope 16.5ft. The 16.5ft cable, 1080p sensor, and built-in screen give you the reach and resolution that a small USB probe cannot match.
