Choosing an inspection camera for thermal borescope visual inspection means balancing reach, image clarity, and how much you're willing to spend. Two very different options sit at opposite ends of the price spectrum: the DEPSTECH DS520 triple-lens endoscope and the Ralcam 4-Way Articulating Borescope. The DEPSTECH is a used, seller-refurbished unit with a 16.5-foot cable and a 5-inch IPS screen; the Ralcam is new, with a 6.2mm articulating probe that bends in four directions and locks into place. The right pick depends on whether you need to steer the camera around obstacles or cover a long reach on a budget.
Quick verdict: If your work involves inspecting behind walls, around pipes, or through curved ductwork, the Ralcam's articulating probe makes it the more versatile tool-but you pay a much higher price. If your jobs are mostly straight-line checks and you want to keep costs down, the DEPSTECH's triple-lens design gives you a view forward and to the sides without breaking the bank.
| Feature | DEPSTECH DS520 | Ralcam Articulating |
|---|---|---|
| Price | $52.79 | $178.12 |
| Condition | Used, seller refurbished | New |
| Camera resolution | 1080p | 1080P |
| Probe diameter | 7.9mm / 0.31 inch | 6.2mm |
| Viewing options | Triple lens with front and side cameras | 4-way articulation with angle lock |
| Battery | Up to 4 hours | 2600 mAh |
| Display | 5" IPS screen | LCD display |
| Waterproof | IP67-rated lenses | Waterproof |
Where the DEPSTECH wins:
- Price: the $52.79 price tag leaves a lot of room in the budget.
- Cable length: 16.5ft / 5M lets you reach farther in a straight line.
- Triple-lens setup: switch between front and side cameras without repositioning the probe.
Where the Ralcam wins:
- Articulation: the four-way probe bends and locks at any angle, so you can hold a view while you work.
- Probe size: at 6.2mm, it slips into tighter openings than a 7.9mm cable.
- Adjustable LED lights: six lights can be set to match the scene.
Used DEPSTECH DS520 Endoscope Triple Lens Inspection Industrial Borescope 16.5ft
If you're working on a tight budget, this used seller-refurbished DS520 gives you a lot of inspection value. The triple-lens design lets you switch between one front camera and two side cameras with a single button, which is handy for checking inside wall cavities or looking around pipe joints without moving the probe. The IP67 waterproof lenses each have LED illumination, and the 5" IPS screen makes the 1080p image easy to see from a comfortable angle. The long cable is generous for straight routes through conduit or framing. The main limitation is the probe thickness: at 7.9mm, it's a bit chunkier than a purpose-built articulating camera, and you can't steer the tip around bends. For straight-shot inspections, though, it's a solid, low-cost option.
Ralcam 4-Way 720° Articulating Borescope Industrial Endoscope Inspection Camera
The Ralcam is the more advanced tool of the pair. Its key advantage is the 6.2mm probe that bends and rotates in four directions and locks at any desired angle, so you can direct the view into a valve, behind a bracket, or along a curved pipe without twisting the cable. The 1080P camera delivers sharp images, and the six adjustable LED lights let you brighten dark areas. It also has a 2600 mAh battery and a waterproof design, making it suitable for field work. The practical downside is the higher price compared with the DEPSTECH, plus the articulating mechanism adds complexity that may be overkill for straightforward visual checks. If you frequently chase hard-to-reach inspection points, this capability is worth the extra investment.
Final choice by use case
Choose the DEPSTECH DS520 if your inspection paths are mostly straight, you want a long reach, and saving money matters most. The triple-lens setup and 5" screen make it easy to survey a cavity without moving the probe.
Choose the Ralcam if you need to steer the camera around bends and hold the view in place. The four-way articulating probe and angle lock justify the higher price for complex, hard-to-reach inspections.
