Choosing a borescope for thermal borescope visual inspection usually comes down to balancing reach, image quality, and budget. Do you need a thermal sensor, or would a bright, flexible visual camera be enough? The DEPSTECH DS520 enters that decision as a USD 52.79 option that leans heavily on convenience features rather than thermal measurement.
Quick verdict
For anyone who needs a close look inside tight spaces without spending heavily, the DS520 offers a triple-lens design, a 5-inch IPS screen, IP67 waterproof cameras, and a 16.5-foot cable. It will not give you thermal data, so keep it for visual-only checks.
What stands out from the listed details
The DS520's headline feature is its three-camera setup: one front camera and two side cameras that you can switch between with a single button. That makes it easier to inspect around corners or inside pipes without constantly re-angling the cable. Each lens carries IP67 waterproofing and has LED illumination, so the listed specs point to a tool that can handle damp, dark environments.
The 5-inch IPS screen gives you a reasonably large view for a portable borescope, and the camera resolution is listed at 1080p. The probe diameter is 7.9mm (0.31 inch), which means it can sneak into many small openings. The 16.5-foot cable provides solid reach for wall cavities, engine bays, and plumbing runs.
Another practical touch is the detachable cable. That, along with the included EVA case, makes the whole kit easier to store and carry. The rechargeable battery is rated to last up to 4 hours on a full charge, so you likely won't need to recharge mid-job on shorter inspections.
Who it suits
This borescope could be a good match for DIYers, homeowners, or tradespeople who regularly need a visual look inside walls, ducts, drains, or equipment. The triple-lens switching and IP67 rating make it especially useful for plumbing or HVAC checks where water and confined spaces are common. If you only need visual confirmation and not thermal measurements, the DS520 covers that without stretching your budget.
Meaningful trade-offs
The biggest limitation is the lack of thermal imaging. If your thermal borescope visual inspection job requires temperature readings, this unit will not do that. It is purely a visual inspection tool.
The listing also describes the unit as used and seller refurbished. That means you are getting a pre-owned item, so physical condition could vary. Still, the refurbished designation suggests it has been checked over by the seller, though no warranty or return details are listed here.
Another trade-off is the 4-hour battery life. That is fine for occasional inspections, but for continuous all-day work you may need to recharge or keep a power source nearby.
Bottom line
The DEPSTECH DS520 is a feature-packed visual borescope at a modest price. The triple-lens flexibility, IP67 waterproofing, 5-inch screen, and long cable give you a lot of utility for USD 52.79. Just remember that it is a visual-only tool and a refurbished unit, so set your expectations accordingly.
Used DEPSTECH DS520 Endoscope Triple Lens Inspection Industrial Borescope 16.5ft
The DEPSTECH DS520 is a strong choice if you want a multi-angle camera in one tool. The one-button switch among front and side cameras helps you check a pipe joint or a wall cavity without pulling the cable out and repositioning. The IP67 waterproof rating and LED lights make it suitable for damp, dark spaces, and the detachable cable keeps storage convenient. The main drawback is that it does not capture thermal images, so if your inspection depends on temperature data, you'll need a different tool. At USD 52.79, it's a practical pick for visual-only borescope work.
