As an Amazon Associate, Akermin earns from qualifying purchases. Product links on this page are affiliate links.
Ralcam · Ralcam M5 Series 4-Way Articulating Borescope, Replaceable Snake Tube | Stainless Steel Joystick, 0.24 inch Camera, 5" HD IPS Display, 5FT Auto & Pipe, 32GB, IP67 Waterproof
View on AmazonPrice and availability are shown on Amazon and can change at any time.
A four way articulating borescope steered by a stainless steel joystick, with a 6.2 mm IP67 probe carrying six plus one LEDs at three brightness levels, a 5 inch display, 32 GB card support for photos and video, a detachable 5000 mAh battery rated for up to five hours, a high temperature warning at 90 C or above, 180 degree image flip and 4X digital zoom. The interesting part is the second bullet. The snake cable is designed to be replaced, including with different sizes, which is unusual and genuinely valuable. The listing never publishes which sizes exist or which one is in the box, so the feature cannot be planned around yet.
The replaceable cable is the feature, and the size list is missing
On almost every borescope the probe is permanently attached to the handset, and the probe is the part that dies. It gets crushed under a bonnet, kinked round a corner it was never going to turn, pulled against a thread, or filled with water at the tip where a seal has aged. When that happens, the screen, the battery, the joystick, the card slot and the firmware all go in the bin alongside it.
A modular cable changes that arithmetic entirely. The handset becomes the durable asset and the probe becomes a consumable, which is how the equivalent professional instruments have always been built. The second bullet makes exactly that point about extending the working life of the device, and for once the sentence is a description of the design rather than marketing language.
It also changes what one instrument can cover. Fitting a different diameter or a different length means the handset handles jobs that would otherwise need two separate tools, and avoids owning both. Borescopes with replaceable inspection probes is a small group for precisely this reason.
And then the listing stops. There is no list of available cable diameters, no list of available lengths, no part numbering, no statement of which cable ships in the box, and no length given for the probe described in the third bullet. The 6.2 mm figure does appear, so that is presumably what arrives, but how long it is goes unmentioned.
That gap is significant, because the value of a modular system is the catalogue behind it. A replaceable cable with one cable available is a repair path. A replaceable cable with four diameters and three lengths available is a system. The bullets do not say which of those is being sold, and the probe length they omit constrains access just as firmly as the diameter they publish.
Four ways beats two ways, and no bend angle is published
Most articulating borescopes in this bracket bend in a single plane. The tip goes up and down, and if the thing you want to see is off to the left, you roll the whole cable until your bend points at it. Inside a confined space that is awkward and sometimes impossible, and the cable resists because it is twisted along its entire length.
Four way articulation removes that step. The tip is driven up, down, left and right, so you aim rather than rotate, and the 360 degree phrasing in the first bullet refers to the directions available to the tip rather than to how far it bends. A joystick is the right control, since two axes map onto one thumb, and the SUS304 stainless construction of the stick is a sensible detail to publish, because the control takes the load every time the tip is pushed against something solid.
What is not published is the bend angle. Direction count and bend angle are separate figures and both decide access: a tip that aims anywhere but bends only shallowly cannot get round a turn, while a tip that bends hard in one plane may beat it along a bore. The bending section length is missing too, which is the distance over which the probe curves and therefore the room the bend requires. For comparison, the other steerable borescope in this group publishes its angle and omits its plane count, which is the mirror image of the same omission. Joystick articulating borescopes collects the ones that publish both.
IP67 covers the probe and nothing covers the handset
The third bullet rates the 6.2 mm probe at IP67, which is a specific and checkable claim rather than the word waterproof standing on its own. The first digit covers solid ingress and 6 is the top of that scale, meaning dust tight. The second digit covers water and 7 means immersion, defined at a depth of one metre for thirty minutes.
For inspection work that is the right rating in the right place. A probe goes into sumps, drain traps, flooded cavities and wet bores, and it is dust at the tip that fogs a lens permanently rather than water.
The rating stops at the probe. A handset with a joystick shaft, a memory card slot, a charging port and a removable battery hatch has several openings, and the bullets give it no rating whatsoever. In practice that means the tip can go in the water and the thing in your hand cannot, which is worth remembering while leaning over an open inspection chamber. Treat the handset as an electronic device to keep dry, and put a strap on it.
A warning at 90 C and a battery you can swap
Two figures in the fifth bullet are better than they first look.
The high temperature warning at 90 C or above is published against the seller interest. It is an admission that the instrument has a thermal limit and can be harmed, and it is the kind of line most listings in this bracket leave out entirely. Note carefully what it is and is not: a warning threshold says when the tool will complain, not what the probe is rated to survive, and no material temperature rating appears anywhere. Even so, a borescope that tells you the tip is getting hot beats one that lets you discover it later, because the tip is out of sight by definition.
The detachable 5000 mAh battery with up to five hours of running is the other one, and detachable matters more than the capacity figure. A sealed borescope with a flat cell is finished for the day and has to find a socket. A borescope with a removable cell takes a charged spare in seconds, which is the difference between a site visit completing and a site visit being repeated. It also means the component that wears out fastest in ordinary use can be replaced, which sits neatly beside the replaceable cable.
The 180 degree image flip is a small thing that gets used constantly. Once a probe has been pushed into a space and rolled to clear a bend, the picture arrives upside down, and flipping it in firmware is quicker and safer than untwisting the cable. The 4X zoom is digital, so it magnifies without adding detail.
Reading the table with the cable question in mind
| Specification | Published in the listing |
|---|---|
| Articulation | Four way, described as 360 degree, joystick controlled |
| Joystick material | SUS304 stainless steel |
| Probe diameter | 6.2 mm |
| Probe ingress rating | IP67 |
| Lighting | Six plus one LEDs, three brightness levels |
| Display | 5 inch, described as HD |
| Storage | 32 GB card supported, photos and video, transfer to a computer |
| Battery | 5000 mAh, detachable, up to 5 hours continuous |
| High temperature warning | Triggers at 90 C or above |
| Image tools | 180 degree flip, 4X digital zoom |
| Cable replaceability | Stated, with different sizes said to be available |
| Available cable diameters and lengths | Not stated in the listing bullets |
| Length of the supplied probe | Not stated in the listing bullets |
| Articulation bend angle | Not stated in the listing bullets |
| Bending section length | Not stated in the listing bullets |
| Camera resolution and field of view | Not stated in the listing bullets |
| Focal range | Not stated in the listing bullets |
| Handset ingress rating | Not stated in the listing bullets |
| Material temperature rating for the probe | Not stated in the listing bullets |
The six plus one lighting arrangement earns a sentence of its own. Six LEDs around the lens plus one somewhere else is a layout, and layout is what determines whether a close surface is lit evenly or thrown into glare down one side. The bullets do not say where the extra light sits or whether it is controlled independently, which on a single lens probe is the difference between a side fill and a spare.
Worth it for the people who break cables
This is a borescope for somebody who uses one often enough to have destroyed one. If you have replaced an inspection camera because the cable failed while the screen was still perfect, the modular probe is the feature you have been waiting for, and the detachable battery follows the same logic. Four way steering on a joystick, an IP67 probe and a card that produces files for a report together make a credible working tool rather than a glance tool.
It is harder to recommend for one job. For that, the replaceability is value you will never collect, and the figures you would want in order to compare image quality, the camera resolution, the field of view, the focal range and the bend angle, are all absent. Articulating borescopes that publish those are easier to judge from the page.
Either way, the question to put to the seller first is the one the listing does not answer. Which cables fit, in what diameters and lengths, and how long is the one in the box. A modular system is worth whatever its catalogue contains.
Recommended Tools
Products shown because their documented specifications fit this guide. Price and availability are on Amazon and can change.
Frequently Asked Questions
Why does a replaceable snake cable matter?
Because on almost every borescope the probe is permanently attached and the probe is the part that dies. It gets crushed, kinked, pulled against a thread, or filled with water at the tip where a seal has aged, and when that happens the screen, the battery, the joystick and the card slot are scrapped with it. A modular cable makes the handset the durable asset and the probe the consumable, which is how professional instruments have always been built.
Which cable sizes can it take?
Not stated in the listing bullets, and that is the significant gap. The second bullet says the cable can be replaced with different sizes but gives no diameters, no lengths and no part numbering, and the supplied probe length is missing too. The value of a modular system is the catalogue behind it: a replaceable cable with one option available is a repair path, while a replaceable cable with several diameters and lengths is a system. Ask the seller which cables exist before buying on the strength of this feature.
What does four way articulation change compared with two way?
It removes a manoeuvre. A tip that bends in one plane has to be aimed by rolling the whole cable until the bend points at the thing you want to see, which inside a confined space is awkward and sometimes impossible, and the cable fights back because it is twisted along its length. A four way tip is driven up, down, left and right, so you aim instead of rotating. A joystick is the right control for that, since two axes map onto one thumb.
How far does the tip actually bend?
Not stated in the listing bullets. The 360 degree phrasing in the first bullet refers to the directions available to the tip rather than to how far it bends in any of them, and bend angle is a separate specification. It matters, because a tip that can aim anywhere but only bends a shallow amount cannot get round a turn, while a tip that bends hard in one plane may navigate a bore better. The bending section length is missing as well, and that is what decides how much room the bend needs.
What does the IP67 rating cover?
The 6.2 mm probe, according to the third bullet. The first digit covers solids and 6 is the top of that scale, meaning dust tight, which is what stops a lens fogging permanently after a few dusty cavities. The second digit covers water and 7 means immersion, defined at a depth of one metre for half an hour. Note where the rating stops: the handset, with a joystick shaft, a card slot, a charging port and a battery hatch, has no published rating at all, so the tip can go in the water and the thing in your hand cannot.
Is the high temperature warning the same as a heat rating?
No, and the difference is worth keeping straight. A warning triggering at 90 C or above tells you when the instrument will complain. A material temperature rating would tell you what the probe is built to survive, and no such figure is published. The warning is still worth having, and it is published against the seller interest, because the tip is out of sight by definition and finding out afterwards is the alternative.
Affiliate disclosure: Akermin earns a commission from qualifying Amazon purchases made through links on this page. Our editorial picks are based on documented specifications and owner feedback, not commissions.