Surfmaster potentiometers sealing

[Malospelos]

Good morning, I have been investigating and I have not found anything, I don't know if anyone can post a photo or some help,
I have finished an elongated SurfMaster PCB, I want to put it in a SeaShell case very similar to the original, the point is.

On the original whites, how are the potentiometers sealed so water doesn't get in?

In minelab Excalibur, each potentiometer has several joints inside the case and one at the end.

I haven't found anything about these machines and I don't know mechanically how they seal. Is the potentiometer special? Or do they put a gasket when fixing the potentiometer to the box?

This is an idea that occurred to me to remove the potentiometers from the box without water getting in, with a threaded bushing with a fixing nut to the box and an intermediate gasket.

The potentiometer shaft with gaskets is inserted into the bushing. I haven't seen this in white, I don't know how they would do it.



Thank you for your help

[ionut_mtb]

Hello. Original surf pi use “apm hexseal”. You can also use “p16np” potentiometer but is not suitable for diving - more like underwater 1-2meters

[Carl-NC]

You can also use “p16np” potentiometer but is not suitable for diving - more like underwater 1-2meters

Also not good for salt water.

[GeoMax]

Good morning, I have been investigating and I have not found anything, I don't know if anyone can post a photo or some help,
I have finished an elongated SurfMaster PCB, I want to put it in a SeaShell case very similar to the original, the point is.

On the original whites, how are the potentiometers sealed so water doesn't get in?

In minelab Excalibur, each potentiometer has several joints inside the case and one at the end.

I haven't found anything about these machines and I don't know mechanically how they seal. Is the potentiometer special? Or do they put a gasket when fixing the potentiometer to the box?

This is an idea that occurred to me to remove the potentiometers from the box without water getting in, with a threaded bushing with a fixing nut to the box and an intermediate gasket.

The potentiometer shaft with gaskets is inserted into the bushing. I haven't seen this in white, I don't know how they would do it.



Thank you for your help

Hi Malospelos,

A few days ago I saw this interesting approach to sealing a potentiometer in a YouTube video and took a screenshot. The detector is also a Surfmaster PI longboard in a waterproof case that you described. Is it perhaps your YouTube video too?

[Malospelos]

Good morning, thank you for your information, I didn't know that type of nut (apm hexseal) existed, I found it most curious, you always learn something new.

I think I will make the bushings on a CNC lathe in polycarbonate with a 316 stainless steel shaft in the center and its O-rings and at the same time they will fit into the normal potentiometer, like Minelab Excalibur does.

I will secure the bushings with a nut and then glue them with epoxy.

The white alternative is simple but I don't see it as completely reliable.

I will put a 5-pin connector for the coil and battery charging.

Thanks for everything