This happened to a new torch

[poh6702]

Brand is Scubalamp. A new brand from China. Maybe u can drop them an email.


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Thanks, the question is if they are not in Scuba industry and trying to build products without proper field (sea) test, then what about other torches sold so far. Anyone has a similar problem with torches bought from the  during ADEX?

[mentalist]

Thanks, the question is if they are not in Scuba industry and trying to build products without proper field (sea) test, then what about other torches sold so far. Anyone has a similar problem with torches bought from the  during ADEX?

They are in scuba industry. They have full range of products like diving torch, video light. I know some people using their torches or video light, not this model. But first time see this.

[woobc]

looks like from the ADEX stall manned by mainland Chinese ladies ??

[diver-hloc]

Same problem I had with a big torchlight I got from China, during a dive in Manado.... there must be an electric leak somewhere an a small charge is passing through the body of the light... its like electroplating....

[poh6702]

Same problem I had with a big torchlight I got from China, during a dive in Manado.... there must be an electric leak somewhere an a small charge is passing through the body of the light... its like electroplating....

Come and think of it, this torch is head twist turn on design, the body is the conductor for negative return path, when in water the torch lighted up by itself but very dimly lighted, at first I tot the torch flooded, but when opened up, it was dry inside. the water actually form a high resistant but closed loop, I was wandering why the corrosion is so bad, will use the TG4 to take a close up pic of those corrosion pointS.

[poh6702]

Here are some close up pix of the spots:









Above are the close up image of the white patches, looks like all the patches has some sorts of arcing hot spot.

[diver-hloc]

Same same but difference.... but dare not use again....

[poh6702]

Haha.. it must be something to do with current (like electro platting effect), these are aluminum materials, and those spots don't looks like corrosion, Any scientist here can help to enlighten us?

BTW, your torch looks like also a twist on and twist off design, I suspect for such design, the paint is an insulator, the body is the negative return path, when we tighten the front cap, the negative plate of the circuit (for my case of front twist on switch design) touches the top of the body and form a close circuit. When this torch is in the sea water, the water form a high resistant path shorting the body and the front cap, that is why the torch was lighted up dimly when in sea water, as well as such effect happened.

If I have a chance to get hold of 3 of this torches, I will try to do such experiment, will bring the 3 of them into sea water in these conditions:

1. first torch will not have battery inside.
2. Second torch will have battery and turn on all the time when in water
3. Third torch will have the battery but turn off all the time while in water like my poor torch in discussion here.

But since I don't have 3 of this torch, then no way to find out what is the real cause.

[hellhole]

Then just use the one u have without battery.  If it get worst then u koe

[trekdive]

KP, not worth getting 3 more at $30+ each for crash test.