SST Emitters and Water

[Codiak]

So here a couple stupid questions:

Assuming sealed solder points can you expose a Domed SST directly to water?

How about a De-Domed?

 

[Morelite]

I would say no to both. you need to protect more than just the solder points, the die itself must be protected as water is electrically conductive if not pure.

 

[Codiak]

More exactly then... if I sealed everything right to the dome?

At that point it might be better to just de-dome the thing and protect/seal everything with a piece of glass. With no air between the layers the glass could remain fairly thin.

 

[gcbryan]

I can't say regarding the SST's but I've flooded a MC-E in salt water and it still works.

I wouldn't recommend this for long periods of time however.

Are you intending to have a dive light without a front sealed lens?

 

[Codiak]

I'm planning on mounting the Emitter on the heatsink with driver and cable... then use a chopped 2D Mag handle for the sleeve with a lense mounted one end, cable coming out the other to the battery pack.

Better visual might be Emitter et al is the Piston and the Mag handle is the Cyclinder.

 

[H20doctor]

XRE have with standed a complete salt water flood and still work fine after a fresh water rinse...In fact they still run , while submersed..

 

[Delphinus]

I'm planning on mounting the Emitter on the heatsink with driver and cable... then use a chopped 2D Mag handle for the sleeve with a lense mounted one end, cable coming out the other to the battery pack.

Better visual might be Emitter et al is the Piston and the Mag handle is the Cyclinder.

Forget it, a large part of the new leds have a silicone dome that if compressed will damage the emiter, the old Luxeon V and III will work but after a short period the dome will be scratched.

The only way that will work is to completly pot the led with a clear urethane resin but this is more expensive that a glass and o-ring but better if you don't have the tools to machine a head for the led.

Miguel
Portugal

 

[Codiak]

A resin cap simple enough and I have some in my plastics kit.

 

[Delphinus]

A resin cap simple enough and I have some in my plastics kit.

Just make sure the resine is rigid and not compress by the water pressure and that it won't turn yellow by UV.

But the best thing is to try it with one inexpensive led :thumbsup: