Soldering an O2 sensor?

cedricverdier · 19th June 2007, 11:20

Hi all,
Some people complain about the Molex connectors and the corrosion that can spread up into the wires.

Some people in Thailand also complain about the jack-type connectors on the Evolution.

I was told that someone actually soldered the wires directly on the O2 sensors and it worked fine. Considering the fact that you normally don't have to change the sensors more than once a year (or more), having a permanent connection doesn't seem like a PITA.

But is there a real risk for the circuit board in the sensor because of the heat when you solder the wires to the O2 sensor?
Is there anyone here who tried that?

cheers

Corallaro · 19th June 2007, 11:39

Hi

in my simply homemade electronics i don't use any connectors, all wires is soldered

http://www.rebreatherworld.com/home-...-ida-71-a.html

i solder three (3) oxygen sensor "Analitical Instruments PSR-11-75D" directly on a multi-holes board and then i solder wires to display

i see that pins of "Analitical Instruments PSR-11-75D" are fitted and solderd into cells in other mode that tin solder... so if i solder it with tin don't de-solder its...

and it works perfectly

with other sensor to solder terminals probably you must dismount its...

Giovanni

PS

i have in my hands the cicuit board of an ol teledyne r-17..
on this board there aren't delicate components....solder the terminal is possible

decoweenie · 19th June 2007, 11:39

Quote: (Originally Posted by cedricverdier)

Is there anyone here who tried that?

Yes, the sensors are soldered on my Shearwater-YBOD by Carl @ Sartek.

They work fine, but I don't like it since it is a mjor PITA (for me) to change out the sensors, if needed, since I don't like the actual act of soldering itself.

paulraymaekers · 19th June 2007, 12:43

Quote: (Originally Posted by cedricverdier)

Hi all,
Some people complain about the Molex connectors and the corrosion that can spread up into the wires.

Some people in Thailand also complain about the jack-type connectors on the Evolution.

I was told that someone actually soldered the wires directly on the O2 sensors and it worked fine. Considering the fact that you normally don't have to change the sensors more than once a year (or more), having a permanent connection doesn't seem like a PITA.

But is there a real risk for the circuit board in the sensor because of the heat when you solder the wires to the O2 sensor?
Is there anyone here who tried that?

cheers

hello cedric, no need to solder the wires on the cells, if you just do 2 things:

always use tinned wires, and connect them correct on gold-plated molex connectors (solder/crimp/solder/grease) (see others posts)

works perfect!

regards
paul

Tom Rose · 19th June 2007, 15:55

I always have soldered cells in. Pre tin the lead. Pre tin the pin. Solder quickly.

Tom

david_1 · 19th June 2007, 21:58

Quote: (Originally Posted by paulraymaekers)

hello cedric, no need to solder the wires on the cells, if you just do 2 things:

always use tinned wires, and connect them correct on gold-plated molex connectors (solder/crimp/solder/grease) (see others posts)

works perfect!

regards
paul

Paul not trying to upset anyone here but the correct way to fit a crimp is to crimp first creating a mecanical fixing then solder if needed . (now all i need to do is learn to spell ) :-)

David

cedricverdier · 21st June 2007, 13:08

Thanks all,

So no risk of frying some components of the cell?...

Cheers

hoppyinca · 21st June 2007, 13:45

I have soldered several of the "mini-banana" plugs to Mk15 sensors (R-10DS), at 95USD a pop, the hardest part was getting the nerve to cut the first connector off...

never had a problem. if you are concerned, you could use a heat sink on the wire between the cell and the board? that's what I have been told.

I am by no means a soldering expert... not really good at it actaully... but I got it to work!

hoppyinca

narked at 90 · 4th August 2007, 13:38

i've managed to kill cells in experimants by soldering to them(k1-d) with out using a heat sink on the pin, but no problems if i use a heat sink next to the cell before you solder.
kind regards john routley

**nigelh** · 4th August 2007, 13:53

Quote: (Originally Posted by cedricverdier)

So no risk of frying some components of the cell?...

There is nothing fryable in an Inspiration cell that soldering to the Molex will reach. Even the PCB is soldered to the wires that poke up from the cell itself.

I wouldn't bother. In far worse environments than that we use nice gold crimps and apply a little silicon grease to the crimp to stop water being lifted into the wire and crimp by capillary attraction. Soldering just cooks the insulation on the wire and makes it brittle.

19th June 2007, 11:20	#1 (permalink)
cedricverdier S21 M.I.B. Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Worldwide! Posts: 494	Soldering an O2 sensor? Hi all, Some people complain about the Molex connectors and the corrosion that can spread up into the wires. Some people in Thailand also complain about the jack-type connectors on the Evolution. I was told that someone actually soldered the wires directly on the O2 sensors and it worked fine. Considering the fact that you normally don't have to change the sensors more than once a year (or more), having a permanent connection doesn't seem like a PITA. But is there a real risk for the circuit board in the sensor because of the heat when you solder the wires to the O2 sensor? Is there anyone here who tried that? cheers __________________ Cedric Verdier PADI Course Director, ANDI-IANTD-PSAI-TDI-DSAT-DAN-NAUI-CMAS Instructor Trainer Trimix (CCR and OC) and Cave Diving Instructor Trainer www.CedricVerdier.com DIRrebreather member
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19th June 2007, 11:39	#3 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: Soldering an O2 sensor? Quote: (Originally Posted by cedricverdier) Is there anyone here who tried that? Yes, the sensors are soldered on my Shearwater-YBOD by Carl @ Sartek. They work fine, but I don't like it since it is a mjor PITA (for me) to change out the sensors, if needed, since I don't like the actual act of soldering itself. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
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19th June 2007, 12:43	#4 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,437	Re: Soldering an O2 sensor? Quote: (Originally Posted by cedricverdier) Hi all, Some people complain about the Molex connectors and the corrosion that can spread up into the wires. Some people in Thailand also complain about the jack-type connectors on the Evolution. I was told that someone actually soldered the wires directly on the O2 sensors and it worked fine. Considering the fact that you normally don't have to change the sensors more than once a year (or more), having a permanent connection doesn't seem like a PITA. But is there a real risk for the circuit board in the sensor because of the heat when you solder the wires to the O2 sensor? Is there anyone here who tried that? cheers hello cedric, no need to solder the wires on the cells, if you just do 2 things: always use tinned wires, and connect them correct on gold-plated molex connectors (solder/crimp/solder/grease) (see others posts) works perfect! regards paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
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19th June 2007, 15:55	#5 (permalink)
Tom Rose Still Learning Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Prism Topaz Other CCR Home Build Join Date: Oct 2005 Location: USA,North Carolina Posts: 330	Re: Soldering an O2 sensor? I always have soldered cells in. Pre tin the lead. Pre tin the pin. Solder quickly. Tom __________________ The 50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong the first time. www.atlimp.com
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19th June 2007, 21:58	#6 (permalink)
david_1 New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Jul 2006 Location: uk Posts: 37	Re: Soldering an O2 sensor? Quote: (Originally Posted by paulraymaekers) hello cedric, no need to solder the wires on the cells, if you just do 2 things: always use tinned wires, and connect them correct on gold-plated molex connectors (solder/crimp/solder/grease) (see others posts) works perfect! regards paul Paul not trying to upset anyone here but the correct way to fit a crimp is to crimp first creating a mecanical fixing then solder if needed . (now all i need to do is learn to spell ) :-) David
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21st June 2007, 13:08	#7 (permalink)
cedricverdier S21 M.I.B. Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Worldwide! Posts: 494	Re: Soldering an O2 sensor? Thanks all, So no risk of frying some components of the cell?... Cheers __________________ Cedric Verdier PADI Course Director, ANDI-IANTD-PSAI-TDI-DSAT-DAN-NAUI-CMAS Instructor Trainer Trimix (CCR and OC) and Cave Diving Instructor Trainer www.CedricVerdier.com DIRrebreather member
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21st June 2007, 13:45	#8 (permalink)
hoppyinca New Member Current Rebreather/s: MK 15.X Other Rebreather/s: Join Date: Jun 2005 Location: Laguna Niguel, CA USA Posts: 252	Re: Soldering an O2 sensor? I have soldered several of the "mini-banana" plugs to Mk15 sensors (R-10DS), at 95USD a pop, the hardest part was getting the nerve to cut the first connector off... never had a problem. if you are concerned, you could use a heat sink on the wire between the cell and the board? that's what I have been told. I am by no means a soldering expert... not really good at it actaully... but I got it to work! hoppyinca
(Offline)

4th August 2007, 13:38	#9 (permalink)
narked at 90 In my own little world Current Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Classic Kiss Other CCR Dolphin Home Build Join Date: Feb 2005 Location: middlands uk Posts: 1,010	Re: Soldering an O2 sensor? i've managed to kill cells in experimants by soldering to them(k1-d) with out using a heat sink on the pin, but no problems if i use a heat sink next to the cell before you solder. kind regards john routley __________________ CHECK OUT OUR INTERWEBS FOR CUSTOM REBREATHER UPGRADES *WWW.NARKEDAT90.CO.UK* *WWW.GRPSERVICES.COM*
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4th August 2007, 13:53	#10 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 824	Re: Soldering an O2 sensor? Quote: (Originally Posted by cedricverdier) So no risk of frying some components of the cell?... There is nothing fryable in an Inspiration cell that soldering to the Molex will reach. Even the PCB is soldered to the wires that poke up from the cell itself. I wouldn't bother. In far worse environments than that we use nice gold crimps and apply a little silicon grease to the crimp to stop water being lifted into the wire and crimp by capillary attraction. Soldering just cooks the insulation on the wire and makes it brittle. __________________ nigelh
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