what are the better sensor molex connectors ?

Gilles · 1st October 2007, 10:51

Quote: (Originally Posted by Drmike)

they are chrome plated. part no: 449-994, 998

after soldering the wires to the plug (left) I slide over the clear plastic sleeve (middle) then standing it upright fill it up with resin to pot it.

What is the "potting resin" that you use?

teomannaskali · 1st October 2007, 11:21

To the best of my knowledge, if you want a good connector, then first the ground of the cell and the ground of the display or instrument have to be connected, only then should the signal be connected.

Have I burned anything like this? No,
But I know our electronics guys fried some expensive sensors (not Rebreather related) this way...

Teoman

**jmurba** · 2nd October 2007, 06:55

Hi Mike ,

thank for all info, I've just visited pat's duffy web looking r22 with fitted with jack sensors and did not find any, the onlyone i find is the r-17 wich >I tought to be a land sensor for surface gas analyzers.
what do you mean saying "available with r22's " ?
regards
jean mi

Quote: (Originally Posted by Drmike)

I have found the jack plug type connectors (available

with R22s) to be far far more practical in rbs.

My advice would be, when its time to change sensors, to change the cells to jack plug type, solder jack plugs (available from RS) to your sensor wires then pot the inside of the jackplug housing to make it whole thing water proof.

IMO molex are just not suitable in a moisture rich environment like inside an Rebreather

The most Ive had to do is wipe the jackplugs with a cloth every now and then to remove any scale. They have been flooded several times and everytine I wash down my unit they (the jack plugs) get emersed/soaked (try that with a amolex

) - no issues

SimonK · 2nd October 2007, 16:20

Quote: (Originally Posted by jmurba)

Hi Mike ,

thank for all info, I've just visited pat's duffy web looking r22 with fitted with jack sensors and did not find any, the onlyone i find is the r-17 wich >I tought to be a land sensor for surface gas analyzers.
what do you mean saying "available with r22's " ?
regards
jean mi

You need the R17D

http://www.teledyne-ai.com/pdf/diving.pdf

Simon

Drmike · 3rd October 2007, 06:25

Quote: (Originally Posted by jmurba)

Hi Mike ,

thank for all info, I've just visited pat's duffy web looking r22 with fitted with jack sensors and did not find any, the onlyone i find is the r-17 wich >I tought to be a land sensor for surface gas analyzers.
what do you mean saying "available with r22's " ?
regards
jean mi

opps my mistake, should have said R-17D

Teledyne Analytical Instruments | Applications

**jmurba** · 3rd October 2007, 08:41

Quote: (Originally Posted by Drmike)

opps my mistake, should have said R-17D

Teledyne Analytical Instruments | Applications

HiMikr,

thanks for info, can we say that the only difference btw r22's and R17 in the connector ?
regards
jean mi

York · 3rd October 2007, 12:18

Quote: (Originally Posted by jmurba)

HiMikr,

thanks for info, can we say that the only difference btw r22's and R17 in the connector ?
regards
jean mi

Hi Jean Mi,
if you follow Mike's link you get the technical information of both sensors. The specs are identical except for the connector, and the R-17D is quoted with a 7-13mV in air (vs. R22-D 8/13mV - however many users reported 7mV on new R22-Ds and have been told off when asked for an exchange - apparently the manufacturer change these specs to 7-13mV without telling anyone ...).

There should be no reason why you couldn't use the one in exchange for the other, except in a Meg you might have some trouble connecting the plug due to space limitations - in which case one could attach the plug prior to inserting the sensor. Will have to try that.

Thanks Mike

J

**jmurba** · 3rd October 2007, 13:17

Quote: (Originally Posted by York)

Hi Jean Mi,
if you follow Mike's link you get the technical information of both sensors. The specs are identical except for the connector, and the R-17D is quoted with a 7-13mV in air (vs. R22-D 8/13mV - however many users reported 7mV on new R22-Ds and have been told off when asked for an exchange - apparently the manufacturer change these specs to 7-13mV without telling anyone ...).

There should be no reason why you couldn't use the one in exchange for the other, except in a Meg you might have some trouble connecting the plug due to space limitations - in which case one could attach the plug prior to inserting the sensor. Will have to try that.

Thanks Mike

J

Hi,
I am gonna ask pat duffy, I think you are rigth , however I've lingered in the rebreather world (not the web) for a couple of years now and so far never eard about any rebreather using the R-17 sensors.
It is probably a lack of knowledge.
What rebreather officialy uses the r-17 ?.
has the r-17 a proper thermoresistant circuit to correct the temperature drift ?,
Are we sure the R-17 has a semi permeable membrane to protect it from humidity ?
I have straight compared r22 and r17 data sheets and as a matter of fact they are similar, but no one says it can be used in a rebreather...
I want to be sure not to assume that it is ok for rebreathers.
regards
jean mi

York · 3rd October 2007, 13:37

Quote: (Originally Posted by jmurba)

Hi,
I am gonna ask pat duffy, I think you are rigth , however I've lingered in the rebreather world (not the web) for a couple of years now and so far never eard about any rebreather using the R-17 sensors.
It is probably a lack of knowledge.
What rebreather officialy uses the r-17 ?.
has the r-17 a proper thermoresistant circuit to correct the temperature drift ?,
Are we sure the R-17 has a semi permeable membrane to protect it from humidity ?
I have straight compared r22 and r17 data sheets and as a matter of fact they are similar, but no one says it can be used in a rebreather...
I want to be sure not to assume that it is ok for rebreathers.
regards
jean mi

I'm sure Mike (or others) will jump in if I'm wrong, but the ouroboros uses R-17Ds
http://www.ccrb.co.uk/Pdfs/ouroboros...st3v0c-1g3.pdf
e.g. p.119

Joerg

Drmike · 3rd October 2007, 14:36

Quote: (Originally Posted by York)

I'm sure Mike (or others) will jump in if I'm wrong, but the ouroboros uses R-17Ds
http://www.ccrb.co.uk/Pdfs/ouroboros...st3v0c-1g3.pdf
e.g. p.119

Joerg

yes boris uses them

1st October 2007, 10:51	#11 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 762	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by Drmike) they are chrome plated. part no: 449-994, 998 after soldering the wires to the plug (left) I slide over the clear plastic sleeve (middle) then standing it upright fill it up with resin to pot it. What is the "potting resin" that you use? __________________ Gilles http://www.dirrebreather.com
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1st October 2007, 11:21	#12 (permalink)
teomannaskali Custom Title Allowed! Current Rebreather/s: Home Build Other Rebreather/s: Not Bought Yet Home Build Join Date: Feb 2006 Location: Istanbul TR Posts: 385	Re: what are the better sensor molex connectors ? To the best of my knowledge, if you want a good connector, then first the ground of the cell and the ground of the display or instrument have to be connected, only then should the signal be connected. Have I burned anything like this? No, But I know our electronics guys fried some expensive sensors (not Rebreather related) this way... Teoman
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2nd October 2007, 06:55	#13 (permalink)
jmurba wet bear Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: May 2006 Location: cannes france Posts: 861	Re: what are the better sensor molex connectors ? Hi Mike , thank for all info, I've just visited pat's duffy web looking r22 with fitted with jack sensors and did not find any, the onlyone i find is the r-17 wich >I tought to be a land sensor for surface gas analyzers. what do you mean saying "available with r22's " ? regards jean mi Quote: (Originally Posted by Drmike) I have found the jack plug type connectors (available with R22s) to be far far more practical in rbs. My advice would be, when its time to change sensors, to change the cells to jack plug type, solder jack plugs (available from RS) to your sensor wires then pot the inside of the jackplug housing to make it whole thing water proof. IMO molex are just not suitable in a moisture rich environment like inside an Rebreather The most Ive had to do is wipe the jackplugs with a cloth every now and then to remove any scale. They have been flooded several times and everytine I wash down my unit they (the jack plugs) get emersed/soaked (try that with a amolex ) - no issues __________________ when will I be able to think about something else then spending hours underwater, when will I be normal ? http://web.mac.com/jmurba/Site_2/home.html http://web.mac.com/jmurba/Site_3/home.html
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2nd October 2007, 16:20	#14 (permalink)
SimonK Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Oct 2005 Location: Cumbria UK Posts: 231	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by jmurba) Hi Mike , thank for all info, I've just visited pat's duffy web looking r22 with fitted with jack sensors and did not find any, the onlyone i find is the r-17 wich >I tought to be a land sensor for surface gas analyzers. what do you mean saying "available with r22's " ? regards jean mi You need the R17D http://www.teledyne-ai.com/pdf/diving.pdf Simon
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3rd October 2007, 06:25	#15 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,323	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by jmurba) Hi Mike , thank for all info, I've just visited pat's duffy web looking r22 with fitted with jack sensors and did not find any, the onlyone i find is the r-17 wich >I tought to be a land sensor for surface gas analyzers. what do you mean saying "available with r22's " ? regards jean mi opps my mistake, should have said R-17D Teledyne Analytical Instruments \| Applications __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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3rd October 2007, 08:41	#16 (permalink)
jmurba wet bear Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: May 2006 Location: cannes france Posts: 861	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by Drmike) opps my mistake, should have said R-17D Teledyne Analytical Instruments \| Applications HiMikr, thanks for info, can we say that the only difference btw r22's and R17 in the connector ? regards jean mi __________________ when will I be able to think about something else then spending hours underwater, when will I be normal ? http://web.mac.com/jmurba/Site_2/home.html http://web.mac.com/jmurba/Site_3/home.html
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3rd October 2007, 12:18	#17 (permalink)
York probubbly not Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Mar 2005 Location: Bristol, UK Posts: 118	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by jmurba) HiMikr, thanks for info, can we say that the only difference btw r22's and R17 in the connector ? regards jean mi Hi Jean Mi, if you follow Mike's link you get the technical information of both sensors. The specs are identical except for the connector, and the R-17D is quoted with a 7-13mV in air (vs. R22-D 8/13mV - however many users reported 7mV on new R22-Ds and have been told off when asked for an exchange - apparently the manufacturer change these specs to 7-13mV without telling anyone ...). There should be no reason why you couldn't use the one in exchange for the other, except in a Meg you might have some trouble connecting the plug due to space limitations - in which case one could attach the plug prior to inserting the sensor. Will have to try that. Thanks Mike J
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3rd October 2007, 13:17	#18 (permalink)
jmurba wet bear Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: May 2006 Location: cannes france Posts: 861	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by York) Hi Jean Mi, if you follow Mike's link you get the technical information of both sensors. The specs are identical except for the connector, and the R-17D is quoted with a 7-13mV in air (vs. R22-D 8/13mV - however many users reported 7mV on new R22-Ds and have been told off when asked for an exchange - apparently the manufacturer change these specs to 7-13mV without telling anyone ...). There should be no reason why you couldn't use the one in exchange for the other, except in a Meg you might have some trouble connecting the plug due to space limitations - in which case one could attach the plug prior to inserting the sensor. Will have to try that. Thanks Mike J Hi, I am gonna ask pat duffy, I think you are rigth , however I've lingered in the rebreather world (not the web) for a couple of years now and so far never eard about any rebreather using the R-17 sensors. It is probably a lack of knowledge. What rebreather officialy uses the r-17 ?. has the r-17 a proper thermoresistant circuit to correct the temperature drift ?, Are we sure the R-17 has a semi permeable membrane to protect it from humidity ? I have straight compared r22 and r17 data sheets and as a matter of fact they are similar, but no one says it can be used in a rebreather... I want to be sure not to assume that it is ok for rebreathers. regards jean mi __________________ when will I be able to think about something else then spending hours underwater, when will I be normal ? http://web.mac.com/jmurba/Site_2/home.html http://web.mac.com/jmurba/Site_3/home.html
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3rd October 2007, 13:37	#19 (permalink)
York probubbly not Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Mar 2005 Location: Bristol, UK Posts: 118	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by jmurba) Hi, I am gonna ask pat duffy, I think you are rigth , however I've lingered in the rebreather world (not the web) for a couple of years now and so far never eard about any rebreather using the R-17 sensors. It is probably a lack of knowledge. What rebreather officialy uses the r-17 ?. has the r-17 a proper thermoresistant circuit to correct the temperature drift ?, Are we sure the R-17 has a semi permeable membrane to protect it from humidity ? I have straight compared r22 and r17 data sheets and as a matter of fact they are similar, but no one says it can be used in a rebreather... I want to be sure not to assume that it is ok for rebreathers. regards jean mi I'm sure Mike (or others) will jump in if I'm wrong, but the ouroboros uses R-17Ds http://www.ccrb.co.uk/Pdfs/ouroboros...st3v0c-1g3.pdf e.g. p.119 Joerg
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3rd October 2007, 14:36	#20 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,323	Re: what are the better sensor molex connectors ? Quote: (Originally Posted by York) I'm sure Mike (or others) will jump in if I'm wrong, but the ouroboros uses R-17Ds http://www.ccrb.co.uk/Pdfs/ouroboros...st3v0c-1g3.pdf e.g. p.119 Joerg yes boris uses them __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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