Molex Part # for rEvo O2 sensor

[Heat Miser]

Hi,

I'm going to make the DiveTech O2 / Nitrox Analyser, can anyone tell me what size Molex Female connector to get.

Please post me a link to the part number please (that will fit into rEvo R200 – Oxygen Sensors)

Regards

https://www.divetech.com/post/the-20-nitrox-analyzer

 

[tbone1004]

for standard molex sensors. The Revo takes standard sensors, the only difference in the "revo" part number is a tighter tolerance on mV specification, so it's a special bin.

crimp tool
https://www.amazon.com/gp/product/B078WNZ9FW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
contacts
https://www.amazon.com/gp/product/B07QZ647V4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
body
https://www.amazon.com/gp/product/B07QY3LCPW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[Heat Miser]

for standard molex sensors. The Revo takes standard sensors, the only difference in the "revo" part number is a tighter tolerance on mV specification, so it's a special bin.

body
https://www.amazon.com/gp/product/B07QY3LCPW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Thanks @tbone1004

I was a bit confused by the photo on Amazon as it had 6 circuits and no ridges, but when I plugged in the part number 22013037 elsewhere I got this photo. Which look like whats in the rebreather, so thanks

0022013037 Molex | Connectors, Interconnects | DigiKey

Final question do you know why a dream O2 sensor splitter and a shearwater O2 sensor splitter are different. They look the same?

 

[Tracy]

I source them from Digi Key

 

[stuartv]

That's cool and all, but are you really going to get much use out of that before you figure out you really need a trimix analyzer?

 

[Heat Miser]

That's cool and all, but are you really going to get much use out of that before you figure out you really need a trimix analyzer?

Yep I had thought about that, its more of an interesting project to do. I'm only Mod 1 so I have honestly only dived Tx 11 times, and for those 3 fills I've used the diveshop/instructor's O2/Helium analyser. The original publisher is investigating ways to make a 3d printed trimix analyzer, so if I can make 2-3 of these Nitrox analysers, I'll be good to go if he ever gets that one off the ground. I like the idea of recycling the old rEvo cells. I throw out 2 every year.

Lots of things to buy yet .... booster, compressor, DPV .... trimix analyzer ..... backup perdix or teric ,,,, boat

 

[Divetech Cayman]

That's cool and all, but are you really going to get much use out of that before you figure out you really need a trimix analyzer?

I'm working on making a trimix analyzer next. Waiting on parts to arrive.

However the O2 analyzer is a good project to cut your teeth on when it comes to wiring, programming, printing, assembling, etc. The components for the Tx version will be largely the same, so they could be removed and re-used.

Tony

 

[tbone1004]

Thanks @tbone1004

I was a bit confused by the photo on Amazon as it had 6 circuits and no ridges, but when I plugged in the part number 22013037 elsewhere I got this photo. Which look like whats in the rebreather, so thanks

0022013037 Molex | Connectors, Interconnects | DigiKey

Final question do you know why a dream O2 sensor splitter and a shearwater O2 sensor splitter are different. They look the same?

those are parts that I've purchased, so they at least came in correct for me.

I have no idea why the sensor splitters are different. I personally do not like sensor splitters and do not use them preferring single monitors for manual ccr's.

If you are working on doing a helium analyzer, PLEASE PLEASE PLEASE consider doing a 3-gas analyzer and putting CO in there.

 

[Divetech Cayman]

I have no idea why the sensor splitters are different. I personally do not like sensor splitters and do not use them preferring single monitors for manual ccr's.

If you are working on doing a helium analyzer, PLEASE PLEASE PLEASE consider doing a 3-gas analyzer and putting CO in there.

Some splitters have a 10 ohm resistor in them to isolate any potential short circuits and keep the cell data separate. Without it, a failure of one device (a flood of the rEvo dream for example,) would affect the sensor readings on the still good device sharing that data.

The next version will be just helium and O2. I need to work in incremental steps, CO has some complications I'm not ready to tackle just yet.

Tony

 

[tbone1004]

Some splitters have a 10 ohm resistor in them to isolate any potential short circuits and keep the cell data separate. Without it, a failure of one device (a flood of the rEvo dream for example,) would affect the sensor readings on the still good device sharing that data.

The next version will be just helium and O2. I need to work in incremental steps, CO has some complications I'm not ready to tackle just yet.

Tony

they're necessary evils if you subscribe to required dual monitor solutions. On digital CCR's it's one thing where data can be sent out from the O2 board, but on analog CCR's I would much rather use a single monitor than try to split them.