Source for ppO2 monitor

[Digger]

OK, just playing about with things, but could really do with a means of monitoring ppO2 in the loop, for safety more than anything.

Any suggestions on cheap sources, good diagrams and a list of B&Q parts? I'd consider complete units because I'm useless with electronics, and can't be bothered burning myself any more. It's also for safety, and it seems pointless me building something that will eventually bring me down. Much better to have someone to sue.

Thanks in advance. I fell all like I'm in the little RB club now. Strange.

Digs.

[Drmike]

sorry posted in wrong place
try these guys

http://www.ppo2.com/order.htm

and welcome to the club!

[Drmike]

Or chris at http://tech-blue.com/en-us/dept_32.html has single to tripple KISS displays

[narked at 90]

hi digger you can get a cheepy kit for www.oxycheq.com and put it in your own housing or i can give you a parts list!
www.ppo2 is a good place and mark has some realy good stuff but it is a little prisy after you shiped it from the usa!
or you can try your hand at a HUD go to this guys site,it a welth of info::http://www.atlimp.com/hudparts.htm
if you need any help with the electronics just ask mate it's really no biggy.
best regards john routley

[Drmike]

Ahh finaly found it. I couldnt recall the address and had to search about a bit for it but here is a good source too - http://insane.bug-e.net/Puffer/PPO2/index.html

[NotDeadYet]

Originally Posted by Drmike

Ahh finaly found it. I couldnt recall the address and had to search about a bit for it but here is a good source too - http://insane.bug-e.net/Puffer/PPO2/index.html

It's an interesting link. Has anyone used his meters?

The easy part is building a display, it is just a panel meter with a replacement potentiometer. For about £60 Oxycheq do a DIY analyser kit which works very well and you even get a sensor with it.

The hard part is the housing. The PPO2 housing is dead simple but the problem is getting the delrin plugs machined. Oxycheq did sell them but they were out of stock last time I asked.

This guy in South Africa seems to have done quite a nice complete unit and at £140 isn't too expensive for what you are getting. It looks very well made. When my new RB comes I might add one to my old RB.

[Drmike]

Originally Posted by NotDeadYet

It's an interesting link. Has anyone used his meters?

.

Couple of mates of mine have in Australia. Looks good. They even modified it to include a home made HDD with an old mobile phone vibrator bit like Kevins DIVA.

All they had to do was use the wires off the Circuit board that originaly run the buzzer alarm and the led shown in the case and ran them out to a home made HDD.


details can be found here http://www.trimixdivers.com/Navigate.do click on number 33

Looks a bit like this -

[Digger]

Cheers for all these links guys. Looks like I'm going to need a whole lot of money, or maybe an electronics student at the uni. I'm seeing some favours getting called in now!!!

Is there a 2nd hand market in these things? If so, where would I look? RB lists? If any of you are regularly on them, can you let me know if they pop up?

This is why I love YD. Straight answers to stupid questions. Glad to see we're back to normal.

Digs.

[Digger]

Can I ask what the delrin plugs are for? WHat do they do? Surely this is going to be a sealed housing with a coupld of cable glands maybe? I've not read up on all these links properly, but can't see a lot of reference to them?

[NotDeadYet]

Hi Digger,

the ppO2 housing is a piece of clear polycarb tubing. On each end are a couple of delrin caps with o-ring seals. On one end cap is a cable gland for connection to the sensors. On the other is a removable plug (like a reg blanking plug)to allow for calibrating the display. One end cap needs to be removable to allow for changing the battery. The other end cap can be glued in place.

If you have access to a lathe then you can make up a housing very cheaply. If not then find someone abroad to do it, it costs a bomb to get anything machined here, that isn't even counting materials. The stuff I'm getting done for my new RB is being done in the US, Poland and Switzerland for a fraction of the price. It was just too much to get a UK machine shop to do the work I wanted.

The actual electronics are dead cheap. The last display I built cost £10 for the LCD, 50p for the pot, 5p for a resistor, £1.50 for a mono lead and 25p for a battery connector. You can wire it all up in 1/2 an hour. Like I said, the big problem is finding a housing.

If you want to try the Munro/PPO2 meter then www.golemgear.com had some housings for sale a few months ago.

BTW if you ever fancy meeting up for some more test diving then I take my monsters to Dorothea where no-one can shout at me! I should have my new baby at the start of October.

Cheers,

Stuart