analytical industries sensors

paulraymaekers

I keep using teledyne R22D, but I found that statistically 1 out of 10 can not be used on the rEvodream (below 8.7 and above 13 in air...)
if above 13, no problem, must be replaced by the vendor becaus out of manufacturer specs!
if at 8.5... a problem!

I think some rebreather manufacturers get 'sorted-out' cells :-) (narrower specs)

regards
paul

__________________
www.rEvo-rebreathers.com

.... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...

n2diving

Dive Rite Express has been selling the R-22D and R-17D from Teledyne for some time and our experience with them was good until Teledyne moved their production out-of-house to Mexico. Since that time, our customers have occassionally encountered sensors that have a low mv output (just barely 8mv in air/40 mv in O2 when they are new) and also the occassional problem with the sensor housing itself spliting open. We replace the sensors, no questions, and so does Teledyne but they do insist that there is not a pattern of problems. I frankly don't agree, and for a variety of reasons we took a large quantity of the AI sensors for evaluation... we have been evalutating them in the Optima for some time now. Overall our experience has been very good. We have had a single failure of the AI, and AI was extremely responsive in identfying the specific cause, which appeared to be a insolated incident. We have also evaluated the AI sensors with the Delta P VR3 dive computer and the Vandagraph VN202 analyser. The AI sensors have proven in our testing to be plug compatible with the Teledyne R-22D and R-17D versions. We expect to shortly be offering the AI sensors, replacing the Teledyne, because we feel the AI is a better quality and more reliable sensor.

FYI, I had two optimas (one personal unit and one for rental/training), each configured with four sensors as two Teledyne and two AI. I noticed the AI sensors consistently exhibited less of the typical 'moisture' problems we all see in rebreathers. I finally decided I liked the AI versions so much more that I swapped them around so my personal unit now has all AI sensors.

-- Mark

Gregv

I have used AI sensors for a couple of years. I recently had two from three fail, one out of the box and the other within 4 weeks of installing it in my mCCR Dolphin. RC Dive replaced them immediately without question, and to their credit, AI got back to me some time later by email describing what they found when they examined the sensors at the factory:

---------------------------------

S/N: 50901742 = I removed the sensor from it's housing and removed the PCB from the sensors. I discovered some small crystals had formed on the anode. The crystals have bridged from the anode to the cathode flag. This caused a drop in output causing the sensors to go out of it's standard spec of 8.5 - 13 mV. The crystals are usually caused by contamination. We do have a proprietary cleaning technique we use to clean all of our lead anodes for all of our oxygen sensors. But nothing is foolproof, apparently in this instance we didn't catch all of the contaminance and some crystals were able to be formed.

S/N: 50901743 = This sensor had a 0.0 mV output. I removed the sensor from the housing and the PCB from the sensor. The Positive lead from the sensor to the PCB was broken causing the sensor to read 0.0 mV. I don't have an explanation why the wire is broken or how it got broken. All of our sensor are tested a minimum of 3 times before they are ready to ship. I am sorry that I don't have a better answer for you on this one.

-------------------------------------------------------

I change out the sensors at 12 months and haven't had any problems prior or since.

Greg

jmurba

does somehone has any experience with the analytical industries 02 sensors?

+++++ I've tried 3 a coupe a years ago...it's been a bad expérience...the tensions were very low when i opened the bags...they lasted less the 1 year and ended with bad reactions..teledyne for me nothing else

regards

jean mi

Mark Gregus

Hi Guys,

My name is Mark and I am the Diving sales manager for Analyitcal Industries Inc. if you have any questions for me regarding O2 sensors mine or my competitors please contact me at gregusm@aii1.com

Best regards,

__________________
Mark Gregus
Diving Sales Manager
Analytical Industries Inc.
909 392 6900
email: gregusm@aii1.com

jradomski

Now that RCdive is out of the picture who is selling AI cells (especially at wholesale) ..

With the recent problems with Teledyne cells I am thinking about giveing AI cells another look..

__________________
Joe Radomski
CCR Trimix Instructor Trainer
ANDI Instructor Trainer Director #10

All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.

Marc T

Hi JMU
are you sure there is no confusion with IT sensors?

J. V.

No, it was AI bought from RC Dive. I had the same problem. But it was some years ago, perhaps it's better now...

__________________
--------------------
Jacques
NPSFQQA-EDS IT # 007
(remué non agité)

Tony Johnson

Two weeks ago one of my O2 cells just died ... Of course a couple of days before a weekend of diving in Hemmoor and no spares (Murphy's law ). So I had to find a quick solution for this -- I ended up using AI PSR-11-75D instead of Teledyne K-1Ds for my Sport KISS. They seem to react the same wrt. to response time, however the AI PSR-11-75D is about 4mm shorter (diameter is the same), but this gives no problem in the sensor housing.

But with just two weeks of diving using this sensor I am not able to share any long term experience.