Analytical Industries Sensors outperform Teledyne in six-year study

n2diving · 30th March 2007, 19:23

Yep, I've heard the story that the lower end of the range last longer/more stable as well and I got it from Teledyne when I was fussing at them about the low mv outputs I was seeing, but I've never seen any evidence of it or as you point out, an explanation of why.. and frankly from my experience with the Teledynes, where I saw plenty of low (really low!) mv output ones that were not any more stable than others.. I'm suspicious of the source. If you replace the things every 12 to 18 months, I'm not sure 'longer life' in a 36 month cell is significant, and what does 'more stable' mean exactly? The low mv output cells are 'more stable' how or are the 10mv sensors 'unstable'?

***schford*** · 31st March 2007, 12:36

To build on what Dave said I have observed that on my cells the ones that read a little lower seem to last longer.

**trob09** · 31st March 2007, 17:00

I think it's a reasonable deduction that the higher the mv is in air, the more fuel is being 'consumed'. The higher the consumption rate, the shorter a fuel supply will last. So, given 2 cells, 1 with a 8.5mv output in air and one with a 13mv output in air, the 8.5 one should last longer...

drbeddow · 31st March 2007, 23:26

How long is the 15% discount in effect for?

teksimple · 31st March 2007, 23:44

Quote: (Originally Posted by drbeddow)

How long is the 15% discount in effect for?

To receive the 15% off, you need to purchase within the next 6 days. If you do not purchase before then, you can still receive a 10% discount coupon good for a year, just by registering for a new account on CCRsense.com.

Mark Gregus · 4th April 2007, 18:37

Hi Guys,

Here is the answer to your question about Mv ouput to life and stability.

The Mv output has nothing to do with the life of the sensor. When a sensor is manufactured it has a Ua output or "current output", this output does directly affect the life of the sensor. The lower the output the longer the life, the higher the output the shorter the life. We place a temperature circut on each sensor. This circut changes the Ua output to the desired Mv range.

As far as the stability goes, an unstable sensor is usually caused by the manufacturing process.

If anyone has questions regarding Oxygen sensors please don't hesitate to drop me a line EMAIL: gregusm@aii1.com

Best Regards,

Mark Gregus
Diving Sales Manager
Analytical Industries Inc.

n2diving · 5th April 2007, 00:04

Quote: (Originally Posted by Mark Gregus)

Here is the answer to your question about Mv ouput to life and stability. The Mv output has nothing to do with the life of the sensor. As far as the stability goes, an unstable sensor is usually caused by the manufacturing process.

Thanks!

teksimple · 5th April 2007, 04:37

Quote: (Originally Posted by Mark Gregus)

Hi Guys...

Yes, thanks, Mark. You said a bunch of stuff on the phone that may have come out differently by the time it was processed by the device between the keyboard and chair. I have had a number of questions from Meg owners regarding the difference between MHD and MD, and what the real effect would be. No answer from Leon at ISC yet, on those questions. I do not currently stock MHD's since I thought the difference was negligible. So you are saying that the circuit (resistor I take it) is different as well between the MD and MHD sensors? What you told me was that there was no difference between the MHD and MD other than the slight "resting" voltage in air. Can you confirm the real world effect on performance between these two sensors with regard to the Megalodon rebreather?

rdmmdr · 5th April 2007, 05:45

i am currently testing ai and teledynes r17 sensor. six months into to testing. one ai failed replaced with teledyne currently in service, ai replacement put in its place. wanted to make sure the channel did not blow it. have exposed the sensors to high natural gas concentrations and high temps 175 F. and high oiley enviroments. have not found a significant difference between the sensors. except for the fact that the ai are a little more acurate in the .6 to.8 ppo2 range. yet not good enough to justify the change. at this point i would use both, interchangably.

rick

teksimple · 5th April 2007, 23:50

Quote: (Originally Posted by teksimple)

Yes, thanks, Mark. You said...

OK, confirmed what I originally thought. No difference between MD and MHD other than the minimum asserted voltage. So there may not be an ACTUAL difference when comparing any two cells.

30th March 2007, 19:23	#21 (permalink)
n2diving Custom Title Allowed! Current Rebreather/s: Optima Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Feb 2005 Location: Florida, USA Posts: 272	Re: Analytical Industries Sensors outperform Teledyne in six-year study Yep, I've heard the story that the lower end of the range last longer/more stable as well and I got it from Teledyne when I was fussing at them about the low mv outputs I was seeing, but I've never seen any evidence of it or as you point out, an explanation of why.. and frankly from my experience with the Teledynes, where I saw plenty of low (really low!) mv output ones that were not any more stable than others.. I'm suspicious of the source. If you replace the things every 12 to 18 months, I'm not sure 'longer life' in a 36 month cell is significant, and what does 'more stable' mean exactly? The low mv output cells are 'more stable' how or are the 10mv sensors 'unstable'? Last edited by n2diving : 30th March 2007 at 22:45.
(Offline)

31st March 2007, 12:36	#22 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,562	Re: Analytical Industries Sensors outperform Teledyne in six-year study To build on what Dave said I have observed that on my cells the ones that read a little lower seem to last longer. __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use
(Offline)

31st March 2007, 17:00	#23 (permalink)
trob09 . Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2005 Posts: 699	Re: Analytical Industries Sensors outperform Teledyne in six-year study I think it's a reasonable deduction that the higher the mv is in air, the more fuel is being 'consumed'. The higher the consumption rate, the shorter a fuel supply will last. So, given 2 cells, 1 with a 8.5mv output in air and one with a 13mv output in air, the 8.5 one should last longer...
(Offline)

31st March 2007, 23:26	#24 (permalink)
drbeddow New Member Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Sep 2006 Location: Oregon, USA Posts: 33	Re: Analytical Industries Sensors outperform Teledyne in six-year study How long is the 15% discount in effect for?
(Offline)

31st March 2007, 23:44	#25 (permalink)
teksimple Enlightened Alpinist Current Rebreather/s: MK 15.X Other Rebreather/s: Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Back in Hawaii Posts: 503	Re: Analytical Industries Sensors outperform Teledyne in six-year study Quote: (Originally Posted by drbeddow) How long is the 15% discount in effect for? To receive the 15% off, you need to purchase within the next 6 days. If you do not purchase before then, you can still receive a 10% discount coupon good for a year, just by registering for a new account on CCRsense.com. __________________ ---- _____________ "I don't know the percentage of the Internet that's valid, do you? Jesus, it's scary." - Hunter S. Thompson
(Online)

4th April 2007, 18:37	#26 (permalink)
Mark Gregus New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Jun 2006 Location: California, USA Posts: 4	Re: Analytical Industries Sensors outperform Teledyne in six-year study Hi Guys, Here is the answer to your question about Mv ouput to life and stability. The Mv output has nothing to do with the life of the sensor. When a sensor is manufactured it has a Ua output or "current output", this output does directly affect the life of the sensor. The lower the output the longer the life, the higher the output the shorter the life. We place a temperature circut on each sensor. This circut changes the Ua output to the desired Mv range. As far as the stability goes, an unstable sensor is usually caused by the manufacturing process. If anyone has questions regarding Oxygen sensors please don't hesitate to drop me a line EMAIL: gregusm@aii1.com Best Regards, Mark Gregus Diving Sales Manager Analytical Industries Inc. __________________ Mark Gregus Diving Sales Manager Analytical Industries Inc. 909 392 6900 email: gregusm@aii1.com
(Offline)

5th April 2007, 00:04	#27 (permalink)
n2diving Custom Title Allowed! Current Rebreather/s: Optima Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Feb 2005 Location: Florida, USA Posts: 272	Re: Analytical Industries Sensors outperform Teledyne in six-year study Quote: (Originally Posted by Mark Gregus) Here is the answer to your question about Mv ouput to life and stability. The Mv output has nothing to do with the life of the sensor. As far as the stability goes, an unstable sensor is usually caused by the manufacturing process. Thanks!
(Offline)

5th April 2007, 04:37	#28 (permalink)
teksimple Enlightened Alpinist Current Rebreather/s: MK 15.X Other Rebreather/s: Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Back in Hawaii Posts: 503	Re: Analytical Industries Sensors outperform Teledyne in six-year study Quote: (Originally Posted by Mark Gregus) Hi Guys... Yes, thanks, Mark. You said a bunch of stuff on the phone that may have come out differently by the time it was processed by the device between the keyboard and chair. I have had a number of questions from Meg owners regarding the difference between MHD and MD, and what the real effect would be. No answer from Leon at ISC yet, on those questions. I do not currently stock MHD's since I thought the difference was negligible. So you are saying that the circuit (resistor I take it) is different as well between the MD and MHD sensors? What you told me was that there was no difference between the MHD and MD other than the slight "resting" voltage in air. Can you confirm the real world effect on performance between these two sensors with regard to the Megalodon rebreather? __________________ ---- _____________ "I don't know the percentage of the Internet that's valid, do you? Jesus, it's scary." - Hunter S. Thompson
(Online)

5th April 2007, 05:45	#29 (permalink)
rdmmdr designer of death Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Mar 2006 Location: kerman,california Posts: 372	Re: Analytical Industries Sensors outperform Teledyne in six-year study i am currently testing ai and teledynes r17 sensor. six months into to testing. one ai failed replaced with teledyne currently in service, ai replacement put in its place. wanted to make sure the channel did not blow it. have exposed the sensors to high natural gas concentrations and high temps 175 F. and high oiley enviroments. have not found a significant difference between the sensors. except for the fact that the ai are a little more acurate in the .6 to.8 ppo2 range. yet not good enough to justify the change. at this point i would use both, interchangably. rick
(Offline)

5th April 2007, 23:50	#30 (permalink)
teksimple Enlightened Alpinist Current Rebreather/s: MK 15.X Other Rebreather/s: Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Back in Hawaii Posts: 503	Re: Analytical Industries Sensors outperform Teledyne in six-year study Quote: (Originally Posted by teksimple) Yes, thanks, Mark. You said... OK, confirmed what I originally thought. No difference between MD and MHD other than the minimum asserted voltage. So there may not be an ACTUAL difference when comparing any two cells. __________________ ---- _____________ "I don't know the percentage of the Internet that's valid, do you? Jesus, it's scary." - Hunter S. Thompson
(Online)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode