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Leak Sentinel V4 and Vacuum Valves


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#21 Jock

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Posted 03 July 2017 - 10:00 AM

Maybe I need a new pair of glasses, but I cannot find any infos about the new vacuum pump on Miso's website; same for the price. 

 

Could someone help, please?

 

Jock


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#22 raphaelgatti

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Posted 22 July 2017 - 06:07 AM

Hi jock,
Just mail him, I did and got his reply in the same day. As the guys said, the costumer service is superb

#23 TimG

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Posted 22 July 2017 - 01:08 PM

As I've posted before, I think the Sentinel is terrific.

I do struggle though with the idea of an electric pump. What's the point? It only takes a dozen or so pumps with the hand pump, it's not hard - and why add electric pumps and a battery? Just more potential things to go wrong. Or am I being an old geezer and missing something?

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#24 TomekP

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Posted 10 September 2018 - 01:21 PM

 I have few questions.

Is it normal that with hand pump I need maybe 5-6 times to pump the housing? I read in manual that it should be something like 20 times. 

 

What will happen when the protective cap will got leak or I just forgot to install it ??? Is the red valve/membrane will keep vacuum/water sealing when it will got water pressure from outside?? 

 

How long this system can operate on one battery ?? I want to estimate how many batteries I need for 1 week trip with 3h diving per day. 



#25 pbalves

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Posted 10 September 2018 - 02:45 PM

Hi Tomek

Depending if the housing is empty or has the camera inside and also if it has the macro port or the big wideangle dome port attached, it will need different number of pumping to get the green light. It is physics. After getting the green light steady, pump once more (when the internal pressure is too close to the limit to turn orange, it might give you false alarms, as was said before on this or similar topic)

Never go diving without the protective cap. When ever you take out the pump, always put the protective cap before doing anything else to avoid to forget to put it.

Regarding the battery life, if you have one new battery, it should be enough for the full week of diving. But always have with you spare batteries (1 or 2). Sometimes the newbattery is not really new or fully charged or is faulty. And in that case you can save the rest of the dives. When the battery is low power, it might give you false alarms (also als states on some posts on the forum)

BR

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#26 okuma

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Posted 10 September 2018 - 07:47 PM

Miso advised new battery good for 100 hours.


Underwater Photography:
If it is so easy every one would be doing it!

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#27 TomekP

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Posted 11 September 2018 - 02:56 AM

Thank You Pedro for detailed answer. 

 

For the first time I did many strokes, and lamp was green/red changing. Then I checked again the system and after that it is just few times needed to get green. so I started to think what I really did ... most probably I fixed the small air leak :) 

This green light is really very healthfull for my mind :)  

 

I found only one mistake in my configuration. I have housing with two o-rings. So in the case when I pumped the system very well then it is difficult to open it. The vaccum which is created between the o-rings will keep the back door quite strongly :) 



#28 conger

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Posted 11 September 2018 - 04:42 AM

Being paranoid, I always hold the protective cap in the palm of one hand when I remove the cap for any reason.  It is marginally awkward to pump but it ensures that I replace the cap as soon as I am finished pressurizing the housing.



#29 okuma

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Posted 11 September 2018 - 09:50 PM

They can roll away very easy.

Buy a spare!


Underwater Photography:
If it is so easy every one would be doing it!

Nikon D 500, Subal Housing, Inon Z 240 strobes.


#30 Kraken de Mabini

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Posted 24 November 2018 - 07:50 AM

Reply to Great White (Okuma) above: 

 

My backup for the Leak Sentinel electric pump is one spare 9V battery, after two years no problem.  



#31 Kraken de Mabini

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Posted 24 November 2018 - 10:36 AM

I have used the Leak Sentinel electric vacuum pump for about 3 years, and no longer carry a hand pump, just a spare 9 V battery.

A spare cap for the Leak Sentinel is also an excellent idea.



#32 Kraken de Mabini

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Posted 24 November 2018 - 12:29 PM

  The Vivid Leak Sentinel V5 is now available in a shorty version, which fits nicely on my Nauticam NA500 housing, as does the standard size V5.  

  One can close the housing and pump a vacuum the night before, turn off the Sentinel to save the battery, turn it on in the morning and be ready to dive without worry.

  The Leak Sentinel can be used together with the built in Nauticam leak and vacuum detectors, or by itself.  I find the Nauticam light to be too big and bright; it can be masked partially with plastic tape, or not turned on. 

 

 

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#33 Kraken de Mabini

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Posted 25 November 2018 - 10:50 AM

 The Vivid Sentinel Vacuuum Leak Detector, version 5, is available in two versions, one with a short and one with a long body.  The short version has the battery in a separate unit lodged inside the housing, connected by a cord.  It fits nicely on my Nauticam, next to the viewfinder.  
 
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 The long version houses the battery in the body tube.  It also fits next to the viewfinder, where it is easy to monitor the vacuum status light.
 
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 As Sperm Whale mentions above, an added advantage to the Sentinel Vac Leak detector is that at the end of the day one can prepare and close the housing, pump a vacuum, turn off the Sentinel to save the battery, and turn it on the next morning to check the vacuum.   
 
 For the past two to three years I have used the electric Sentinel vacuum pump. A working vacuum  takes about 20 to 30 seconds of pumping. For backup I carry a spare 9V battery and also a second cap for the leak detector.  
 
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 Two notes:
 If the housing, such a Nauticam, has a built in vacuum detector, one can plug into it the Vivid Sentinel without the electronics or battery, just as a vacuum valve. 
For some divers a minor problem with this approach might be that the Nauticam's built in flashing light is a bit bright and distracting, while that of the Sentinel is subdued and less intrusive.
 
  And, should the battery of the vacuum detector die, the vacuum can still be tested by first pumping a vacuum and then, after some time passes, trying to open the housing by releasing a latch.  If the vacuum is good, the housing will remain sealed, and one can go diving.

Edited by Kraken de Mabini, 25 November 2018 - 10:51 AM.