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Old 05-27-2014, 04:16 PM   #1
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Tank Monitor

Anyone have advice one a good water tank monitor. I installed a BlueSeas VSM a year ago and the tank monitoring has never worked. The readings are all over the map. I've tried everything BlueSeas has suggested with no luck. I'm now thinking of going with a Hart Tank Tender. There is only about six inch clearance above my tanks so I limited on my choices of products.
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Old 05-27-2014, 04:31 PM   #2
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Tank Tender by Hart Systems. We installed ours 7 years ago with zero issues. Calibration was a 5 gallon bucket.
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Old 05-27-2014, 07:10 PM   #3
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I have the same issue. One minute it reads full, which I know it's not. Than in a few moments it reads about where I think it should be and everywhere in between.
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Old 05-27-2014, 07:13 PM   #4
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Forget any kind of level gauge.

The Watercounter. Tells you exactly what you are using and what you have left. Allows you to manage your water supply precisely. One of the very best upgrades I made to the boat, if not THE best, and I made plenty!

The World's Best Potable Water Management System For Boats and Rv's | WaterCounter
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Old 05-28-2014, 04:51 AM   #5
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Tank Tender - they are great. Multiple tanks from the one unit. Easy to just turn the knob and check all tanks from the one spot. I use it for 6 fuel tanks, 2 water tanks and a black water tank, and have one spare position that is unused.

With tanks that taper to follow the hull the trick is to calibrate it by starting with an empty tank, add a known amount of fuel or water and read the tank tender gauge. You can plot a graph for the tanks or just have a table of inches/mm = x gal/litres.
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Old 05-28-2014, 10:24 AM   #6
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Arcticspud, did you ever get your VSM working correctly? I hate to just give up on something I've spent so much time and money on. But, it looks like the Tank Tender is the way for me to go.
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Old 05-28-2014, 11:00 AM   #7
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Not yet. It seems to average the quantity which is what it is not supposed to do. I am going to drain the tank and recalibrate the system to see if that works.
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Old 05-28-2014, 11:15 AM   #8
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Curious why you'd go with a Tank Tender for water only.
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Old 05-28-2014, 11:26 AM   #9
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And the rest of the story. The PO also owned Blue Sea. He redid the entire boat with Blue Sea. I spent last year doing several other boat projects and lived with a water quantity. She has 113 gallon water tank so it held up pretty well for us.

I looked at the quantity indicator about a month ago and discovered it wasn't hooked up to power or the main monitor panel. It works but in my haste, because of a boat trip, I didn't calibrate it correctly. It was showing about 20% full when the tank was empty. So the error maybe self induced.

What is the computer saying...GIGO. garbage in, garbage out.
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Old 05-28-2014, 03:46 PM   #10
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Originally Posted by caltexflanc View Post
Forget any kind of level gauge.

The Watercounter. Tells you exactly what you are using and what you have left. Allows you to manage your water supply precisely. One of the very best upgrades I made to the boat, if not THE best, and I made plenty!

The World's Best Potable Water Management System For Boats and Rv's | WaterCounter
I like this one! I assume all you do is reset it when you fill the tanks back up?
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Old 05-28-2014, 04:00 PM   #11
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I like this one! I assume all you do is reset it when you fill the tanks back up?
That's right. Loved ours.
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Old 05-28-2014, 08:46 PM   #12
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Tank Tender - they are great. Multiple tanks from the one unit. Easy to just turn the knob and check all tanks from the one spot. I use it for 6 fuel tanks, 2 water tanks and a black water tank, and have one spare position that is unused.

With tanks that taper to follow the hull the trick is to calibrate it by starting with an empty tank, add a known amount of fuel or water and read the tank tender gauge. You can plot a graph for the tanks or just have a table of inches/mm = x gal/litres.
Coot's tank tender monitors four fuel tanks and two water tanks.

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Old 05-28-2014, 09:16 PM   #13
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The Watercounter. Tells you exactly what you are using and what you have left.
Not if you have a leak in your tank, or anywhere before the sender.
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Old 05-29-2014, 06:53 AM   #14
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Not if you have a leak in your tank, or anywhere before the sender.
Good point. In my case I left the old, semi-accurate on-tank gauge on. I also took good care of my plumbing and inspected my boat on a regular basis and maintain it to a high standard. Another thing is, if I were to run out of water unexpectedly, before the Watercounter indicated I should, I would know there was a leak, rather than guessing.

The biggest nicety, IMO, about the WaterCounter is its measurement of usage; thus we learned how much various lengths of shower took, or different cycles on the laundry and dishwasher, even toilet flushes after conducting a test (since one flush is not enough to trigger the pressure switch). Like having FloScans for your water. Since we lived full time on moorings for several months a year, and prefer to anchor out when cruising, it became a very valuable tool. For weekend warriors or dock-to-dock cruisers, probably less of a tool and more of a "nice to have".

The boat has a "tank tender" up near the helm where you can switch between the two fuel tanks and water. Water had obviously not been calibrated or set up right, fuel read a little lower than actual, which was ok with me (on-tank gauges were very accurate). A multi purpose tank tender in one location is convenient, but without easy to access on-tank gauges becomes a single point of failure. And obviously, with irregular shaped tanks needs a whole calibration and cross reference process.
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Old 05-29-2014, 07:42 AM   #15
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Then there is the stick the tank method.
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Old 05-31-2014, 08:33 AM   #16
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You mat want to try Wema Guages. Very reliable and reasonably priced. They also have a good tech department. They have a facility in Ft Lauderdale.


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Old 05-31-2014, 10:26 AM   #17
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http://www.ferriellosales.com/upload...e_Aug_2006.pdf

http://www.ferriellosales.com/Monitoring_Systems.html
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Old 05-31-2014, 11:00 AM   #18
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Glad to see he's still in business, Bill is a good guy, great service. I got one of his holding tank monitors, what, 7 years ago. Still, I like something more precise for water for the style of boating we do.
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Old 05-31-2014, 11:26 AM   #19
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Glad to see he's still in business, Bill is a good guy, great service. I got one of his holding tank monitors, what, 7 years ago. Still, I like something more precise for water for the style of boating we do.
I think you mean Dennis. Contact Page

Dennis provides great personal service and support.
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Old 05-31-2014, 11:45 AM   #20
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Yeah, I don't know why I keep calling him Bill. Whatever his name, he is a good guy to do biz with!
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