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Old 08-12-2015, 01:23   #1
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Black water tank level indicator

I don't have a level indicator in my black water tank. I came across to gas bottle level indicator adverts such as Gaslevel and Truma, probably ultrasonic devices. I don't want to get into a sophisticated system. Does anyone have experience with these ? Any other simple solutions other than checking with a stick?
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Old 08-12-2015, 02:01   #2
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Re: Black water tank level indicator

Mine has an overflow pipe that comes back into the shower sump. It's pretty obvious when it's full

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Old 08-12-2015, 02:34   #3
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Re: Black water tank level indicator

I think the gas bottle level detectors use temperature sensitive crystals to show the temp. difference between a liquid and a gassy space. They might work. My tank is at waist to head level. I tap the side and get a fair idea if there's an empty space at the top.
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Old 08-12-2015, 04:37   #4
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Black water tank level indicator

I installed this;

http://www.bepmarine.com/en/ts1

Works very well and can be calibrated to any tank size. I use on my black water, diesel and water tanks. However you need to have this for output;

http://www.bepmarine.com/en/80-600-0022-00

Excellent for liquids info to the nearest 5 ltrs and battery monitoring with a shunt.


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Old 08-12-2015, 04:56   #5
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Re: Black water tank level indicator

I have a level indicator from Snake River Systems. There are 2 strips of aluminium glued on the outside of the plastic holding tank. It must be working by measuring the difference in capacitance of the 2 strips in function of the water level. Should be easy to install.
Below is front page of manual.
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Old 08-12-2015, 09:21   #6
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Re: Black water tank level indicator

I have a generic RV indicator system, shows level of fresh and black water tanks. Also has switch to run pump. It required drilling four holes into the side of each tank and putting the studs into the liquid, secured by rubber grommets/expansion plugs. Only works on plastic tanks. Only been in for half the summer, and tanks never more than quarter full. Hope it lasts long term.
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Old 08-12-2015, 09:30   #7
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Re: Black water tank level indicator

I have a device called tank tender, that allows measuring the level of any tank it is hooked up to by the air pressure to make bubbles in the bottom of the tank. It takes a small dip tube from the top or connection at or near the bottom.

Hart Systems - Home
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Old 08-12-2015, 09:48   #8
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Re: Black water tank level indicator

I installed a unit from Ferriello Home Page it works perfectly and didnt have to drill any holes in tank. no relation to company, just satisfied customer.
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Old 08-12-2015, 11:58   #9
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Re: Black water tank level indicator

Quote:
Originally Posted by jheldatksuedu View Post
I have a device called tank tender, that allows measuring the level of any tank it is hooked up to by the air pressure to make bubbles in the bottom of the tank. It takes a small dip tube from the top or connection at or near the bottom.

Hart Systems - Home
Here is two votes for Tank Tender. Basic, mechanical design that just keeps working. Easy install.
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Old 08-12-2015, 12:20   #10
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Black water tank level indicator

I am using a system made by "Sensa Tank" designed specifically for holding tanks. It works on non metal tanks only but it can measure up to 4 tanks. The bad news were that it took me quite a bit of fine tuning to get it to work right.
The problem was that the level sensors stuck outside the thank gave either on or off signals regardless of the fluid level.
Sensa tank tech support were full of good intentions but were clueless on how to solve the problem. I ended up using double sided tape until the sensors reached the right sensitivity level.


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Old 08-12-2015, 13:28   #11
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Re: Black water tank level indicator

Quote:
Originally Posted by DavefromNZ View Post
I installed this;

Ultrasonic Tank Sender | BEP

Works very well and can be calibrated to any tank size. I use on my black water, diesel and water tanks. However you need to have this for output;

DC Color Systems Monitor (DCSM) excluding Shunt | BEP

Excellent for liquids info to the nearest 5 ltrs and battery monitoring with a shunt.
How would that work with an odd shaped tank, say, a tank shaped to fit a catamaran keel. Wedge shaped bottom, taller at one end than the other? Does this bounce acoustics off the surface of the liquid and use time of flight to measure distance to that surface?
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Old 08-12-2015, 13:41   #12
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Re: Black water tank level indicator

Quote:
Originally Posted by ricktara View Post
I installed a unit from Ferriello Home Page it works perfectly and didnt have to drill any holes in tank. no relation to company, just satisfied customer.
Here's the installation instructions for the External Non-Contact
Fluid Level Sensor mentioned:
http://www.ferriellosales.com/upload...oil_Manual.pdf

I installed this monitor system on a new 20 gal plastic waste water tank two seasons ago and has worked well to date. Pretty straight forward/simple installation, assuming you can access any exterior wall of your tank. Nice thing is, no worry about fouled sensors inside the tank.
I have no experience with other systems, so really can't compare. Just saying this system was perfect for my situation and needs.
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Old 08-12-2015, 14:14   #13
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Re: Black water tank level indicator

What's wrong with a good old W EM a stainless steel sander and gauge? Just like the ones you use for your fuel and freshwater tanks.
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Old 08-12-2015, 14:37   #14
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Re: Black water tank level indicator

If it is a fiberglass tank, you would like the SCAD Solo tank monitor. It won't work on steel tanks.
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Old 08-12-2015, 15:04   #15
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Re: Black water tank level indicator

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Originally Posted by svfinlandia View Post
What's wrong with a good old W EM a stainless steel sender and gauge? Just like the ones you use for your fuel and freshwater tanks.
Sorry guys. The spell checker got me again!
That was meant to be "a good old "WEMA" sender".
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