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Old 09-11-2019, 07:58 PM   #1
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Tank level system sensors

I am having problems with the tank level sensors not reading correctly especially the black and grey water tanks. These tanks are hard to access and looks like the sensors are external and may be taped to the tanks. I cannot find any info as to the manufacturer of these sensors or the indication panel. Any info on the tank level system would be appreciated.


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Paul
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Old 09-11-2019, 08:23 PM   #2
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I have Seelevel tank monitoring system that uses sensors that are taped to the outside of the tank, maybe thats what you have.https://www.garnetinstruments.com/wp...System-web.png
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Old 09-12-2019, 10:15 AM   #3
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I don't remember who made the sensors that came with the coach. They were applied to the tank with adhesive, and rather poorly at that. Mine were falling off. I replaced mine with SeeLevel gauges, and have been happy ever since. For one thing, you get much more resolution with the tank level changing in 3-4% increments instead of the 25% increments. When the 1/4 full light went off on the fresh water tank, you know you had somewhere between 25 gallons (mine is a 100 gallon tank making the math easy) and 0 gallons. BIG difference between having 0 and 25 gallons if dry camping. SeeLevel fills that gap with more readings.

The old sensors have 3 wires each. The SeeLevel sensors have two wires each. WRV used what appeared to be 9 conductor sprinkler system wire cable to wire the sensors. Easy to reuse.

The sensors on the grey and black tank are mounted behind the panel in the service bay. Not easy to get to, but doable. However, the other side of the tank compartment has a door that is screwed shut. If you open that side up, you have easy access to the other sides of the tanks. I wish I had known that when I replaced my sensors!
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Old 09-12-2019, 10:18 AM   #4
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P.S. You can find the installation manuals for the SeeLevel gauges online, so you can see what it takes to do the installation.
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Old 09-12-2019, 11:31 AM   #5
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Quote:
Originally Posted by Jim A View Post
I don't remember who made the sensors that came with the coach. They were applied to the tank with adhesive, and rather poorly at that. Mine were falling off. I replaced mine with SeeLevel gauges, and have been happy ever since. For one thing, you get much more resolution with the tank level changing in 3-4% increments instead of the 25% increments. When the 1/4 full light went off on the fresh water tank, you know you had somewhere between 25 gallons (mine is a 100 gallon tank making the math easy) and 0 gallons. BIG difference between having 0 and 25 gallons if dry camping. SeeLevel fills that gap with more readings.

The old sensors have 3 wires each. The SeeLevel sensors have two wires each. WRV used what appeared to be 9 conductor sprinkler system wire cable to wire the sensors. Easy to reuse.

The sensors on the grey and black tank are mounted behind the panel in the service bay. Not easy to get to, but doable. However, the other side of the tank compartment has a door that is screwed shut. If you open that side up, you have easy access to the other sides of the tanks. I wish I had known that when I replaced my sensors!
Hey Jim How difficult was the install?

Access to the tanks for gauge application?
Were you able to use the existing wiring or did you need to run new wires to the display?
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Old 09-12-2019, 04:11 PM   #6
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Originally Posted by paul65k View Post
Hey Jim How difficult was the install?

Access to the tanks for gauge application?
Were you able to use the existing wiring or did you need to run new wires to the display?
Paul,

I did the 709 install over 10 years ago, so all of the bad things are blocked out of my memory! Only the joys of using the monitor remain.

Access to the fresh water tank is easy. The grey and black tanks are behind the panel. Not a lot of room to work, but not impossible. If you look in there you will see the old gauge strips. The biggest problem was removing the adhesive residue from the tank. Putting the new sensors on was pretty easy. It seems to me that the wiring connections were pretty easy to get to, except for the mile of electrical tape used on each sensor.

But like I said above, I would work on the other side and just leave the old ones in place. Just cut the wires and splice them to a new cable going to the other side. Wide open space to work on the other side, and easy to run wires across to the connection points. You can see the connections behind the panel when you remove it.

I used the existing wiring. All of the wires terminate at the back of the existing gauge. Easy to get to when you remove the gauge. I have a WRV wiring diagram with all the color codes and the Larsen (that name was hand written on the diagram) panel wiring.
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Old 09-12-2019, 07:50 PM   #7
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After 13 years of fulltiming in the coach, I pretty much know what the level is by when we last dumped. Our black tank is good for 12-16 days (depending upon how much running around we are doing) and grey, depends upon what's going on. If at park with no sewer at site, then we go into 'navy' shower mode and do laundry in the laundromat and we are good for 12 days on the grey. The black tank lets me know when it is time - that "burp" is the signal that we've only got a couple of days left.
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Old 09-12-2019, 08:51 PM   #8
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Seelevel will be installed!

Thanks for all the replies and glad I am not the only one that thinks the original level system is junk! I looked up the Seelevel system and was impressed with the product and the installation. I did take a look inside the bays at the tanks and agree that the fresh water is easy but will need to find a very small thin person to get the black and grey tanks done! I am neither small or thin! Ha!


Thanks Again
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Old 09-13-2019, 11:43 AM   #9
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Quote:
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Paul,

I did the 709 install over 10 years ago, so all of the bad things are blocked out of my memory! Only the joys of using the monitor remain.

Access to the fresh water tank is easy. The grey and black tanks are behind the panel. Not a lot of room to work, but not impossible. If you look in there you will see the old gauge strips. The biggest problem was removing the adhesive residue from the tank. Putting the new sensors on was pretty easy. It seems to me that the wiring connections were pretty easy to get to, except for the mile of electrical tape used on each sensor.

But like I said above, I would work on the other side and just leave the old ones in place. Just cut the wires and splice them to a new cable going to the other side. Wide open space to work on the other side, and easy to run wires across to the connection points. You can see the connections behind the panel when you remove it.

I used the existing wiring. All of the wires terminate at the back of the existing gauge. Easy to get to when you remove the gauge. I have a WRV wiring diagram with all the color codes and the Larsen (that name was hand written on the diagram) panel wiring.
Thanks Jim....very Helpful!!
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