See Level II sensors

[jsadler]

Those that have installed this system did you need 2 sensors/tank if the sensor is positioned at the deepest point of the tank(s).

Thanks

[l1v3fr33ord1]

F&J-

If the tank is taller than the sensor, and you use one sensor positioned with its lowest segment at the bottom of the tank, then when the readout says "100%" the tank may not be full.

I've heard of people using this strategy for their fresh water tank, where the aim is not to run out of fresh water. For the grey and black water tanks, where the aim may be to see how long one can go before emptying (e.g., for boondocking), the strategy makes a little less sense.

The price of the sender board is between $50 and $60, so adding another is not too expensive.

Remember, too, there is a minimum sender length of something like two segments, so not much you can do if the tank height is just a few inches more than the full sender length.

I installed the SeeLevel II system on our former coach. For the fresh water tank, I didn't have enough room to add a second sender, so the tank read "100%" when it was actually closer to 85% full. For the grey tank, which was shallow, I used the "Junior" board. Its segments are shorter than the standard sender. I used the standard sender for the black tank. When completed, I had the senders coated with 3M 08883 undercoating spray.

[jsadler]

Hi Mark

I did something similar when I installed the system on my last rig. But on this one I'm hoping to have the sensor the full height if possible. I'm trying to get all of the pieces in one order, but I may have to order the extra sensors separately.

Thanks for the info.

J Sadler

[slabman]

Can you install the fresh water sender positioned at the bottom? Then the black and grey tank sensors at the top?

[l1v3fr33ord1]

slabman-

You can install the senders at any elevation on the tanks, with some allowance for top and bottom wall thicknesses.

For a tank with a sloped bottom sheet, there may be a practical limit as to where you position a sender. What that usually means is the grey and black tanks have some contents in them even though the readout shows empty.

If the senders do not cover the entire range of tank levels (e.g., you adjust fresh, grey and black tank senders as you suggest), you need to mentally account for the differences between the readout values and the actual tank ullages. It's probably worth a notes page in your coach owner's manual, so the next owner doesn't need to find out for himself.

[slabman]

Understood, Mark. That's why you'd want to install them as I suggest. Not that important if there's 5 or 10 gals in the gray before you begin to show tank contents. MUCH more important as you near the top of that tank.

[jsadler]

Originally Posted by slabman

Understood, Mark. That's why you'd want to install them as I suggest. Not that important if there's 5 or 10 gals in the gray before you begin to show tank contents. MUCH more important as you near the top of that tank.

Which is why I'd like to know how tall the deepest part of the tanks are & if they're accessible. If it's only a couple of gallons, I'll do as I've done before gray & black towards the top and fresh towards the bottom.

I was hoping to get the info from someone who has done it on a Newmar so I could order everything at once if I needed the extra sensors.

J Sadler

[Possum]

Whewn I installed the system on my old C Class I had a deep black water tank and had to cut and stack the units to get a proper empty to full readout. See this link and it shows how you can properly read all tanks from 5" to 25" accurately.

https://www.garnetinstruments.com/rv-shop/

On the above page scroll to the visual of the RV and then click on it to read that document.

[andyh]

If you are buying a Dutch Star Ventana or Ventana LE and the 709 system you need one sensor per tank. I am not familiar with the gas coaches tank arrangements.


Sent from my iPhone using iRV2 - RV Forum

[jsadler]

Thanks all. I've placed the order on Amazon. I'll let you know how it goes.

J Sadler