Thread Tools Search this Thread Display Modes
Old 01-01-2015, 08:05 PM   #1
4 Rivet Member
trekerboy's Avatar
1979 31' Excella 500
Charlevoix , Michigan
Join Date: Aug 2014
Posts: 340
LPG Sensor - Which to use with SeeLevel 2 System?

This is a cross-post with a topic I started in a different forum, but since it's sort of bridges that gap between Electrical and "LP Gas, Piping, Tanks & Regulators" topics I thought I'd post here too and let the moderators move or delete it if it's not appropriately categorized...

We're using the SeeLevel 2 Tank Monitoring system ( See LeveL Tank Monitor 709: Automotive) which has the ability to display the remaining level of propane in percent. Our Excella has 2 x 40lb propane tanks connected by a regulator which supplies fuel to all the gas-operated things in the camper.

With all that being said, my question is this: what do I need to be able to monitor the propane tank levels using the SeeLevel 2 panel? Is there supposed to be a sensor on each propane tank? Or is there supposed to be a sensor on the regulator to report the percent full? I see neither in my current setup, so I'll need to buy something to make this work, just not sure what.

1. Do I need something like this Manchester Sender Unit? If so, when one tank is empty and I switch to the other, how would the SeeLevel system know to begin monitoring the 2nd tank? Would I have to manually switch the sensor cable from one to another?

2. Or maybe I need a sensor built into the regulator; something like this? Propane Regulator Valves on Sale - PPL Motor Homes. I don't think this exact unit would work for my application since the "sensor" they mention sounds like it's just a light on top of the device itself.

Any advice, or pictures of your setup (with remote level monitoring) would be appreciated, thank you!

trekerboy is offline   Reply With Quote
Old 01-01-2015, 10:39 PM   #2
2020 Classic 33 on order
Box Elder , South Dakota
Join Date: Oct 2013
Posts: 1,519
Images: 1
The only tanks that I have seen that have the sensors are on the the 2015 Classic. The 40 gal aluminum tanks have a tank level indicator with a sensor mounted on the face. It looks like the Manchester that you show. New AS's use steel tanks which don't usually have the port for a tank gauge. Vintage Trailer sells aluminum tanks with the option of having the gauge at an additional charge.

Might be a good question for See Level.

Here's a link to a shot of the 2015 Classic tanks.

2020 Classic 33 Twin, 2019 Ram 3500 Longhorn, ProPride
ghaynes755 is offline   Reply With Quote
Old 01-02-2015, 12:00 AM   #3
Rivet Master
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
In the 70's and 80's it was fairly common for the high end aluminum tank Airstreams to have a propane level indicator built into the tank valve. It had a separate float which operated a lever which turned a magnet on one side of an aluminum separation element. On the other side was either a gauge or a sensor element driven by the magnet. This allowed monitoring without any tank opening.

When the new stile OPD valves were mandated in the 90's unfortunately none were made with the float/magnet/sensor built in. So, anyone with the old single bung tanks was out of luck and had to abandon the gage system, be it dial or electronic.

Newer aluminum tanks such as those shown in the link to the photo above are now available with two bungs, one for the valve, one for the gage/sensor. You can get a gage/sensor as a separate item but must have a 2 bung tank to use it.

There is no new single bung OPD valve and gage sensor unit. None, nada.

So, you cannot have a working electronic gage system anymore unless you are willing to buy new 2 bung tanks and sensors. I would guess the cost of a new pair of tanks and sensors would push $1000 but maybe cheaper, I have never looked.
idroba is offline   Reply With Quote
Old 01-02-2015, 05:28 AM   #4
Rivet Master
Bruce B's Avatar
2012 16' International
Jamestown , Rhode Island
Join Date: Mar 2012
Posts: 1,482
Images: 1
Vintage Trailer Supply has what you need. I too swapped out my useless CatCon system for a SeeLevel system a couple of years ago and ended up with the propane level indicator. The rub for our size trailer was that the 20 lb tanks are not made with gauges so I simply went up to 30 lb tanks and threw away the propane bottle cover. Then I polished the tanks...
My 30 lb tanks were less than $300 each with the gauges I needed for hooking up to the SeeLevel.
Bruce B is offline   Reply With Quote
Old 01-02-2015, 07:59 PM   #5
4 Rivet Member
trekerboy's Avatar
1979 31' Excella 500
Charlevoix , Michigan
Join Date: Aug 2014
Posts: 340
Thanks for the replies everyone. After lots of research and talking to a few different professionals in this sphere, I've confirmed that you can NOT add these types of propane level gauges (also known as "sender units") to tanks that don't already have them installed. The gauges are built into the tanks during the manufacturing process.

Looks like my only option is to ditch my existing, gauge-less tanks and order the units from Vintage Trailer Supply:

40 Lb. (9.4 Gallon) Vertical Aluminum LP Tank
trekerboy is offline   Reply With Quote
Old 01-02-2015, 10:58 PM   #6
"Space A" S/O Registry 11
2006 34' Classic S/O
Fort Worth , Texas
Join Date: Feb 2007
Posts: 946
I just purchased new electrical sender/gauges at Airstream. I have Wothington 40# tanks. IIRC the electrical senders are 90 ohms full-scale.
Also, I have bought them in the past from Propane parts suppliers. Maybe there are some still in inventory if they are no longer available from Worthington.

guskmg is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Propane Regulator - Which to use with SeeLevel 2 System? trekerboy LP Gas, Piping, Tanks & Regulators 0 01-01-2015 01:26 AM
Tank side wall height for SeeLevel Sensors? mtntime Plumbing - Systems & Fixtures 1 06-15-2012 11:26 AM
SeeLevel II display not working johnandlauri General Repair Forum 0 09-17-2010 09:09 AM
Seelevel Monitoring Systems rickandsandi Waste Systems, Tanks & Totes 3 10-13-2009 08:48 AM
SeeLevel Gauges 68 Overlander Commercial Listings 11 07-11-2007 12:12 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:45 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.