Can propane gauge be installed inside?

I'm kind of puzzled here as to why no one has mentioned the float inside the tank that moves a magnet which moves the gauge, then sends the signal to the monitor panel inside the coach. It is measuring the propane in the liquid form before it escapes to the appliances, nothing to do with the pressure.Either way a gauge as mentioned before will work also. My 1/3, 2/3 and full is good enough for me.

Dutch_12078 wrote:
Kaven, in re-reading your initial post, I see one point that got by me. You mentioned you have the "1/3, 2/3..." display inside. In that case, you already have a sending unit on your tank gauge, and you only need to trace the wire to the existing panel and connect it to a new 0-90 ohm fuel gauge, 12-volt source, and ground. those can also be found at the existing panel. Just mount the new gauge near it to minimize the new wiring needed. My apologies for not noticing the oversight sooner.

Thanks again, Dutch. I will just tap into the existing wires in my panel. Have lots of room to put a gauge there. :-)

Kaven, in re-reading your initial post, I see one point that got by me. You mentioned you have the "1/3, 2/3..." display inside. In that case, you already have a sending unit on your tank gauge, and you only need to trace the wire to the existing panel and connect it to a new 0-90 ohm fuel gauge, 12-volt source, and ground. those can also be found at the existing panel. Just mount the new gauge near it to minimize the new wiring needed. My apologies for not noticing the oversight sooner.

My 2014 Thor Palazzo has a remote liquid level gauge. This means it can be done.

wa8yxm wrote:
Alas you are not going to like the answer I will give you but it can not be done.

The pressure in the tank does not change as the tank empties, it goes down very swiftly when the tank is empty, All but no warning, What you will see on a remote pressure gauge is more related to outside temperature than volume of propane in the tank.

We already sorted that out by the third post above. In the second post, I said, "Yes, it can be done. Note that you want to read the liquid level, not the gas pressure." (emphasis added)

Alas you are not going to like the answer I will give you but it can not be done.

The pressure in the tank does not change as the tank empties, it goes down very swiftly when the tank is empty, All but no warning, What you will see on a remote pressure gauge is more related to outside temperature than volume of propane in the tank.

It is possible to design a gauge that can be read remotely,, I could do it easily, takes basically two parts and a bit of support electronics, but the industry has not done so..

(If anyone has the ability to make gauges ask and I'll run off the basics for you, about 3 paragraphs)

The only way I know to do it given what is out today is a strain gauge on the tank mounts (weigh the tank) and .... I do not think that is practical for a Class A tank,, For class C and trailer tanks that sit on a floor it would work.

Thank you, Dutch!!

gsf35099 wrote:

Dutch_12078 wrote:
Yes, it can be done. Note that you want to read the liquid level, not the gas pressure. You would need to replace the gauge on the tank with one that includes a sending unit. One type is held in place with screws, and the other just snaps on. Which one you need depends on which type you currently have. The tank does not need to be empty to change the gauge since it's magnetically coupled to the float unit inside the tank. For inside the coach, the cheapest way to go would be an accessory fuel gauge from an auto parts place. The 0-90 ohm GMC style gauges work with the most common LP sending units. The GMC gauge will have wiring instructions with it. All that's needed is a 12-volt source, a ground, and a wire from the sending unit. The other wire on the sending unit can be grounded at the tank. A small switch can be added to turn the gauge on and off if desired. Amazon and/or eBay should have everything you need.

Thanks, Dutch.
This info is what I was looking for. The level. Wasn't sure if it was pressure or what, but figured someone would know.
Is it a kit I'm looking for or will I need to look for the LP sending unit & GMC gauge separately?

Here's a link to a kit with a screw in sending unit, but since only two pieces are needed plus some wire and crimp terminals or wire nuts, it's not hard to put together your own "kit", likely at a better price. You'll need to check your existing gauge first though to see if you need a screw-in or snap-on sending unit. If you don't see the tabs with screws in them, then it's a snap-on gauge. As long as the sending unit and gauge are both 0-90 ohms, they'll work together.

Dutch_12078 wrote:
Yes, it can be done. Note that you want to read the liquid level, not the gas pressure. You would need to replace the gauge on the tank with one that includes a sending unit. One type is held in place with screws, and the other just snaps on. Which one you need depends on which type you currently have. The tank does not need to be empty to change the gauge since it's magnetically coupled to the float unit inside the tank. For inside the coach, the cheapest way to go would be an accessory fuel gauge from an auto parts place. The 0-90 ohm GMC style gauges work with the most common LP sending units. The GMC gauge will have wiring instructions with it. All that's needed is a 12-volt source, a ground, and a wire from the sending unit. The other wire on the sending unit can be grounded at the tank. A small switch can be added to turn the gauge on and off if desired. Amazon and/or eBay should have everything you need.

Thanks, Dutch.
This info is what I was looking for. The level. Wasn't sure if it was pressure or what, but figured someone would know.
Is it a kit I'm looking for or will I need to look for the LP sending unit & GMC gauge separately?

Yes, it can be done. Note that you want to read the liquid level, not the gas pressure. You would need to replace the gauge on the tank with one that includes a sending unit. One type is held in place with screws, and the other just snaps on. Which one you need depends on which type you currently have. The tank does not need to be empty to change the gauge since it's magnetically coupled to the float unit inside the tank. For inside the coach, the cheapest way to go would be an accessory fuel gauge from an auto parts place. The 0-90 ohm GMC style gauges work with the most common LP sending units. The GMC gauge will have wiring instructions with it. All that's needed is a 12-volt source, a ground, and a wire from the sending unit. The other wire on the sending unit can be grounded at the tank. A small switch can be added to turn the gauge on and off if desired. Amazon and/or eBay should have everything you need.