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Old 04-02-2015, 09:20 AM   #11
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I used to use the screw in gas gauge, but it never worked.

I now have the Truma. It works very well. I can tell exactly where the propane level is in my tanks.

It is not the cheapest tool, but in this case it is well worth the money IMHO.
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Old 04-02-2015, 09:33 AM   #12
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Originally Posted by Cosmik Debris View Post
From what I've heard, a measure of tank pressure is not a good indicator of remaining propane.
Our local propane dealer tells me that they only true measure is by weight. That would be great if the tanks each sat on a scale in my 5er.
Cosmic is correct. When you get a tank filled, they go by weight, not volume (which is different at different temperatures). As far as I know, there is no way to determine the volume of a gas cylinder or tank by using a pressure gauge. The pressure is the same whether full or nearly empty. Just think about this - does your refrigerator, stove, water heater, etc operate any differently as the tank gets lower, by volume? No. Because the pressure is the same all the time until the tank is empty.

I've seen no gauges that would convince me otherwise.
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Old 04-02-2015, 10:03 AM   #13
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Originally Posted by Cosmik Debris View Post
From what I've heard, a measure of tank pressure is not a good indicator of remaining propane.
Our local propane dealer tells me that they only true measure is by weight. That would be great if the tanks each sat on a scale in my 5er.
I'm with Cosmik and Scout, the screw in gauge will tell you there is "some" or "none" in the tank. It measures the pressure in the tank not the amount of liquid. The pressure will be constant until there is no (or very little) liquid in the tank. Do a Google search on "vapor pressure" for the details.

My local propane shop sells a mechanical gauge, has a float extending from the valve into the tank. A magnetic gauge clips to the tank valve and reads the position of the float from a linkage in the valve.
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Old 04-02-2015, 10:50 AM   #14
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I use the hot water method. Pour hot water over the side of the tank. The hot water will heat up the tank wall ABOVE the LPG a level in the tank. Run your hand done the side of the tank. It will be noticeably warmer above the LPG level in tank and noticeably colder when you reach the level of the LPG. Keep in mind a full tank is only going to be 80% of the total tank volume.

Works pretty well for me and is essentially free.

Dennis
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Old 04-02-2015, 05:31 PM   #15
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Apparently DOMETIC is not yet offering the Truma product in the US, but it is available on the Truma LevelCheck or the TRUMA sites. Amazon offers a MosCap product. It is probably only a matter of time before it is sold through Amazon ...
Here it is on Amazon.
http://www.amazon.com/Dometic-LPGC10...productDetails
On the Truma site they show their gas check as available at my local rv dealership and when I first saw one there it was the Dometic. From these two pieces of info I'm assuming then that the dometic is made by truma and sold under both names.
The little internal watch batteries are replaceable and truma claims 2000 uses per set.
I wonder if these could also be used on holding tanks.....
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Old 04-02-2015, 05:53 PM   #16
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I wonder if these could also be used on holding tanks.....
Interesting thought. I doubt it though. The following is stated on their website:

"For all steel and aluminium LP gas tanks with a diameter of 7.9 to 13.8 in"

Fill level indicator Truma LevelCheck

I suppose the new "see through" propane tanks would not work with the Truma device. Of course you would just be able to see the propane level on those types of tanks.
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