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Old 07-07-2006, 06:37 AM   #15
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Propane Level

The easiest and cheapest way to determine how much liquid is left in a tank is to pour luke warm water down the side of the tank, you will see a visable level of condensation form at the point of liquid level in the tank, and this method cost nothing.

Zoom
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Old 07-07-2006, 09:48 AM   #16
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Quote:
Originally Posted by ZoomZoom
The easiest and cheapest way to determine how much liquid is left in a tank is to pour luke warm water down the side of the tank, you will see a visable level of condensation form at the point of liquid level in the tank, and this method cost nothing.

Zoom
Do you need to have a heavy using gas appliance operating at the time?
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Old 07-07-2006, 11:47 AM   #17
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Quote:
Originally Posted by Minnie's Mate
Do you need to have a heavy using gas appliance operating at the time?
It probably helps a lot. If there is relatively little gas usage occuring, and your outside temperature is fairly equivalent to the propane then that method may not give you the results you are looking for.

Sometimes you can also see that level when on a damp morning, you have a rapid increase in outdoor temperatures. In some cases the liquid propane will be slower to warm and therefore the liquid level forms condensation around the tank.

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Old 07-07-2006, 12:33 PM   #18
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It probably helps a lot. If there is relatively little gas usage occuring, and your outside temperature is fairly equivalent to the propane then that method may not give you the results you are looking for.

Sometimes you can also see that level when on a damp morning, you have a rapid increase in outdoor temperatures. In some cases the liquid propane will be slower to warm and therefore the liquid level forms condensation around the tank.

Jack
Is that why you use luke warm water?
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Old 07-07-2006, 12:39 PM   #19
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I saw something that may point towards the future on TV over the weekend. They were doing a piece on "CLEAR" propane tanks for outdoor grills. They were clear enough to see the level inside. Who knows, maybe it will make it to RV's. I could see a possibility for polycarbonate tanks. Anyone know what the pressure is inside a full propane tank?
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Old 07-07-2006, 01:22 PM   #20
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Is that why you use luke warm water?
Yes. What you are trying to do is reproduce what happens when a cold glass sits in a warm moist environment. Again dependent upon outside air temps and the temps of the propane in the tank, this process may or may not work. That's why with a heavy use of propane going on, your success rate will be much better since the propane changing from a liquid to a gas state produces a cooling effect in the tank.

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Old 07-07-2006, 07:43 PM   #21
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Hello Michelle

I thought I sent you a message yesterday, wasn't sure if you received it? I believe it was concerning the size of your propane tanks? 30# vs 40#.....? Well, anyway was wondering if that was an option when buying a new AS? Love Missoula area, very beautiful.......

Take care,
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Old 07-08-2006, 12:11 AM   #22
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Tank Pictures

Lew,
here are the pictures from this afternoon. If you look closely you will see one of my tank is just above half full.
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Old 07-08-2006, 01:11 AM   #23
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Michelle,

Thanks for the pics. Are your guages surface mounted, or do the attach with a thru-tank fitting? Is it's the latter, it would be the first time I have seen a DOT tank with more than one access fitting.
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Old 07-08-2006, 01:19 AM   #24
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Propane Level?

O.K. you people are all beating around the bush, but some of you pretty well hit it. The level of propane is at the sweat or condensation level. Some times during use and certain weather conditions they will show by condensation. Or just pour hot water on your tanks, down the side, and it will instantly show you the level.
They make a kit for barbeques to check the propane level; It comes with a decal to stick onto the tank with level marks [gauge] and the instructions say to pour hot water onto the tank then read the level. You don't need the decal to tell you if you have 1/3 or 1/2 tank.
As for the propane gauges, on the most part, they are very inaccurate because they work on pressure and the pressure doesn't change much from a full tank until almost empty.

Bob
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Old 07-08-2006, 09:11 AM   #25
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I believe that the vapor pressure is around 90 PSI at around 70F, Bob. Relief valves pop off at around 300 PSI.
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Old 07-08-2006, 11:44 AM   #26
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Lew,
They screw into a fitting in the tank. if you rock the trailer you can hear the float on the stick and see the guage move. Thses also register on my status panel in the trailer. Fairly accurate for both the electronic and the direct read.
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Old 07-14-2006, 01:48 PM   #27
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Ohmygawrsh!

Like they say, don't try this at home -- a transparent LP cylinder: http://litecylinder.com/

This raises more questions than it answers. Do we bet a complete Nuvite job on whether it is even on the market in 5 years? I'd bet after the first few accidents it will be out of business from legal comparisons to steel tanks.
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Old 07-14-2006, 02:01 PM   #28
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I'm betting the "clear" tanks are filament wound fiberglass. I worked in this industry (giant tanks) for a while and they are very reliable "old school" technology. I think the only reason they haven't been used for small scale operation is cost. There's a hell of a lot more work that goes into a composite tank than a welded steel vessel. Both have pros and cons when it comes to durability. The steel will likely stand up to impact better but the plastic tank is more corrosion resistant.

We got a magnetic strip that you're supposed to be able to read the level without pouring water over the tank. We'll see how it works this weekend. You do have to be using the tank for it to register a temperature difference. Nice thing about the magnetic vs stick on is we can slap it on the exchange cylinder we use for the BBQ at home and the propane tank top heater.

-Bernie
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