The simplest gauge I know of is rocking the tank.

I just ordered one of the magnetic stick ons. We don't seem to go thru that much propane and I get an empty cylinder filled long before the full one is depleted. But we have not had to use the furnace while out on the road yet. Even if you have a remote indicating sensor you still have to go out into the dark and rain to swap cylinders. It's like the people bragging about electric black/gray valves. You still have to go out and disconnect the lines when you leave.

  On 11/24/2019 at 8:05 AM, agesilaus said:

Even if you have a remote indicating sensor you still have to go out into the dark and rain to swap cylinders. It's like the people bragging about electric black/gray valves. You still have to go out and disconnect the lines when you leave.

That's what raincoats are for. And the extra extension bar near the back of shower is for hanging that raincoat when you are done.

Linda Sand

What is this talk about going out in the dark and rain to swap cylinders?  With the automatic changeover regulator they swap themselves.

I use my sensor (in the daylight) to give me an idea when the "primary" tank is getting low so that I know to keep an eye on the regulator over the next couple of days, depending on usage. When the red indicator shows that the regulator has switched to the secondary tank I take the empty tank in to get filled. This is all very controllable, and I've never been outside in the dark of night messing with tanks...

I'd rather swap it over myself then I know that the MT needs to be filled.

I have a friend who does this as well.  Ends up outside at 2:00 a.m. on a freezing cold night because the furnace has stopped working and the trailer is cold.  Makes absolutely no sense to me, but different strokes...

Edited November 24 by mptjelgin

  On 11/24/2019 at 8:05 AM, agesilaus said:

I just ordered one of the magnetic stick ons. We don't seem to go thru that much propane and I get an empty cylinder filled long before the full one is depleted. But we have not had to use the furnace while out on the road yet. Even if you have a remote indicating sensor you still have to go out into the dark and rain to swap cylinders. It's like the people bragging about electric black/gray valves. You still have to go out and disconnect the lines when you leave.

No going out at night to switch cylinders, just use the auto-changeover feature of the gas valve. Check LP supply level indicator before leaving the CG next morning and refill the empty.(if one is empty)

Edited November 24 by Ray,IN

We carry a 30 lb cylinder in our Class A that we use as an external supply connected to an Extend-A-Stay adapter for longer term stays. When that supply is empty, we switch to the onboard tank until the portable cylinder can be refilled. It's obviously much easier to haul the 30 lb'er to a refill station rather than taking the whole rig to refill the main tank. Having a low cost remote reading level gauge for the cylinder would be more convenient than using hot water or a direct reading probe to see if the cylinder will keep the furnace running through the night versus switching over before bedtime. I think I'll order the $20 weight based Bluetooth device and find out...

I think float gauge in a propane tank consists of moving parts situated both inside the tank and outside. At the end of the stem is the float (pictured below) that rises and falls with the level of the propane in the tank.

  On 11/30/2019 at 2:19 PM, Jennifer Ministries said:

I think float gauge in a propane tank consists of moving parts situated both inside the tank and outside. At the end of the stem is the float (pictured below) that rises and falls with the level of the propane in the tank.

Okay, thanks, Jennifer.