0019193290501 Harold Import Hammerhead Accu Level Removable Magnetic Propane Tank Gauge, Clear

Like others, I experienced the difficulty of receiving these magnets bent in half to fit in the package. It's difficult to get that kink out when it's been sitting in a package for multiple years. I eventually got them mostly flat enough to stick to the tanks and sort of get a reading. Like others have said, you need boiling water to get a reading and sometimes it takes multiple tries to get a good enough color change to interpret the reading. I tried hot water out of the tap and that just makes the reading even more difficult. The best way to do this would be to weigh the tanks but mine are mounted inside a compartment in my RV. Removing them is a pain. I'm now looking for an alternative device.

Gages came (as shown) all folded up -- and wouldn't straighten out without the top plastic layer delaminating from rest of magnetic strip. Also, don't hold well over label on propane container (holds fine at top where there is no label). Also, to get reading when tank isn't in active use, one must find hot water and pour over strip). I bought an "Original Grill Gauge" which tells the weight of the tank, and is easy to use (also easy to misplace, whereas these magnetic strips are always there). So no perfect solution (gauges that fit on tank are hard to read when tank is underneath grill).

The item works. It doesn't need to be 12 inches long. Only the last 4 inches matter. Took a 20 oz cup of hot tap water, 1 min in the microwave, a slow pour over the bottom of the strip, and I could see where the fuel is after 5 seconds or so. I did this on a 90 degree day. I assume the water was around 150.I had to wait a few days to use it because it come rolled/folded and the magnet is not strong enough to overcome the bend. I put it on the side of the fridge under another magnet to get it flat. Once flat the magnet held to the tank and the hot water test worked.I think that the item were 4 or 6 inches long then it could be shipped flat. I don't think the item has to go to the top of the tank. I'm not to concerned about the top - just when the gas is low.

The product works as advertised, changing color when doused with hot water and indicating the level of propane left in your 20 lb tank, and I like that it worked well on a forty degree day when the old pressure gauge would not have registered anything. I have to take issue with the claim of a magnetic backing that allows you to move the strip from one tank to another. The magnetic pull is so weak that the strip barely holds to the side of the tank, and since the strip comes tightly folded in its packaging the many creases in it do not allow it to sit flat on the tank surface. I ended up super-glueing it to the outside of the propane tank for a good, solid attachment. Obviously, I cannot move it from one tank to another, but for four bucks and change I can afford to glue one to the outside of each of my tanks.

This product worked "ok" for me -- not great, but not horrible. It does require super-hot (near boiling) water to work effectively and, as I see it, that can be a bit dangerous walking around with boiling water. Once the water is hot enough to make the 'ink' turn orange, the gauge does display the level of LP in the tank -- so, that's good. One additional, though slight, nuisance is the strength of the magnetic strip -- it's pretty weak. Our LP tank has a bit of old, paper-label wrapped around parts of the tank and this magnetic gauge did not want to adhere where the paper remains on the tank. So, the product is ok but it's not a carefree solution to monitor the level of your LP tank.

Way to much work to use. You have to put it on the tank, then go boil some water and pour it over the strip to see how much propane you have. Needless to say, it is far from accurate. It told me I had over a 1/2 tank of gas, 20 minutes later there was no gas left and I made sure that there were no leaks, so when I went to get a new tank, I did the water thing again, it read full. 2 months later did the water thing again, still read full, and I had been bbq'ing on that tank almost every weekend.

We are always running out of propane, and wanted a gauge for the tank. After seeing these, we bought a few just to see how they would work since they were cheap enough.You have to heat up water, then pour it over the gauge to get a reading. The hot water turns the gauge orange, then the temp difference is sensed by the gauge and where ever there is gas in the tank, the gauge turns yellow. False positives show up in the folds of the gauge where it was stored in the package. You have be sure to smooth it out real good when applying it.It works, don't get me wrong, but I was hoping for a look and see at any time type of thing.

I have had the strip gages for a while. I have also installed tank gages. I just tried the strip gage again and it says my tanks are full; I know they are half empty! You cannot trust these strips, a waste of money. Like others have said use the cost of these strips to purchase gages. The pressure gages are many, many times better, but still not as good as float gages. I will be removing the strip gages.