Flame King Propane Tank Digital Scale for 5LB, 10LB, 20LB, 30LB, 40 LB Propane Tanks, (Black)

This product works well and provides a very good estimate of remaining propane.The one glitch is that you shouldn’t leave the battery in it when not using it for a long time. I’m buying a replacement unit because leaving the battery in it over the winter months destroyed it. My mistake. It is a useful enough product to buy a second time.Other types of sensors (the ultrasonic one that attaches magnetically to the tank bottom; pressure sensors that attach to the valve connection) have not done a good job. The ultrasonic ones are great when they work but I was not able to get consistent readings. Always adding gel, replacing batteries, repositioning. The tank valve ones are useful for showing if you have enough fuel for today, but don’t really tell you if you have 1/3 tank or a full tank. Cheap spring scales usually have a display in an inconvenient place.

No more guessing if and when your propane tank is empty. The easy conversion from one size tank to another is bonus.

Well thought out placement of the digital display. Easily viewed while lifting the tank. That's a big plus compared to other manufacturers designs that make you lean over while lifting to see the front face where they put their display. This unit reads out in percentage of full as opposed to absolute weight. The display changes in increments of 10%, therefore your readings will be 10%, 20%, 30%, 40% etc. I checked the accuracy using a shipping scale and it is reasonably accurate.

Works very well be aware reviews are correct the battery opening is very tight and prone to breaking .. be carefull

I always hated guessing about how much propane was left. With this all you have to do is set your tank size, lift the tank and you instantly know how much is left in the tank! Couldn’t be easier!