The Home Smart Magnetic Gas Level Indicator is a reusable tool that helps you check how much propane or butane gas is left in a metal cylinder. Instead of guessing or lifting the tank, it gives a quick visual reading while the gas is being used.
It works with temperature-sensitive crystals that change color when the tank surface becomes cooler. When gas is turned on, the liquid inside absorbs heat as it turns into vapor.The indicator shows this difference with a color change, revealing the gas level.
The strip has a magnetic backing, so it easily sticks to standard steel LPG cylinders and can be reused. To use it, place it on the lower half of the tank, turn on the gas, and wait a few minutes. The color line shows how much gas remains.
Overall, it is a simple, safe way to monitor your gas and avoid running out unexpectedly.