When activated, this propane tank gauge automatically senses the propane in your tank and indicates the amount remaining.

How does it work? This Removable Acc-Level Propane Tank Gauge utilizes a very special yellow ink. When slightly heated, this ink will change color from yellow to orange. Upon cooling, it will change back to yellow. There is nothing that gets used up or wears out.

Features:

• Magnetic and movable from tank to tank
• Fits all R.V. and B.B.Q. tanks
• Easy to use and will last for years
• Will not fade in the sunlight
• Made in USA