Gas Level Indicator Card For LPG Propane Butane Cylinder Fuel Level Check

Features The gas residue test card uses PET+liquid crystal material to complete color changes based on the pressure and temperature of the liquid and gas transition inside the tank. It can provide a reminder of changes in margin. Color changes according to temperature changes, with green indicating the current temperature point specifications Product size: 10 * 20CM (including blister packaging) Product printing: color printing Material: PET+LCD+soft magnet Packaging: Blister packaging, Single product weight: approximately 30g Usage: Place the test card at the bottom of the tank and slowly slide it upwards. The card will show a color change, and the position where the color change occurs is the remaining amount of liquefied gas in the tank. Packaging includes 1 * Test paper jam