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

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