Filling level display for gas cylinders Use LevelCheck to find out how much gas is left in the gas cylinder in just a few seconds. Using ultrasound, the handy filling level indicator shows whether there is liquefied gas within the measuring range. Simply place LevelCheck horizontally on the cylinder: if the LED is green, there is gas in the cylinder. After measuring, LevelCheck switches off automatically. Measures quickly and reliably in a few seconds Easy to use, with LED display, ready for immediate use Suitable for all steel and aluminium LPG gas cylinders from 200 to 350 mm diameter Lightweight yet robust