Never run out of LP fuel unexpectedly. The Mopeka LP ProCheck lets you accurately measure how much fuel you have in the LP tank and communicates that information wirelessly via Bluetooth to the Mopeka TankCheck App on your smart device. Now you can be aware of how much fuel is available at all times.• Accurately measure LP fuel levels• Sensor comes with magnets for use with steel LP tanks• Mounts magnetically to the underside of LP tanks• Fits LP tanks from 20 lbs. to 1000 gal.• Accurately measures fuel levels to 1%• Communicates via Bluetooth to FREE TankCheck App Fits LP tanks from 20 lbs. to 1000 gal. Comes with magnets for use with steel LP tanks Mounts magnetically to the underside of LP tanks | AP Products Mopeka LP ProCheck with Magnets in Blue