Are you planning your first BBQ of the summer or maybe its your tenth? If so, I am sure that if you are using a propane tank from last year or even last week you might not be certain how much gas you actually have left and there is nothing worse then leaving your meat on the grill as you scurry to get another tank. So you shook the tank and it seemed full, and you are pretty sure that you had enough left from the last BBQ but honestly, why risk it? The Truma Propane Tank Level Check is just the device you need to ensure your levels are just right. With the use of ultrasound to look inside your tank, the Truma Level Check makes sure you always have enough and it only cost $90.