Cook in comfort, shower without worry, and enjoy all your activities stress-free with the Dometic GasChecker GC 100. At just 30 g, you will be able to take this pocket-sized gas level indicator on any adventure. You will always know how much gas you have wherever and whenever you want. The hassle-free gas level indicator lets you check gas levels instantly with the green and red LED indicator lights visually showing the cylinder’s filling levels. Using two x 1.55 V batteries, this device measures with ease, using ultrasounds to determine gas levels so that you can stay on the road without worry.