A surface pressure gauge (SPG) is very important for your dives. They allow you to see how much air is still in your tanks. They’re made of sturdy materials, such as brass or plastic. Often, they have one or more loops to attach a safety lanyard, to make sure you don’t lose it.
SPG’s can be displayed in PSI or bar. However, we only sell SPG’s in bar.
Depth gauges are made to show you how deep you are underwater. After the dive, the trailing needle shows how deep you were on your last dive.