- This instrument indicates the remianing pressure, from 0 to 300 bar within the bottle. There often is a 10bar scale which colors warn the diver if there is not much air left anymore.
- The instrument is mostly covered by caoutchouc.
- It is worth doing several dives with a borrowed device before you decide to buy an analogue or digital (computer) one.
- Clean with freshwater after the dive. Should the display not react when opening the first level, do contact an expert!