Editing Scuba set (section)

===Monitoring instruments===
{{See also|Submersible pressure gauge|Diving rebreather#Control of the breathing gas mix}}
The basic instrument for monitoring available gas is the submersible pressure gauge, which indicates the remaining pressure in a scuba cylinder, by directly measuring pressure at a high-pressure port of the regulator first stage. Recreational divers commonly mount the SPG in a rubber or plastic {{visible anchor|console}} along with other instruments like a compass, depth gauge and/or [[dive computer]]. An alternative to the SPG is a [[pressure transmitter]] fitted to a high pressure port that wirelessly transmits the cylinder pressure to the [[dive computer]] for display, a system known as [[air integration]].<!--get ref from Dive computer article-->

Many closed circuit rebreathers use advanced [[electronics]] to monitor and regulate the composition of the breathing gas.<ref name="PADI RB" />