There are many different types of gauges that are available. There are three main types: Analog, Digital and Pneumofathometer models. A gauge that is right for you is key to a safe dive. For safety at high altitudes, it is essential to keep your gauge calibrated.
Analog gauges
Divers can use analog gauges to gauge dive. They are able to measure the depth of the water. To indicate the depth, they use a needle that pivots around a graduated gauge. These gauges can be worn on a wrist or integrated into the dive computer. They are less accurate than digital gauges but more reliable than analog. An analog gauge has one advantage: you won't run out of batteries.
The gauge's face has been designed to be easy-to-read. It features numerical increments of depth from 10' to 40' and 20' to 150'. The gauge also includes a pressure gauge. The gauge displays pressures from 0 to 5500 psi. The red screen represents reserve air, while green indicates main air.
Digital models
Divers want to dive long and deep. A digital gauge will not help them achieve this. Temperature changes can cause the difference in pressure between gauge and ambient water to change. A mechanical gauge can be safer than an electronics gadget. A gauge not only keeps track of dive time and depth but it also calculates Nitrogen retention and helps prevent decompression illness.
There are two main types of digital gauge diving computer. The hose method uses a hose to link the computer to the first stage's high-pressure port. Wireless mode, however, connects the first stage with an electronic transmitter. You can also find this type of diving computer in console or wrist-mounted models.
Pneumofathometers
Pneumofathometers, which are used to gauge the depth to which air is being supplied to a diver, are devices that measure air pressure at the surface. These devices measure surface air pressure and indicate depth in meters or feet. These devices were previously mounted on the hand-cranked compressor that supplied air to standard diving suits. The air supply was completely free-flowing, and there was no back-pressure.
Divers who want to use gauge diving should purchase a gauge with a range of 130 to 160 percent of the maximum operating pressure of their diving system. This range would be sufficient for systems operating at more than 3,000 PSI.
Submersible pressure gauges
A submersiblepressure gauge (SPG), allows divers to keep track and monitor their air pressure. It displays the current depth as well as the direction that the diver is moving. The regulator is connected to the SPG via a high pressure hose. This arrangement helps the diver avoid confusion and keeps the gauge from getting lost. A SPG shows the remaining air pressure in pounds per square inch and is useful for monitoring your air supply while diving.
Scubapro produces an oil-filled analog depth gauge with a Bourdon tube design that measures to a depth of 200 feet. For greater versatility, it also includes a C1-compass that attaches to its console boot. This gauge is great for beginners as it is simple to use.
Compass
Easy to read compass is the best for gauge diving. It should be large enough to be easily read underwater and have the appropriate markings for your requirements. You will want a compass that has a bezel with indicator marks at every five degrees and compass headings in increments of 30 degrees.
Side view windows are important for gauge diving. They allow the diver to see where the compass points. This allows the diver see the direction that the compass is pointed even in complete darkness.