There are many gauges on offer. There are three types of gauges available: Analog, Digital, and Pneumofathometer models. For safe diving, it is crucial to select a gauge that meets your requirements. 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. A graduated scale is used to indicate depth. 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. One advantage of using an analog gauge is that you will never run out of batteries.
The gauge's display is easy to read. The gauge has numerical increments that range from 10' to 40’ and 20' up to 150'. It also has a pressure gauge. It displays pressure ranging from 0 up to 5000psi. The red screen is reserved air while the green screen is main air.
Digital models
Many divers want to stay long and dive deep, but a digital gauge won't help them do this. Temperature fluctuations can alter the pressure difference between your gauge and the surrounding water. A mechanical gauge is far safer than an electrical gadget. The gauge can keep track of your dive time, depth and will also calculate your Nitrogen retention to prevent you from getting decompression sickness.
There are two main types of digital gauge diving computer. The hose method is a simple method, using a hose to connect the dive computer to the high-pressure port on the first stage. Wireless mode uses an electronic transmitter to communicate with the computer. This type is also available in console and wrist-mounted models.
Pneumofathometers
Pneumofathometers measure the depth of the air supply to a diver. These devices measure surface air pressure and indicate depth in meters or feet. These devices were once mounted on a hand crank air pump, which supplied breathing air to the standard dive suit. The air supply was free flowing, with no back pressure.
If you are interested in gauge diving, you should get a gauge with a range from 130 to 160 percent of your diving system's maximum operating pressure. This range is sufficient for systems operating at 3,000 psi and more.
Submersible pressure gauges
Submersible pressure gauges (SPG) are devices that allow divers to monitor their air pressure. It can also display the current depth and direction of the diver's movement. An SPG is typically attached to the regulator by a high-pressure line. This arrangement allows the diver to minimize confusion about where the gauge is located and keeps it from getting lost. An SPG displays the air pressure remaining in pounds per square inch. This is useful for monitoring air supply when diving.
Scubapro manufactures an oil-filled, analog depth gauge. The Bourdon tube design measures down to 200 feet. It also comes with a C1 compass, which attaches to the console boot for more versatility. Because it is easy to use, this gauge is ideal for beginners.
Compass
The best compass for gauge diving is the one that is easy to read. It should be large enough for you to read underwater and with the correct markings. 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's to see the direction the compass is pointing even when it is dark.