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
Analog gauges for gauge diving can help divers understand the depth in 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. Although they are more reliable than the digital gauges, analog gauges can still be used. An analog gauge has one advantage: you won't run out of batteries.
The gauge's front is simple to read. It has numerical increments of depth ranging from 10'-40' and 20’ to 150'. A pressure gauge is also available on the gauge. It displays pressure ranging from 0 up to 5000psi. A red screen indicates reserve air, while the green screen shows main air.
Digital models
Divers want to dive long and deep. A digital gauge will not help them achieve this. Temperature changes can affect the pressure difference between the gauge's water and the ambient. Fortunately, a mechanical gauge is much safer than an electronic 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 approach is simple and uses a pipe to connect the diver's computer to the high pressure port at the top of the first stage. Wireless mode, on the contrary, attaches an electronic transmitter to the first stage to communicate to the computer. This type is also available in console and wrist-mounted models.
Pneumofathometers
Pneumofathometers allow you to determine the depth of oxygen supplied to your diver. These devices measure air pressure at the surface and then indicate the depth in feet or metres. These devices were originally mounted on a hand-cranked pump that supplied breathing oxygen to the standard diving suit. The air supply was completely free-flowing, and there was 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. For systems that operate at 3,000psi or higher, a gauge with this range will suffice.
Submersible pressure gauges
A submersible pressure gage (SPG), which allows scuba divers keep track of their pressure, is a device used by divers. It displays current depth and directions of diver movements. The SPG is usually attached to the regulator via a high-pressure hose. This arrangement is useful for divers to avoid getting confused about the location of the gauge and helps prevent it from being lost. The SPG is a gauge that shows you the remaining air pressure in psi. It's useful for monitoring your air supply during diving.
Scubapro produces an oil-filled analog depth gauge with a Bourdon tube design that measures to a depth of 200 feet. It comes with a C1 Compass, which attaches directly to the 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. Look for a compasse with a bezel that includes indicator marks and compass headings.
A compass for gauge diving should also have a side view window so the diver can see the direction that the compass is pointing. This allows the diver see the direction that the compass is pointed even in complete darkness.