There are various types of gauges available on the market. There are three types of gauges available: 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
An analog gauge for gauge diving is a tool that allows divers to determine the depth in the water. They work by having a needle pivot around a graduated scale to indicate the depth. These gauges can either be worn on the wrist or integrated in the dive computer. While they are more reliable and accurate than digital, the analog ones can be worn on the wrist or integrated into the dive computer. One advantage of using an analog gauge is that you will never run out of batteries.
The gauge's face has been designed to be easy-to-read. It has numerical increments of depth ranging from 10'-40' and 20’ to 150'. The gauge has a pressure indicator. It can display pressure from 0 - 5000 psi. The red screen represents reserve air, while green indicates main air.
Digital models
Many divers desire to dive deep and stay there, but a digital gauge can't be used. The difference in pressure between the gauge and the ambient water can be affected by temperature changes. Fortunately, a mechanical gauge is much safer than an electronic gadget. In addition to keeping track of your dive time and depth, the gauge will calculate your Nitrogen retention and help prevent decompression illness.
There are two basic types digital gauge diving computers. The hose connection is a basic method that uses a hose. This hose connects the dive computer with the high-pressure port of the first stage. 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 can be used to measure the depth of air that is supplied to divers. These devices measure the surface pressure of air and indicate the depth either in feet or meters. In the past, these devices were mounted on the hand-cranked air pump that supplied breathing air to the standard diving suit. The air supply was a free-flow system with no backpressure.
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. A gauge with this range would suffice for a system that operates at 3,000 psi or more.
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 connects to the regulator using a high pressure line. This arrangement allows the diver to minimize confusion about where the gauge is located and keeps it from getting 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 offers an oil-filled analog depth gage with a Bourdon tub design. It can measure to depths of up to 200 feet. It comes with a C1 Compass, which attaches directly to the console boot. This gauge is ideal to beginners, as it is simple and straightforward to use.
Compass
The best compass for gauge diving is the one that is easy to read. The compass should be large enough to be read underwater and be marked with the appropriate markings. Look for a compass with a bezel with compass headings grouped in 30-degree increments and indicator marks every five degrees.
A gauge diver's compass should have a side view window to allow them to see the direction it is pointing. This allows the diver, even in total darkness, to follow the compass's course.