Inner and outer rings of diving watch

Introduction to the functions of the inner and outer rings of the diving watch
Divers like to carry a small amount of oxygen tanks, in order to reduce underwater weight, but the amount of oxygen is related to the size of the oxygen tank. Therefore, people familiar with diving equipment will bring devices to measure the amount of oxygen, and the diving table timely reinforces this need. The rotating outer ring can be said to be the biggest feature of a diving watch, serving as a reminder of diving time. The rotating dial is marked with a scale of 15, 30, or 45, as the oxygen bottle for diving can only hold 45 minutes, and some individuals are marked with a scale of 60 minutes. The first 15 minutes are colored or specially marked, as divers will strictly observe a 15 minute safe stop during ascent to fully release the nitrogen absorbed from the cylinder. "Usually, when diving, one only needs to rotate the dial so that the 0 scale on the dial is aligned with the minute hand, and then observe the scale on the corresponding dial after the minute hand moves to know the diving time.". Of course, you can also count down your diving time. First, know your diving time, turn the dial to align the minute scale with the minute hand, and then the time when the minute hand reaches the zero scale is exactly your diving time, which means that the position of the zero scale is your diving limit time.
The rotation of the outer watch ring is designed to be in a single counterclockwise direction, which is to ensure that the calculation time is only calculated more, not less, and to prevent misoperation from prolonging the time and causing danger. The scales and numbers are equipped with a professional fluorescent coating for clear display when underwater light is dim. The newly developed built-in chronometer ring has no restrictions on the direction of rotation, as the crown that controls the ring must be locked before launching. For example, the Aquatimer Cousteau from Wanguo has a built-in clock ring that can ensure a prompt effect without the need for additional holes in the case. Another advantage is that there is no need to clean up the sediment in the seams of the watch ring and case after the water comes out. In fact, perhaps only 5 of the 1000 people who buy a diving watch have a chance to dive to a depth of 50 meters. Compared to the nominal number, more players prefer the clear answer sound when rotating the watch circle. Omega's Ploprof Coaxial Diving Watch rotates its outer ring using an orange button attached to the upper right side of the watch case. It can rotate in either clockwise or counterclockwise directions. This type of design with a two-way rotation outer ring is relatively rare. There is actually no process available on the bezel, but Bopp's 50 series of single rotation bezels are unique. The designer used sapphire crystal to cover the fluorescent scale (instead of ordinary high-tech ceramics), and especially spent several years researching and developing an adhesive that bonded the fluorescent scale material to the sapphire watch ring and metal watch ring, and applied for a patent. Rolex uses patented PVD technology to fill the rotating dial with platinum. Due to the use of a new luminescent material that can emit blue light, the triangular zero indicator on the outer ring of the scale can be seen for longer periods of time at night or in the deep sea.
All diving watches are equipped with eye-catching luminous pointers and scales, which is because divers tend to be in the dark deep sea. Therefore, the pointers, scales, or surfaces of diving watches are usually coated with fluorescent materials, and the dimensions of the pointers and scales are deliberately enlarged to make it easier for the user to read the time.
The early luminous material was radium, which was discontinued due to excessive radiation. Currently, the most commonly used luminous materials include Super LumiNova and tritium gas tubes. Super LumiNova is a new material that absorbs gamma particles in light to store light and can emit light for over 10 hours, but the intensity of the light will decay after a certain period. Tritium tube night lighting (also known as "gas lamps") is a major leap forward in modern night lighting technology. The use of tritium gas tubes is a glorious tradition of Ball. The advantage of self illumination is that it not only has high brightness, but also has a long service life - reportedly up to 25 years. The principle is to fill a mineral glass tube coated with phosphorescent material on the inner wall with gaseous tritium, and use the B rays of tritium to stimulate the reaction of the phosphorescent material to produce a cold light source. This light source does not emit dazzling light and heat, nor does it burn or explode. The tube wall can isolate B-rays, and as long as the tritium tube does not break, it is harmless to humans. The tritium gas tube does not require external energy supply or reflection from external light sources, and can maintain stable and lasting luminescence for 10 to 20 years. On the back cover of the watch case, the tritium tube night light is marked with the letters 3H illumination and mbmicrotec. On all of Bohr's watch pointers and scales, there are tritium tube night lights (also including temperature and second hands). The only disadvantage of doing this is that the pointer can be relatively heavy, especially the second hand, which should have a slight impact on the movement of the watch. To maintain balance, the second hand of a Boer watch has a "long tail" or a "flower tail" composed of two RRs. The luminous effect of the dial of the Panahai Radiomir is achieved by applying a special coating on the markings and indicators, which is a mixture of zinc sulfide, radium bromide, and neothorium. This compound, invented and formulated by Peinahai, was previously a feature of the targeting and observation instruments produced by Florentine. The powerful luminous effect makes it unnecessary for the instrument to use auxiliary lighting equipment that may be discovered by the enemy to illuminate itself in a completely dark environment.