is a German national organization for standardization from which the modern types and sizes of scuba connector hardware takes its name. Thes are modern direct screw-in connectors.
- Pressure gauge – In order to monitor breathing and gas pressure in the diving cylinder a diving regulator with a high pressure hose leads to a content or ‘pressure’ gauge which then reads the amount of pressure in the system. This is important as the diver will use this info to determine how much useable air is left in the tank.
Standard Pressure gauges- Standard pressure gauges are analog gauges that are held in the palm of the hand and are connected the first stage by a high pressure hose.
Button Gauges – Button gauges connect directly to the first stage and are often used on decompression cylinders. These can be a little difficult to read as they are typ0cically quite small in size.
Air Integrated Computers – These are great for more application and reading options when it comes to an updated diving cylinder pressure reading, but these should always be backed up with a standard air pressure gauge of some kind.
Mechanical Reserve Valves
Throughout diving history there are some types of cylinders that use mechanical valves that restrict the flow of air when the pressure is below a particular amount. These are known sa ‘j valves’ because the letter ‘J’ is next to the valve in U.S. diving catalogs.
Valve without the reserve lever are called ‘K valves’ for similar reasons. Modern diving equipment features J valves with a reserve valve in the open position. Such typical setups would also need to depend on a contents gauge or computer in order to accurately monitor gas supply.
How to produce clean, dry, divers breathing air that meets international standards
This article exposes the commonly held misconceptions about how compressor filtrations systems really work, and underlines the essential checks and maintenance necessary to produce clean dry divers breathing air - and save the dive operator a pile of money long-term in unnecessary scuba tank replacement costs.
How to Avoid Isobaric Counter diffusion hits during trimix decompression
Isobaric Counter Diffusion triggered by breathing gas changes is predominantly a problem when carrying out Trimix dives that are deep enough and long enough to generate formal decompression stops that require the use of a hypoxic Trimix. An analysis program embodying these concepts to identify known unsafe ICD gas switching practices and unsafe decompression is made available
Decompression trends for extreme dive planning
Deriving the underlying laws and predictive mathematics for diving physiology, safe decompression, Oxygen toxicity tolerance, narcosis, and HPNS (High Pressure Nervous Syndrome) have challenged the minds of the world?s brightest scientists. That many of the victims of ?incorrect guestimation? fail to survive extreme decompression and be part of the ?observable phenomenon? database further hampers progress.
As a first topic in this series of articles we will take a more in depth look at decompression.
Vigilance urged when treating decompression illness with US Navy table 6A
July 2005:- Satahip, Thailand 2005 was the location for the first hyperbaric technician course run by the British Diving and Diseases Research Centre (DDRC) - An organization set up to study the effects of pressure and provides hyperbaric chamber oxygen treatment facilities and medical training for divers, technicians, nurses and doctors worldwide.
During the course, the use of the various USN tables for the treatment of decompression illness and was studied. Technician trainees also had the opportunity to visit mono-place chambers at the Queen Sirikit Naval hospital to witness the use of hyperbaric oxygen to treat skin infections that did not respond well to other techniques.
For divers, the treatment of DCI generally results in the use of two US tables. Table-6 for type I DCI-pain only symptoms and skin rashes, and USN treatment table 6A for the treatment of type II DCI-Arterial Gas Embolism. Unfortunately, table 6A is also notorious amongst for causing DCI amongst attending medical personnel...
World record deep dives made using new decompression technique
A new decompression diving technique based on the Combined Decompression Model CDM-18 that provides the knowledge base used by two previous world record breaking deep divers is made available to the diving public. A spreadsheet implementation of the CDM-18 model analyzes any dive profile and breathing gas combination for correct decompression methodology, clearly identifying any profile abnormality or breathing gas change that would likely cause DCS.
First Internationally recognized Dive Technician Courses to be run in Thailand.
Samui Easytek, Pattaya, Thailand to Teach the ASSET Approved 10 Day Dive Industry Technician (DITC) Training Course.
Divers Breathing Air compressor technical data now available on-line
www.scubaengineer.com creates an online database of compressor servicing information expanded to include all past and present Bauer and Coltrisub Compressor service manuals.
First steps to improving Scuba tank safety in Thailand
Samui Easytek Co, Pattaya opens Thailand's first combined Hydrostatic and visual inspection station for testing scuba tanks to international specifications. The UK designed system features traceable measurements of scuba cylinder abnormalities to US,UK and European CE standards and utilizes a separate test station for carrying out the latest magnetic eddy current equipment capable of detecting invisible SLC cracks that have cause several fatal scuba cylinder explosions
