WHAT is hidden under the surface? That was the question that Ingvar Elfström asked himself as a young kid in the mid forties. He used to sit and try to see the bottom of the sea on his fishing trips together with his father. The problem was that there was no diving equipment to buy. In order to explore this world he was forced to develop and manufacture his own equipment. 
The first prototype to a breathing regulator was made 1954. The very same year Ingvar started the diving club Poseidon. He got a chance of exchanging ideas with other interested people. The first series of twin hose regulators, with the name Poseidon Senior, was manufactured by Ingvar in his kitchen. After a few years he started to develop his regulators together with Rolf Tistrand, who has been in the company since 1957. Their next product was the regulator Cyklon Junior. The first ever manufactured single hose regulator in the world designed for diving. 

Together with his good friend Dennis Österlund sales started to take off. Products were sold under the name Poseidon and marketed by Aqua-Sport. The equipment that they could not produce was imported from foreign manufacturers. The Company continued to grow and Ingvar and Dennis moved the production ofregulators from their kitchen to a rented garage. The first shop was opened in Gothenburg 1958. Shortly after that, shops were opened in Stockholm and Malmö. 

In 1958 POSEIDON set the world standard for regulators

The less complicated the better. With these guidelines we have developed somewhat genius solutions to difficult technical problems. Out from the function then comes the design, where our own development department always tries to eliminate the unnecessary, the possible sources of error. The most distinct characteristic needed for a regulator to make the Poseidon family is its simplicity to use for you as a diver. No wheels and levers are allowed for changing airflows or breathing resistance. Instead, this is automatically regulated in Poseidon regulators. We have said it before and we are saying it again. All for the purposes of letting you devote yourself entirely to what you are there for ?the ultimate dive.  MINIMUM RESISTANCE. MAXIMUM SAFETY . Right from the start in 1958 with Cyklon, Poseidon regulators have been known for extremely high performance. Where engineering art at the highest level has created precision instruments, always with function, simplicity and reliability in focus. In the tests made by independent institutions, Poseidon regulators have almost always been outstanding. One example is when the American Navy tested breathing capacity on 51 regulators. The results showed that Poseidon? regulators were far better then the competition in the ability to give air without noticeable breathing resistance. The US Navy also made a big test to approve regulators for use in cold water. Six different regulator combinations were qualified from Poseidon. Another test was made at a water temperature of ? degrees Celsius (approx. 28 F) and at a depth of 60 meters (approx. 180 feet) where the risk for freezing of the Jetstream regulator was estimated to being extremely small. Based on these tests, the US Navy chose us as their main supplier for regulators.

The accessibility of diving suits, in the fifties, was a big problem. The main problem was finding a suitable non-permeating material. The American company Rubatex produced a thick rubber material that after a small modification could be used in the manufacture of wet suits. 

In 1963 Poseidon got a request, from the Swedish Navy, could it be possible to produce a suit that could be used for longer exposure times. After some research and experimenting with different manufacturing techniques they produced a dry-suit that fulfilled the Navy's demands. The first airtight neoprene dry-suit, the UNISUIT, was delivered to the Navy 1963. The very same year Poseidon started to export products. Ingvars big dream was realized in 1984, when a factory fully adapted for diving equipment manufacturing was built. 

Ingvar died in 1998 at the age of 70 years. His life's work was to make the exciting world under the surface of the sea possible to explore for everyone.

XSTREAM SIMPLICITY . A milestone for extreme diving. A new world standard for regulators. One can give the world premiering Xstream many epithets. The fact is that simplicity has once again been our guiding star. Maybe here more than anywhere, minimizing the sources of error, the number of ports, wheels and levers that can mean safety risks, mean the most to the user. If you ask an extreme diver what he wants from his equipment in general and regulators in particular the answer is univocal. Professional divers, cave divers and wreck divers, people who put their equipment to really hard tests rely on Poseidon. They want equipment that will function in all situations and that they can rely on to 100%. To meet with their demands to the maximum we have developed a brand new regulator concept that allows diving with all types of gas mixtures.