Environmental Sealing
Those of you who already dive or plan to dive in cold water, or who dive in fresh or salt water with high particulate matter, should consider an environmentally sealed regulator.
Sealing the first stage keeps the inside mechanisms from coming into contact with the water and helps to prevent ice forming. It won’t fill up with abrasive grit and sand particles either, or end up encrusted with salt crystals in places from which they can’t easily be removed.


The Design
The first stage is built from forged brass with a sanded chromium-plated finish, and incorporates a high-performance balanced diaphragm that is totally sealed from the outside environment.
The two high-pressure and four low-pressure outlet ports are evenly distributed either side of the first-stage body. Two of the low-pressure ports are inclined at 20° and both the hp ports at 30° to enable streamlined hose-routeing.

The DX 200 ICE has options for 232 bar A- clamp or 300 bar DIN connections.
The second stage is built from lightweight high-grade technopolymer and elastomers with what the makers call a “Luxury Technology” treatment for abrasion resistance. Metal components around the face act as a heat-sink for better coldwater performance.
The second stage features two user-adjustable controls, a dive/pre-dive venturi lever and a breathing-resistance dial.
The first and second stages are connected with a lightweight braided hose, and the whole set-up is compatible for use with up to 40% nitrox and has been awarded a CE EN250:A coldwater rating.
An oversized purge button in Seac’s black and silver 40th anniversary livery on the second-stage face completes the package.


In Use
I know the DX 200 ICE was designed and built for frigid waters, but unfortunately (yeah right!)
I had to take it to the Caribbean to test it, so I really can’t comment on its coldwater attributes.
I can however report that over a week of intensive diving it proved a great performer.
The lightweight braided hose was flexible enough to allow me unrestricted head movement, and the polymer second stage felt weightless in my mouth. The purge was brilliant to use, thanks to its large size. I could depress it with a single digit from any angle and it immediately delivered enough air to displace any water trapped in the mouthpiece.
The well-thought-out angled first-stage ports streamlined the route of the hoses, keeping them neat, tidy and unobtrusive.
I went through the usual spit the reg out, turn upside-down and breathe heavily with my buddy sharing the octopus routine, and the Seac never wavered.
The mouthpiece was big and comfortable to bite down on. Its moulded silicon has a gum-guard and side-rails that stopped any water seeping in through the corners of my mouth.


Conclusion
Because of the stringent tests diving regulators have to pass to get their CE certificates before they can be sold in Europe, the regulators I test nowadays tend to be much of a muchness in regards to how they behave and breathe under water.
That’s good news for me as a tester, because the life-support equipment that’s on the market isn’t likely to kill me, but the bad news is that they’re all very difficult to tell apart.
The Seac DX 200 ICE was no different in this department and so, like most of the modern regulators I test, it was a little bit boring.
No freeflows, no loss of air delivery and no reduction in performance at depth meant that I didn’t even have to think about it being in my mouth.
Come to think of it, that’s the kind of boring I like.

PRICE £399
FIRST STAGE High-performance balanced diaphragm.
PORTS 4 lp (two set at 20°) and two hp set at 30°
SECOND STAGE Pre-dive/dive Venturi, breathing resistance dial
CONNECTIONS 232 bar A-clamp, 300 bar DIN
WEIGHT 1235g (A-clamp)
NITROX COMPATIBLE Yes, 40%
CONTACT www.sea-sea.com
DIVER GUIDE width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100%

See more regulators in Divernet Marketplace