Seac

Seac Px100 (Yoke)

An Italian-made, cold-water-capable entry-level piston regulator built for training and dive-center use.

Seac Px100 (Yoke)
2.2Comparison Score
$395.26
Buy on AmazonBuy on Scuba.com
Released—
First stagepiston
BalancedNo
Environmentally sealedNo
Cold-water ratedYes
Connectionyoke
Max pressure230 bar
HP / LP ports1 / 4
Adjustable 2nd stageNo
Weight—
Nitrox-ready (EAN40)—
Octo includedNo

"HP / LP ports" is the number of high-pressure and low-pressure ports on the first stage, which caps how many accessories (transmitter, SPG, inflator, second second-stage) you can run at once.

Pros
  • Genuinely cold-water capable for an entry-level piston regulator via an integrated first-stage heat sink, tested to CE EN 250-2014 below 10°C
  • Simple, easy-to-service unbalanced piston design common in dive-center rental fleets
  • Compact, lightweight second-stage housing with a Dive/Pre-Dive venturi switch to curb freeflow at the surface
Cons
  • Unbalanced piston first stage means breathing effort increases as tank pressure drops
  • Not environmentally sealed, and no true adjustable breathing-resistance knob, only the venturi switch
  • Weight and exact nitrox percentage aren't documented on Seac's own retailer spec sheets, a gap not seen elsewhere in this batch
Diver community sentiment
Mixed opinions

On Scubaboard, divers who own the Px100 generally describe it as a perfectly adequate entry-level or rental-grade regulator with no major complaints, but note real limitations: it's an unbalanced second stage with a crude venturi control, and breathing effort can increase as tank pressure drops. When compared directly against mid-range regulators like the Scubapro C370, experienced divers and instructors described the difference as significant, calling the Px100 clearly inferior in breathing smoothness. An independent review corroborated this: solid build quality and effective cold-water heat-sink design, but breathing effort noticeably higher than premium regulators.

Scubaboard: Px100 vs Scubapro C370 comparisonDivernet: Seac Px100 review

Summarized from public forum discussion (Scubaboard, Reddit, and similar), not a survey we ran ourselves. See the linked threads for the original conversations.

The Px100 is Seac’s entry-level regulator, an unbalanced piston first stage that earns a genuine below-10°C cold-water rating through an integrated heat sink rather than environmental sealing. It’s commonly sold as a set with the Px Octo second stage, and is aimed at training, dive-center, and rental use rather than technical or extreme-cold diving.